Low-carbon transformation optimization method for chemical plant level ccus-eor

Abstract

The application relates to the technical field of chemical low-carbon optimization, and proposes a chemical plant-level CCUS-EOR low-carbon transformation optimization method: based on plant-level emission source sets, the benchmark emission of each chemical plant is calculated, the amount of captured CO2 is determined in combination with the industry capture rate, the annual EOR injection demand and the full life cycle storage demand are determined; the two types of demands are matched with the annual injection capacity and the cumulative storage capacity of the same target EOR reservoir under double constraints, and the feasible CCUS-EOR path is screened; under the unified cost caliber, the annual target transformation path of each chemical plant is determined, the selected path is locked, and the remaining annual injection capacity of EOR, the remaining full life cycle storage capacity and the path locking state are updated year by year, so that the full life cycle dynamic optimization of the plant-level low-carbon transformation path is realized, and the accuracy and rationality of emission reduction evaluation, reservoir resource allocation and transformation decision are improved.

Description

Technical Field

[0001] This application relates to the field of low-carbon optimization technology in the chemical industry, and in particular to a method for low-carbon transformation and optimization of chemical plant-level CCUS-EOR (Carbon Capture, Utilization, Storage and Enhanced Oil Recovery). Background Technology

[0002] With the deepening implementation of China's dual-carbon strategy, the low-carbon transformation of high-energy-consuming chemical industries such as oil refining, methanol, and synthetic ammonia is accelerating. CCUS-EOR, green hydrogen substitution, and CCU (Carbon Capture and Utilization) resource utilization are gradually becoming the mainstream technologies for emission reduction in the chemical industry.

[0003] However, existing low-carbon transformation decision-making technologies in the chemical industry fall into four main categories, each with inherent limitations: The use of regional industry averages ignores plant-level differences in parameters such as raw material routes, capacity, and remaining lifespan, making precise selection for individual plants difficult; It focuses solely on screening emission sources or EOR reservoir sinks, lacking bidirectional source-sink coupling verification logic; It relies on single-year static distance constraints for matching, failing to distinguish between annual EOR injection capacity and full lifecycle storage capacity constraints, and cannot dynamically update according to the different time attributes of these two types of resources; The economic cost comparison of transformation paths is disconnected from the CCUS-EOR (Carbon Capture, Utilization, Storage and Enhanced Oil Recovery) source-sink matching steps, failing to differentiate between feasibility and cost optimization.

[0004] Therefore, the relevant technologies cannot achieve individualized emission reduction assessment and precise screening for chemical plants, nor can they achieve dynamic tracking and rational allocation of oil reservoir resources. This can easily lead to problems such as source-sink mismatch, repeated occupation of sealed resources, and distortion of the economics of the transformation plan, which reduces the accuracy, rationality and reliability of the low-carbon transformation plan for chemical plants and urgently needs to be solved. Summary of the Invention

[0005] This application is based on the inventor's understanding and insights into the following issues: For the low-carbon transformation of high-emission chemical plants such as oil refineries, methanol plants, and synthetic ammonia plants, existing technologies mainly have the following four types of implementation schemes and their corresponding shortcomings.

[0006] (1) Renovation potential assessment method based on industry or regional average Existing research on low-carbon transformation in the chemical industry typically uses provincial, regional, or industry average emission intensity as the calculation unit. It first estimates the total emissions of the chemical industry in a certain region, and then estimates the emission reduction potential of CCUS-EOR (Carbon Capture, Utilization, Storage and Enhanced Oil Recovery) based on the average capture rate, average transport distance, or average storage cost.

[0007] Disadvantages: Emission reduction retrofits at chemical plants exhibit significant plant-level heterogeneity. Different plants vary considerably in terms of geographical location, product type, feedstock routes, production capacity, commissioning year, utilization rate, remaining lifespan, emission factors, and distance to EOR reservoirs. Regional averaging methods cannot answer plant-level decision-making questions such as "which chemical plant should be prioritized for retrofitting, which EOR injection point should its CO2 be sent to, and whether the corresponding reservoir simultaneously meets the annual injection capacity and full life-cycle storage capacity," easily leading to source-sink mismatch and distorted retrofitting sequence.

[0008] (2) One-sided screening method that considers only CO2 emission sources or only EOR sinks Some technical solutions focus solely on the emission source side, selecting CCS candidate projects based on the size of the plant's emissions or the cost of capture; other solutions focus solely on the EOR reservoir side, selecting available sinks based on the oilfield's remaining development potential or geological preservation potential.

[0009] Disadvantages: The feasibility of CCUS-EOR retrofitting is jointly determined by "source, sink, distance, remaining lifetime, injection rate, cumulative storage capacity, oil price revenue, and carbon price signal." Considering only the source side ignores the issues of insufficient EOR sink injection capacity and depletion of storage capacity; considering only the sink side fails to reflect the differences in emission intensity, capture scale, and retrofitting economics among chemical plants. Especially when multiple chemical plants compete for the same EOR sink, existing methods lack a unified tracking mechanism for sink resource consumption, cross-year occupation, and project lock-in.

[0010] (3) Static single-year source-sink matching and simple distance constraint method Existing source-sink matching methods often employ static spatial matching for a specific year, or connect emission sources to the nearest storage point within a fixed distance threshold. CO2 transportation costs are typically simplified to the straight-line distance between source and sink multiplied by the unit transportation cost, while EOR storage capacity is simplified to a single potential value.

[0011] Disadvantages: EOR has two different constraints: "annual injection capacity" and "cumulative sealed capacity," and their update mechanisms differ over time. Annual injection capacity can be reinitialized in each planning year, prioritizing locked projects; cumulative sealed capacity, on the other hand, is reserved once when a project is first locked according to its full lifecycle needs and continues to be used in subsequent years. If the path is interrupted and the release of unused reserved capacity is permitted, the corresponding capacity can be restored. Static single-year matching cannot describe the real-world constraints such as prioritizing existing EOR projects, reserving capacity for new projects throughout their lifecycle, the use of reserved capacity across years, the release of capacity during project interruptions, and the path locking of modified projects. This can lead to the model potentially reusing the same sealed capacity in different years, resulting in double-counting of EOR potential.

[0012] (4) Modify the method of separating path decision and EOR matching Existing chemical plant transformation models typically calculate the techno-economic feasibility of pathways such as CCUS-EOR, green hydrogen substitution, CCU (Carbon Capture and Utilization), and off-grid green methanol / synthetic ammonia, and then select the lowest-cost option through simple ranking.

[0013] Disadvantages: The feasibility of the CCUS-EOR path depends primarily on the source-sink matching results. If the EOR injection point is spatially inaccessible, has insufficient annual injection capacity, or insufficient cumulative storage capacity, then even if the capture cost is low, the modification cannot be implemented. Separating path cost comparison from EOR source-sink matching will lead to infeasible paths competing for resources, making it impossible to form a credible plant-level modification solution.

[0014] Therefore, the relevant technologies cannot achieve individualized emission reduction assessment and precise screening for chemical plants, nor can they achieve dynamic tracking and rational allocation of oil reservoir resources. This can easily lead to problems such as source-sink mismatch, repeated occupation of sealed resources, and distortion of the economics of modification schemes, which urgently need to be improved.

[0015] This application provides a chemical plant-level CCUS-EOR low-carbon retrofit optimization method to solve the problems in related technologies, such as the inability to achieve individualized emission reduction assessment and accurate screening for chemical plants, the inability to achieve dynamic tracking and rational allocation of oil reservoir resources, and the resulting reduction in the accuracy and rationality of low-carbon retrofit planning for chemical plants.

[0016] The first aspect of this application provides a method for optimizing the low-carbon retrofit of a chemical plant using CCUS-EOR, comprising the following steps: determining the baseline emissions of each chemical plant based on a set of emission sources at the plant level in a target area; calculating the captureable CO2 amount of each chemical plant based on the baseline emissions and the target industry capture rate, and determining the annual enhanced oil recovery (EOR) injection demand and the full life-cycle storage demand based on the captureable CO2 amount; binding and matching the annual EOR injection demand and full life-cycle storage demand of the chemical plant with the annual injection capacity and cumulative storage capacity of the same target EOR reservoir to obtain a CCUS-EOR path that meets the matching conditions; determining the target retrofit path for each chemical plant in each year based on a unified cost caliber; locking the path for the selected CCUS-EOR path for the chemical plant; and updating the remaining EOR injection capacity, remaining storage capacity, and path locking status of each chemical plant in the target area year by year to optimize the low-carbon retrofit path for each chemical plant throughout its life cycle.

[0017] A second aspect of this application provides a chemical plant-level CCUS-EOR low-carbon retrofit optimization device, comprising: a first determining module, configured to determine the baseline emission of each chemical plant based on a set of chemical plant-level emission sources in a target area; a second determining module, configured to calculate the catchable CO2 amount of each chemical plant based on the baseline emission and the target industry capture rate, and determine the annual enhanced oil recovery (EOR) injection requirement and the full life cycle sequestration requirement based on the catchable CO2 amount; and an optimization module, configured to combine the annual EOR injection requirement and the full life cycle sequestration requirement of the chemical plant. The lifecycle storage requirements are matched with the annual injection capacity and cumulative storage capacity of the same target EOR reservoir to obtain the CCUS-EOR path that meets the matching conditions. Based on a unified cost caliber, the target transformation path for each chemical plant in each year is determined. The chemical plants selected for the CCUS-EOR path are locked, and the remaining EOR injection capacity, remaining storage capacity and path locking status of each chemical plant in the target area are updated annually to optimize the low-carbon transformation path of each chemical plant throughout its entire lifecycle.

[0018] A third aspect of this application provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. The processor executes the program to implement the chemical plant-level CCUS-EOR low-carbon retrofit optimization method as described in the above embodiments.

[0019] A fourth aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described chemical plant-level CCUS-EOR low-carbon retrofit optimization method.

[0020] A fifth aspect of this application provides a computer program product, including a computer program that, when executed, is used to implement the above-described chemical plant-level CCUS-EOR low-carbon retrofit optimization method.

[0021] This application's embodiments can determine the baseline emissions of each chemical plant based on the set of plant-level emission sources in the target area, calculate the captureable CO2 amount by combining the industry capture rate, and determine the annual EOR injection demand and the full life cycle storage demand accordingly. It then performs dual-constraint matching of annual injection capacity and full life cycle storage capacity, screens feasible CCUS-EOR paths, determines the annual target transformation path for each chemical plant based on a unified cost caliber, locks in the selected CCUS-EOR paths, and updates the remaining annual EOR injection capacity, remaining full life cycle storage capacity, and path locking status of each plant annually. This achieves dynamic optimization of low-carbon transformation throughout the entire life cycle, effectively improving the accuracy and rationality of low-carbon transformation planning for chemical plants. Therefore, it solves the problems in related technologies, such as the inability to achieve individualized emission reduction assessment and accurate screening for chemical plants, the inability to dynamically track and rationally allocate reservoir resources, and the resulting reduction in the accuracy and rationality of low-carbon transformation planning for chemical plants.

[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a flowchart of a low-carbon retrofit optimization method for a chemical plant-level CCUS-EOR according to an embodiment of this application; Figure 2 A schematic diagram illustrating the principle of low-carbon retrofit optimization for a chemical plant-level CCUS-EOR according to a specific embodiment of this application; Figure 3 This is a schematic diagram of EOR source-sink dual constraint matching in a specific embodiment of this application; Figure 4 This is a cross-year EOR resource state transition diagram according to a specific embodiment of this application; Figure 5 This is a cost breakdown diagram of a specific embodiment of the CCUS-EOR in this application; Figure 6This is a diagram illustrating the competition structure of a plant-level modification path according to a specific embodiment of this application. Figure 7 This is a schematic diagram of a chemical plant-level CCUS-EOR low-carbon retrofit and optimization device provided according to an embodiment of this application; Figure 8 This is a schematic diagram of the structure of an electronic device provided according to an embodiment of this application. Detailed Implementation

[0024] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0025] The following describes, with reference to the accompanying drawings, an embodiment of the chemical plant-level CCUS-EOR low-carbon retrofit optimization method of this application. Addressing the problems mentioned in the background art, such as the inability to achieve individualized emission reduction assessment and precise screening for chemical plants, the inability to dynamically track and rationally allocate reservoir resources, and the resulting reduction in the accuracy and rationality of low-carbon retrofit planning for chemical plants, this application provides a chemical plant-level CCUS-EOR low-carbon retrofit optimization method. In this method, based on the set of plant-level emission sources of chemical plants in the target area, the baseline emissions of each chemical plant are determined. Combined with the industry capture rate, the amount of CO2 that can be captured is calculated. Based on this, the annual EOR injection demand and the full life-cycle storage demand are determined. A dual-constraint matching of annual injection capacity and full life-cycle storage capacity is performed to screen feasible CCUS-EOR paths. Based on a unified cost caliber, the annual target retrofit path for each chemical plant is determined. Chemical plants with selected CCUS-EOR paths are locked in. The remaining annual EOR injection capacity, remaining full life-cycle storage capacity, and the path locking status of each plant are updated annually, achieving dynamic optimization of low-carbon retrofit throughout the entire life-cycle, effectively improving the accuracy and rationality of low-carbon retrofit planning for chemical plants. This solves the problems in related technologies, such as the inability to achieve individualized emission reduction assessment and precise screening for chemical plants, the inability to dynamically track and rationally allocate oil reservoir resources, and the resulting reduction in the accuracy and rationality of low-carbon transformation planning for chemical plants.

[0026] Specifically, Figure 1 This is a schematic flowchart of a chemical plant-level CCUS-EOR low-carbon retrofit optimization method provided in an embodiment of this application.

[0027] like Figure 1 As shown, the chemical plant-level CCUS-EOR low-carbon retrofit optimization method includes the following steps: In step S101, the baseline emissions of each chemical plant are determined based on the set of plant-level emission sources in the target area.

[0028] In this embodiment of the application, the target area is the area that needs to be optimized for low-carbon transformation of the chemical plant.

[0029] It is understood that the embodiments of this application can be based on the set of plant-level emission sources of one or more chemical plants in the target area. For example, the embodiments of this application can read chemical plant-level data, including multi-dimensional basic data of oil refineries, methanol plants, and synthetic ammonia plants, and complete the standardization and regularization to determine the set of plant-level emission sources, determine the baseline emission of each chemical plant, and improve the accuracy of the carbon emission baseline accounting of chemical plants and the pertinence of plant-level emission reduction assessment.

[0030] In this application, the plant-level examples are mainly oil refineries, methanol plants, and synthetic ammonia plants.

[0031] In one embodiment of this application, the baseline emissions of each chemical plant are determined based on the set of plant-level emission sources in the target area. This includes: standardizing the latitude and longitude data, production capacity data, raw material routes, commissioning year, utilization rate, province, and emission data of each chemical plant in the target area and converting them into a unified set of plant-level emission sources; and combining the set of plant-level emission sources with the target industry and raw material routes to determine the baseline emissions of each chemical plant.

[0032] In actual implementation, such as Figure 2 As shown in the embodiments of this application, it can read chemical plant-level data in the corresponding region, including the latitude and longitude, capacity, raw material routes, commissioning year, utilization rate, province, and original emission data of oil refineries, methanol plants, and synthetic ammonia plants, and uniformly convert them into a set of plant-level emission sources:

[0033] in, It represents a chemical plant. This represents the total number of chemical plants included in the decision-making model. Each plant has the following attributes:

[0034] in, and They are latitude and longitude, Industry type For raw material route, For production capacity, For capacity utilization, The year of production. For design lifespan.

[0035] For refineries, emissions are calculated based on crude oil processing capacity, utilization rate, and refinery emission factor:

[0036] For methanol plants and synthetic ammonia plants, emission factors are matched based on their feedstock routes, using either coal-based, gas-based, or oil-based methods.

[0037] in, For the factory In the year The baseline emissions, expressed in Mt CO2 / yr; For the industry Raw material route In the year The emission factor is expressed in tCO2 / t product.

[0038] When the original data already provides the plant-level emissions, this application may use the following correction formula to unify the standards:

[0039] in, As a weight for data credibility; For the factory In the year Measured or statistical baseline emissions; This is the baseline emission calculated based on capacity, emission factors, and capacity utilization rate. When the original emission data is complete and reliable, this is taken as... When reliable measured data is lacking and model estimates are required, take... When both types of data are available but there are differences in their definitions, the one that best represents the data can be chosen. Perform weighted fusion.

[0040] Therefore, the embodiments of this application integrate measured or statistical data with formula-calculated data through confidence weighting, unify the accounting caliber of plant-level baseline emissions, are compatible with emission data from multiple sources, and reduce emission accounting deviations caused by regional average conversion.

[0041] In step S102, the amount of captureable CO2 for each chemical plant is calculated based on the baseline emissions and the target industry capture rate. Based on the amount of captureable CO2, the annual enhanced oil recovery (EOR) injection requirement and the life-cycle sequestration requirement are determined based on the remaining life of the corresponding chemical plant.

[0042] It is understood that the embodiments of this application can use the calibrated benchmark emissions of chemical plants combined with the established CO2 capture rate of the corresponding sub-sectors to calculate the theoretical CO2 capture amount of each chemical plant. Then, based on the capture amount of CO2, the annual EOR injection demand that can be delivered into the reservoir is formed. Then, combined with the remaining design service life of each chemical plant, the total annual external supply CO2 injection demand during the remaining lifespan is calculated and used as a conservative reserve demand for the chemical plant's full life cycle storage capacity, thereby improving the refinement and accuracy of the calculation of EOR injection demand and full life cycle storage demand.

[0043] For example, firstly, such as Figure 2 As shown, this embodiment of the application can read raster or vector data of EOR annual injection capacity and EOR cumulative sealed capacity, and combine this data with the block boundaries, reservoir number, or spatial connectivity of the target EOR reservoir to identify the affiliation of raster cells or vector units. Each raster cell or vector unit is converted into a point feature resource unit with a unique target EOR reservoir identifier, so that each point feature resource unit uniquely belongs to one target EOR reservoir, rather than treating each point feature as an independent EOR reservoir.

[0044] Define the target EOR reservoir set as:

[0045] The unique mapping relationship between resource units and target EOR reservoirs is defined as follows:

[0046] in, Representing resource units The only one belonging to the target EOR reservoir .

[0047]

[0048]

[0049]

[0050] in, This indicates that it belongs to the target EOR reservoir. The annual set of injection capability points; This indicates that it belongs to the target EOR reservoir. The set of points representing the total lifecycle storage capacity. Any annual injection capacity point or storage capacity point can only belong to one target EOR reservoir. The meaning of the raster value's capacity is determined based on the data caliber of the original data. When the original raster value represents the annual injection capacity or storage capacity per unit area, the annual injection capacity or storage capacity of the point element resource unit is calculated based on the effective area of ​​the corresponding raster cell; when the original raster value represents the annual injection capacity or storage capacity of a single raster cell, it is directly used as the resource quantity of the corresponding point element resource unit; when the original data represents the overall annual injection capacity or overall cumulative storage capacity of the target EOR reservoir, the overall capacity or capacity is not repeatedly assigned to each point element resource unit belonging to the target EOR reservoir, but is retained once at the target EOR reservoir level, or allocated to the corresponding point element resource units according to normalized weights.

[0051]

[0052] in, Indicates annual injection capacity points In the year Maximum available annual injection capacity Indicates the target EOR reservoir In the year Overall annual injection capacity; Indicates the storage capacity point The initial storage capacity, Indicates the target EOR reservoir The total cumulative storage capacity.

[0053] For any resource unit Record its geographical location, the target EOR reservoir identifier, initial available capacity or volume, and remaining available capacity or volume:

[0054] Annual available injection capacity is updated based on the operational status of the target EOR reservoir in each planned year. Target EOR reservoir In the year The remaining annual injection capacity is:

[0055] in, For the target EOR reservoir In the year The maximum available annual injection capacity can be determined based on reservoir pressure, permeability, number of injection wells, historical cumulative injection volume, recovery volume and operating status, or obtained from an annual injection capacity sequence formed by external reservoir evaluation data. For chemical plant In the year Allocation to target EOR reservoir The annual CO2 injection volume.

[0056] The total lifecycle storage capacity is updated yearly using a method of "reserving upon initial locking and releasing upon path interruption." For any given storage capacity point... Its remaining full lifecycle storage capacity before the start of the planning period is:

[0057] in, The starting year of the planning period. For the storage capacity point The initial full lifecycle storage capacity.

[0058] Storage capacity points In the year The remaining full lifecycle storage capacity is calculated using the following formula:

[0059] in, Indicates a chemical plant In the year When initially locking the CCUS-EOR path, the archived capacity point is... Additional full lifecycle storage capacity reserve; Indicates a chemical plant In the year Unused archived capacity released due to CCUS-EOR path interruption.

[0060] The newly reserved storage capacity is only included when the chemical plant first locks in the CCUS-EOR path; for chemical plants that have already reserved storage capacity in the previous planning year, the newly reserved storage capacity in subsequent years is zero. When it is not permissible to interrupt the project to release unused reserved storage capacity, let:

[0061] The remaining full-lifecycle storage capacity of the storage capacity point satisfies:

[0062] The actual annual net geological sequestration volume of a chemical plant is recorded and accumulated within the scope of its reserved full life cycle sequestration capacity, and is not deducted repeatedly from the remaining full life cycle sequestration capacity.

[0063] To ensure the accuracy of spatial distance calculations, the spatial coordinates of the chemical plant and the target EOR reservoir were unified to the same geodetic datum and geographic coordinate reference system, and the source-sink distance between them was calculated using geodetic distance based on the reference ellipsoid. Chemical Plant With the target EOR reservoir The distance between them is:

[0064] in, and Chemical plants Longitude and latitude; and The target EOR reservoirs are respectively Longitude and latitude; This indicates that the geodetic distance between two points is calculated based on a reference ellipsoid, and the output unit is meters. The unit is km.

[0065] To simultaneously accommodate both fixed and dynamic search radii, a chemical plant is defined. In the year For the target object The spatial reachability indicator variable is:

[0066] in, Indicates the target EOR reservoir , annual injection capability points Or sealed capacity point ; Indicates a chemical plant With the target object The source-sink distance between them; Indicates a chemical plant In the year The search radius. When the chemical plant... With the target object When the accessibility constraints of the pipeline network are satisfied, it is also possible to... Set to 1.

[0067] When using a fixed search radius, the settings are applied to all chemical plants and planned years:

[0068] in, To preset a fixed search radius; in some embodiments, It can be set to 100 km, 150 km, 200 km, or 300 km; in a preferred embodiment of this application, .

[0069] In this embodiment, EOR injection and storage potential can be converted from GeoTIFF raster to point features, or oilfield blocks, polygonal reservoir units, well sites, or pipeline nodes can be directly used as sink resources. If polygonal reservoir units are used, the distance can be defined as the shortest distance from the plant point to the polygonal boundary or centroid of the reservoir. The specific settings can be made by those skilled in the art and are not specifically limited here.

[0070] Furthermore, such as Figure 2 As shown in the embodiments of this application, the CO2 capture volume, annual injection requirements, and life-cycle storage requirements required for each plant to implement CCUS-EOR retrofit can be calculated based on the plant-level emissions and industry capture rate.

[0071] The industry capture rate is defined as follows:

[0072] In some embodiments, the appropriate CO2 capture rate can be set according to the industry and production process of the chemical plant. For example, oil refineries may use a lower capture rate, while methanol plants and synthetic ammonia plants may use a higher capture rate.

[0073] To prevent chemical plants that have ceased operation from continuing to participate in path matching, define the chemical plant. In the year The lifetime status indicator variable is:

[0074] in, For chemical plant The year of production, Its designed lifespan, The additional optional service life after implementing EOR-related modifications; For chemical plant In the year The previous CCUS-EOR path lock status variable was set to 1 if locked, and 0 otherwise. Chemical plants can only participate in new CCUS-EOR path matching before the end of their original design life; chemical plants that did not lock their CCUS-EOR path before the end of their original design life will not re-enter path matching due to optional life extensions. At that time, the chemical plant In the year It is in an operational state; when At that time, the chemical plant was in the year It will no longer participate in CCUS-EOR path matching, and its output, captureable CO2 amount and corresponding matching amount will all be zero.

[0075] chemical plant In the year The amount of CO2 that can be captured is:

[0076] in, For chemical plant In the year The baseline CO2 emissions, This corresponds to the CO2 capture rate. The amount of CO2 that can be captured after taking into account the lifespan of the chemical plant.

[0077] In one embodiment of this application, the source-sink matching stage does not separately consider CO2 transport losses and losses after receiving the target EOR reservoir but before injection, and includes the chemical plant In the year The amount of captureable CO2 is used as the annual external supply CO2 injection demand for the EOR reservoir, which is intended to be the actual target for injection:

[0078] in, Indicates a chemical plant In the year The proposed annual external supply of CO2 to be provided and injected into the target EOR reservoir; Indicates a chemical plant In the year The amount of CO2 that can be captured.

[0079] The annual EOR injection demand is used to match the annual injection capacity of the target EOR reservoir and does not represent the total injection plan of the target EOR reservoir, including CO2 recirculation injection. The CO2 recirculated after separation of produced gas within the target EOR reservoir does not belong to the new external supply of the chemical plant and is not included in the annual EOR injection demand.

[0080] chemical plant The remaining lifespan after implementing the EOR modification is:

[0081] in, For chemical plant The year of production, For design life, This refers to the additional optional service life added after implementing the EOR (Enhanced Recovery After Modification) upgrade. When At that time, the chemical plant did not participate in the year. CCUS-EOR path matching.

[0082] To ensure sufficient long-term capacity for the target EOR reservoir after the chemical plant locks in the CCUS-EOR pathway, this application uses the sum of the actual external CO2 injection requirements for the target EOR reservoir in each year of the chemical plant's remaining lifespan as a conservative upper limit for its life-cycle storage capacity. From the year The full lifecycle storage requirements are as follows:

[0083] in, Indicates a chemical plant Consider the year of termination of operation after the CCUS-EOR path has been locked and the optional life extension period has been set; Indicates a chemical plant In the year The proposed external CO2 injection demand for the target EOR reservoir; Indicates a chemical plant From the year The upper limit of the total lifecycle storage capacity that needs to be reserved.

[0084] The full life-cycle storage requirement is a conservative pre-allocation for the target EOR reservoir capacity and is not equivalent to the actual cumulative net geological reserves ultimately formed by the chemical plant during its remaining lifespan. The actual net geological reserves are determined based on the actual external CO2 injections in each year, minus the CO2 injections that do not result in new net geological reserves.

[0085] During normal operation of a chemical plant, the actual cumulative net geological reserves shall not exceed its reserved full lifecycle reserves capacity. If the actual cumulative net geological reserves are lower than the reserved capacity due to post-injection venting, leakage, transfer losses, or other circumstances that do not result in new net geological reserves, the remaining portion shall continue to be considered as the reserved capacity of the chemical plant. When the CCUS-EOR path is interrupted and the release of unused reserved capacity is permitted, the corresponding unused capacity shall be restored to the remaining reserves capacity of the target EOR reservoir in accordance with the release rules described below.

[0086] The CO2 reinjected into the target EOR reservoir through internal circulation is not considered as new external CO2 supply from the chemical plant, is not included in the full life cycle storage requirement, and is not counted twice in the actual net geological storage.

[0087]

[0088] in, For chemical plant In the year The actual net geological reserves.

[0089] It should be noted that the CCUS-EOR in this application embodiment is an emission reduction path that transports captured CO2 to the EOR reservoir to improve recovery and achieve geological sequestration.

[0090] In step S103, the annual EOR injection demand and life-cycle storage demand of the chemical plant are bound and matched with the annual injection capacity and cumulative storage capacity of the same target EOR reservoir to obtain the CCUS-EOR path that meets the matching conditions. Based on a unified cost caliber, the target transformation path for each chemical plant in each year is determined. The path is locked for the chemical plants with selected CCUS-EOR paths, and the remaining EOR injection capacity, remaining storage capacity and path locking status of each chemical plant in the target area are updated year by year to optimize the life-cycle low-carbon transformation path for each chemical plant.

[0091] It is understood that, within a preset search radius, this application's embodiments perform dual-constraint matching between the annual EOR injection demand and the full lifecycle storage demand of a chemical plant and the annual injection capacity and full lifecycle storage capacity of the same target EOR reservoir. During the matching process, both the annual injection demand and the full lifecycle storage demand are bound to the same target EOR reservoir to ensure that the CO2 injection volume and storage capacity reserve corresponding to the same chemical plant are bound to the same target EOR reservoir, avoiding cross-reservoir splitting of annual injection capacity and storage capacity matching. When both the annual injection capacity constraint and the full lifecycle storage capacity constraint are met, the corresponding source-sink matching scheme is determined as a feasible CCUS-EOR path. Subsequently, under a unified cost accounting standard, the CCUS-EOR path is compared economically with alternative paths such as green hydrogen substitution, CCU, and biomass modification, and the annual target modification path for each chemical plant is determined by combining path feasibility, resource constraints, and the existing path locking status. For chemical plants that ultimately select the CCUS-EOR route, a route locking operation is performed, submitting the annual injection capacity allocation results for the corresponding target EOR reservoir, and reserving corresponding storage capacity according to the chemical plant's full lifecycle storage requirements. The annual injection capacity is deducted based on the actual allocation results within the same planning year, and the allocated annual injection capacity is not reassigned to other chemical plants. At the start of the next planning year, it is re-initialized based on the maximum available annual injection capacity of the target EOR reservoir for that year, prioritizing the annual injection needs of locked-in chemical plants. The full lifecycle storage capacity is reserved once when the chemical plant first locks in the CCUS-EOR route, and continues to be used in subsequent years without repeated deductions. When the route is interrupted and the release of unused reserved capacity is permitted, the remaining full lifecycle storage capacity of the target EOR reservoir is restored according to the corresponding release amount. The system updates the remaining annual injection capacity, remaining full lifecycle storage capacity, and route locking status of each target EOR reservoir annually, relying on dynamic resource iteration to complete the optimization of the full lifecycle low-carbon transformation route.

[0092] In one embodiment of this application, within a preset search radius, based on the chemical plant In the year The annual EOR injection demand and lifecycle storage demand, as well as the target EOR reservoir. In the year The remaining annual injection capacity and remaining life-cycle storage capacity are used to perform dual-constraint matching between the chemical plant and the target EOR reservoir. Specifically, the annual injection capacity matching rate and the life-cycle storage capacity matching rate are calculated respectively. When the annual injection capacity matching rate is greater than or equal to the preset injection threshold and the life-cycle storage capacity matching rate is greater than or equal to the preset storage threshold, the source-sink matching relationship between the chemical plant and the target EOR reservoir is determined as a CCUS-EOR path that meets the conditions.

[0093] As one possible way to achieve this, such as Figure 2 As shown, this embodiment of the application can pre-compile the classification and unified spatial coordinate conversion of EOR sink resources across the entire region. Based on the annual EOR injection demand and full life cycle storage demand determined by each chemical plant, corresponding to the remaining annual injection capacity and remaining full life cycle storage capacity of the reservoir, the matching rate of annual injection capacity and the matching rate of full life cycle storage capacity are calculated. The two matching rates are verified simultaneously. Only when the annual injection capacity matching rate is not lower than a preset injection threshold and the full life cycle storage capacity matching rate is not lower than a preset storage threshold is it determined that the chemical plant and the corresponding target EOR reservoir meet the matching conditions, and a feasible CCUS-EOR path is selected. Therefore, this embodiment of the application can improve the rationality of CCUS-EOR source-sink matching results and the feasibility of project implementation through the dual constraints of annual injection capacity and full life cycle storage capacity.

[0094] For example, in this application embodiment, to avoid overly stringent feasibility judgment due to minor matching errors, this application introduces a matching satisfaction threshold. : The expression for the annual injection capability matching rate is:

[0095] in, Indicates a chemical plant. Indicates the target EOR reservoir. Indicates the year. This indicates that it belongs to the target EOR reservoir. The annual set of injected capability points, Indicates a chemical plant In the year Annual EOR injection requirements, Indicates a chemical plant In the year Allocate to annual injection capacity points The amount of CO2 injected.

[0096] The expression for the full lifecycle storage capacity matching rate is:

[0097] in, Indicates belonging to the same target EOR reservoir The set of storage capacity points throughout the entire lifecycle; This indicates the total lifecycle storage capacity points; Indicates a chemical plant From the year The entire lifecycle of storage needs; Indicates a chemical plant In the year For the sealed capacity point The newly added full lifecycle storage capacity reservation amount; in the specific trial allocation, resource submission and year-end rollover process described later, the newly added reservation amount is recorded as ,Right now:

[0098] The annual injection capacity matching and the full life cycle storage capacity matching adopt the same target EOR reservoir. This ensures that the chemical plant's annual EOR injection needs and full lifecycle storage needs are tied to the same target EOR reservoir.

[0099] when and At that time, the chemical plant was identified. In the year With the target EOR reservoir The two constraints between them satisfy the double-constraint matching condition for the newly created CCUS-EOR path. This is a preset numerical tolerance used to eliminate floating-point operation errors. In addition to this numerical tolerance, the chemical plant's annual EOR injection requirements and full lifecycle storage requirements must all be met; otherwise, the corresponding CCUS-EOR path is deemed infeasible.

[0100] Figure 3 shows a schematic diagram of EOR source-sink dual-constraint matching, illustrating the emission sources of chemical plants in the year. search radius The process of matching annual injection capacity constraints and life-cycle storage capacity constraints with the target EOR reservoir. Figure 3 With a fixed search radius The following example illustrates the process; in the embodiment using a dynamic search radius, the search range varies according to the chemical plant and the year. For the same chemical plant, its annual EOR injection demand and full lifecycle storage demand are matched to the same target EOR reservoir; whereby, annual injection capacity and storage capacity are verified as two resource attributes of the target EOR reservoir. In Figure 3, the solid line represents the annual injection capacity allocation relationship between the chemical plant and the target EOR reservoir, and the dashed line represents the full lifecycle storage capacity reservation relationship under the same matching relationship. The annual injection capacity is dynamically updated year by year, while the storage capacity is reserved and deducted according to the full lifecycle demand when the path is locked. Only when the same target EOR reservoir simultaneously meets the annual injection capacity constraint and the full lifecycle storage capacity constraint is the source-sink matching relationship determined as a feasible CCUS-EOR path. It should be noted that the fixed search radius can be adjusted according to terrain conditions, pipeline construction conditions, regional policies, or economic requirements. The search radius can be set to 100 km, 150 km, 200 km, or 300 km; alternatively, a dynamic search radius that varies depending on the chemical plant and the planning year can be used. .

[0101] When using a dynamic search radius, chemical plants In the year search radius It can be represented as:

[0102] in, For chemical plant In the year The dynamic search radius; Used as the baseline search radius; For chemical plant In the year The baseline emissions; A reference emission level having the same units as the baseline emission level; For the year The cost of CO2 transportation per unit mass and per unit distance; A reference transportation cost having the same unit as the aforementioned unit transportation cost; and This is a radius adjustment parameter, in km. and These represent the lower and upper limits of the dynamic search radius, respectively. Therefore, regardless of whether a fixed or dynamic search radius is used, the spatial accessibility of subsequent candidate EOR reservoirs, annual injection capacity points, and storage capacity points is determined by indicator variables with year indexes. Make a judgment.

[0103] in,

[0104] The larger the baseline emission scale of a chemical plant, the larger its acceptable search radius; the higher the unit transportation cost, the smaller its acceptable search radius; by setting upper and lower limits for the search radius, we can avoid the dynamic search radius from becoming negative or exceeding the preset spatial range.

[0105] like Figure 4 The diagram shown is a cross-year EOR resource state transition diagram, illustrating the recursive relationship between established EOR projects, newly established EOR projects, interrupted EOR projects, and remaining EOR potential. Figure 4 This explains why existing projects are prioritized for Injection allocation, while new projects must satisfy both Injection and Storage constraints.

[0106] Specifically, for each planning year In this embodiment, EOR reservoir resources are allocated according to the rule of "existing EOR projects take priority, and newly built EOR projects participate in the competition subsequently". EOR matching includes both annual injection capacity constraints and full life cycle storage capacity constraints, and both are bound to the same target EOR reservoir or the same EOR project unit, as detailed below: (1) Screening of candidate EOR reservoirs For any chemical plant and target EOR reservoir Before conducting source-sink matching, the spatial accessibility between the two, the CO2-EOR engineering applicability of the target EOR reservoir, and the availability of remaining resources are determined respectively.

[0107] Define the target EOR reservoir In the year The engineering applicability indicator variables are:

[0108] Among them, when the target EOR reservoir In the year When the geological, injection, and operational conditions required for CO2-EOR implementation are met, ;otherwise, The applicability of the project can be determined based on at least one of the following: pressure, temperature, crude oil properties, permeability, reservoir and caprock integrity, fault conditions, and operating status of the target EOR reservoir, or based on external reservoir evaluation data and existing engineering evaluation results.

[0109] To aggregate point-level resources belonging to the same target EOR reservoir into reservoir-level remaining resources, the target EOR reservoir In the year The remaining annual injection capacity is:

[0110] Target EOR reservoir In the year The remaining full lifecycle storage capacity is:

[0111] in, This belongs to the target EOR reservoir. The annual set of injected capability points, This belongs to the target EOR reservoir. The set of storage capacity points throughout the entire lifecycle; Injecting Capabilities for the Year In the year The remaining annual injection capacity; For the storage capacity point In the year The remaining full lifecycle storage capacity.

[0112] If chemical plant With the target EOR reservoir Satisfying spatial accessibility constraints, the target EOR reservoir In the year If the CO2-EOR engineering suitability constraints are met, and both the remaining annual injection capacity and the remaining lifetime storage capacity are greater than zero, then the target EOR reservoir will be considered. Included in chemical plant In the year Candidate EOR reservoir set:

[0113] in, For chemical plant In the year The candidate EOR reservoir set; This is the set of target EOR reservoirs that can be used for CCUS-EOR matching; Indicates a chemical plant With the target EOR reservoir In the year Satisfy search radius Constraints or network accessibility constraints; Indicates the target EOR reservoir In the year It meets the CO2-EOR engineering applicability constraints.

[0114] like If empty, then it is determined to be a chemical plant. In the year Those that do not meet the CCUS-EOR candidate matching criteria will enter the cost comparison process for green hydrogen substitution, CCU, biomass conversion or other low-carbon conversion pathways.

[0115] It should be noted that during the candidate EOR reservoir screening stage, only spatial accessibility, engineering suitability, and remaining resource availability are assessed; the remaining annual injection capacity and remaining life-cycle storage capacity of the target EOR reservoir are not deducted. Only when the corresponding CCUS-EOR path passes subsequent dual-constraint matching and is selected as a chemical plant... Only after the target modification path is determined can the resources of the corresponding target EOR reservoir be deducted and locked.

[0116] (2) Factory priority ranking For chemical plants whose candidate EOR reservoir set is not empty, the embodiments of this application determine plant priority based on baseline emission scale, CCUS-EOR path-locked status, and spatial accessibility:

[0117] in, For chemical plant In the year Normalized baseline emissions For path lock state variables, Indicates a chemical plant The CCUS-EOR path has been locked, otherwise... ; For chemical plant The normalized minimum distance to its candidate target EOR reservoir; , and The weights are non-negative and satisfy:

[0118] Normalized baseline emissions and normalized minimum distance are respectively:

[0119] in, A very small positive number set to prevent the denominator from being zero; and Years Minimum and maximum baseline emissions among the chemical plants to be ranked; and These are the minimum and maximum values ​​of the corresponding minimum source-sink distances, respectively. The chemical plants are processed in descending order of emissions. Preferably, chemical plants with locked CCUS-EOR pathways are processed first, and then new candidate chemical plants are processed in descending order of baseline emissions.

[0120] (3) Annual injection capacity allocation Annual injection capacity is allocated to each chemical plant in descending order of priority. For chemical plants that have secured a CCUS-EOR pathway, annual injection capacity is allocated only within their secured target EOR reservoirs. For chemical plants that have not yet secured a CCUS-EOR pathway, trial allocation is conducted for each target EOR reservoir in the candidate EOR reservoir set, and the annual injection capacity of different target EOR reservoirs is not combined to meet the annual injection needs of the same chemical plant.

[0121] For chemical plants and candidate target EOR reservoirs Determine the set of annual injection capacity points that belong to the target EOR reservoir and satisfy the spatial accessibility constraints:

[0122] in, This belongs to the target EOR reservoir. The annual set of injection capability points; For chemical plant In the year For the target EOR reservoir The set of available annual injection capability points; As a spatial accessibility indicator variable, representing a chemical plant With annual injection capacity points In the year Does it meet the search radius requirement? Constraints or network accessibility constraints; Injecting Capabilities for the Year In the year The remaining annual injection capacity.

[0123] like If empty, then it is determined to be a chemical plant. With the target EOR reservoir In the year The candidate allocation criteria for annual injection capacity are not met. If not empty, sort by the distance between the chemical plant and the injection capacity point for each year, from nearest to farthest:

[0124] in, For chemical plant With annual injection capacity points The source-sink distance between them; For the sorted number One annual injection capacity point.

[0125] Target EOR reservoir During the trial distribution, the chemical plant The initial remaining year injection requirements are:

[0126] in, For chemical plant In the year The annual EOR injection requirement.

[0127] Before the trial allocation begins, the current remaining annual injection capacity of each annual injection capacity point is copied as a temporary state variable:

[0128] No. The temporary allocation of annual injection capacity points is:

[0129] in, This indicates that the target EOR reservoir is being targeted. During the trial distribution process, the chemical plant In the year Temporarily allocated to annual injection capacity points The annual CO2 injection volume.

[0130] Complete the first Following the trial allocation of annual injection capacity points, the chemical plant's temporary remaining annual injection demand is updated as follows:

[0131] The temporary remaining annual injection capacity for the corresponding annual injection capacity points is updated as follows:

[0132] when At that time, stop targeting the EOR reservoir. Annual injection capacity trial allocation; even after all available annual injection capacity points have been allocated, there are still [unclear - possibly referring to a specific situation or requirement]. At that time, retain the current trial allocation results and calculate the annual injection capacity matching rate based on its actual allocation amount.

[0133] chemical plant With the target EOR reservoir The total amount of temporary annual injection allocation between them is:

[0134] Annual injection capability matching rate:

[0135] in, The trial allocation process satisfies:

[0136] During the aforementioned trial allocation process, only the temporary remaining annual injection capacity is updated; the actual remaining annual injection capacity of the target EOR reservoir is not directly modified. For different candidate target EOR reservoirs, trial allocation is conducted independently using the current actual remaining annual injection capacity as the initial value.

[0137] When chemical plant With the target EOR reservoir If the annual injection capacity matching rate between the two sources is greater than or equal to the first preset threshold, and the full lifecycle sealing capacity matching rate is greater than or equal to the second preset threshold, the source-sink matching relationship will be used as a candidate CCUS-EOR path for subsequent cost comparison.

[0138] When the candidate CCUS-EOR path is ultimately selected as the chemical plant The target modification path, and the corresponding target EOR reservoir is At that time, submit the provisional annual injection allocation results for the target EOR reservoir:

[0139] And officially update the remaining annual injection capacity for the corresponding annual injection capacity points:

[0140] For candidate EOR reservoirs that were not selected, their provisional allocation results are discarded, and the corresponding actual remaining annual injection capacity is not updated. (If the chemical plant...) If none of the candidate CCUS-EOR paths pass the double constraint check or are selected in the cost ratio selection, all temporary allocation results are discarded, and the actual remaining annual injection capacity of the target EOR reservoir remains unchanged.

[0141] (4) Allocation of storage capacity throughout the entire life cycle For chemical plants that have not yet secured a CCUS-EOR pathway, this application embodiment further conducts a full lifecycle sequestration capacity trial allocation for target EOR reservoirs that meet the annual injection capacity candidate matching conditions. For any chemical plant Candidate target EOR reservoirs and planning year It was determined to belong to the target EOR reservoir. And the set of storage capacity points with remaining storage capacity:

[0142] in, It belongs to the target EOR reservoir The set of storage capacity points; For chemical plant In the year Targeting EOR reservoirs The set of available storage capacity points; As a spatial accessibility indicator variable, representing a chemical plant With storage capacity point In the year Does it meet the search radius requirement? Constraints or network accessibility constraints; For the storage capacity point In the year The remaining full lifecycle storage capacity.

[0143] like If empty, then it is determined to be a chemical plant. With the target EOR reservoir The candidate matching conditions for the full lifecycle storage capacity are not met. If If not empty, sort by distance from the chemical plant to each storage capacity point, from closest to furthest:

[0144] in, For chemical plant With storage capacity point The source-sink distance between them; For the sorted number One storage capacity point.

[0145] Targeting EOR reservoirs During the trial distribution, the chemical plant The initial remaining full lifecycle sequestration requirement is:

[0146] in, For chemical plant From the year The need for full lifecycle sealing.

[0147] Before the trial allocation begins, the actual remaining sealed capacity of each sealed capacity point is copied as a temporary state variable:

[0148] No. The temporary additional reserve for each sealed capacity point is:

[0149] in, This indicates that the target EOR reservoir is being targeted. During the trial distribution process, the chemical plant In the year For the sealed capacity point Temporary additional full lifecycle storage capacity reserve.

[0150] Complete the first After the trial allocation of the storage capacity points, the temporary remaining full lifecycle storage demand is updated as follows:

[0151] The temporary remaining storage capacity at the corresponding storage capacity point is updated as follows:

[0152] when At that time, stop targeting the EOR reservoir. Trial allocation of sealed capacity; after all available sealed capacity points have completed the trial allocation, there are still... At that time, the full life cycle storage capacity matching rate is calculated based on the actual trial allocation.

[0153] chemical plant With the target EOR reservoir The total temporary full lifecycle storage capacity reserved between them is:

[0154] The full lifecycle storage capacity matching rate is:

[0155] in, The trial allocation process satisfies:

[0156] During the aforementioned trial allocation process, only the temporary remaining storage capacity is updated; the actual remaining full lifecycle storage capacity of each storage capacity point is not directly modified. For different candidate target EOR reservoirs, trial allocation is carried out independently with the current actual remaining storage capacity as the initial value. The storage capacity of different target EOR reservoirs is not combined to meet the full lifecycle storage needs of the same chemical plant.

[0157] For chemical plants that have already locked in the CCUS-EOR pathway in the previous planning year, their full lifecycle storage capacity has already been reserved in the first year of locking in, and no additional storage capacity will be reserved in subsequent years:

[0158] in, Indicates a chemical plant In the year For the sealed capacity point The newly added full life cycle storage capacity is reserved.

[0159] (5) CCUS-EOR path matching success, locking and interruption determination chemical plant With the target EOR reservoir The conditions for successful double-constraint matching are:

[0160] in, For the annual injection capability matching rate, To achieve full lifecycle storage capacity matching rate; and These are the annual injection capacity matching threshold and the full lifecycle sealing capacity matching threshold, respectively.

[0161] when At that time, the chemical plant With the target EOR reservoir The matching relationship between them was determined as a candidate CCUS-EOR path and participated in the comparison of transformation paths under the unified cost caliber.

[0162] When identifying chemical plants from candidate CCUS-EOR paths In the year When determining the target modification path, the first step is to identify the set of candidate target EOR reservoirs that satisfy the dual-constraint matching condition. :

[0163] For any candidate target EOR reservoir Based on the provisional allocation results obtained during the annual injection capacity test allocation for the target EOR reservoir, the chemical plant was determined. With the target EOR reservoir Weighted average transport distance of temporary injections between:

[0164] in, This indicates that it belongs to the target EOR reservoir. The annual set of injection capability points; This indicates that the target EOR reservoir is being targeted. During the trial distribution process, the chemical plant In the year Temporarily allocated to annual injection capacity points Annual CO2 injection volume; Indicates a chemical plant With annual injection capacity points The source-sink distance between them; Indicates a chemical plant In the year Select target EOR reservoir The weighted average transport distance of the temporary injection volume at that time.

[0165] The full lifecycle storage capacity points are used to determine whether the target EOR reservoir has sufficient full lifecycle storage capacity and to record the reservation and occupancy status of storage capacity. They do not constitute a second CO2 transport destination independent of the actual injection capacity points. Therefore, the transport distance of the candidate CCUS-EOR route is determined only based on the annual injection capacity points actually participating in the injection trial allocation, and the distance of the storage capacity points is not included in the transport distance calculation.

[0166] For any candidate target EOR reservoir that satisfies the double-constraint matching condition Based on the results of the annual injection capacity trial allocation and the full life-cycle storage capacity trial allocation for this candidate reservoir, and according to the CCUS-EOR annual net technical cost accounting method described later, the chemical plant's cost was calculated. In the year Select target EOR reservoir Cost of candidate CCUS-EOR path at that time:

[0167] in, Indicates a chemical plant In the year Select candidate target EOR reservoirs The annual net cost of technology at that time is determined according to the following formula:

[0168] in, For chemical plant In the year CO2 capture cost; To select candidate target EOR reservoirs At that time, the weighted average transport distance based on the temporary injection volume of the candidate reservoir was calculated. Determined CO2 transportation costs; For the target EOR reservoir The corresponding CO2 injection cost; For the target EOR reservoir The corresponding net geological sequestration and monitoring costs; To select target EOR reservoirs The corresponding annualized transformation costs for the source and sink sides at that time; For the target EOR reservoir The corresponding EOR (Earnings Orientation) increases oil yield.

[0169] The transportation cost, injection cost, storage and monitoring cost, stimulation cost, and EOR oil enhancement benefit in the candidate costs are respectively based on the candidate target EOR reservoir. The corresponding provisional allocation results, weighted average distance of actual injection capacity points, unit injection cost, unit net storage and monitoring cost, effective oil increase response coefficient, and capital cost parameters of sink-side modification are calculated using the same caliber as the annual net technical cost of CCUS-EOR described later.

[0170] From the set of candidate target EOR reservoirs that meet the dual-constraint matching conditions, select the target EOR reservoir with the lowest annual net technical cost for the candidate CCUS-EOR path:

[0171] in, For chemical plant In the year A set of candidate target EOR reservoirs that meet the annual injection capacity constraint and the full life cycle storage capacity constraint; For chemical plant In the year Selected target EOR reservoir.

[0172] Selected target EOR reservoir Afterwards, the chemical plant In the year The CCUS-EOR path cost is determined as follows:

[0173] When reservoir-level injection cost, storage cost, or differentiated oil production response data are lacking, the same corresponding parameters can be used for different candidate target EOR reservoirs. In this case, the cost differences of each candidate path are mainly determined by the distance of the actual injection capacity point, the temporary injection allocation combination, and the differences in available sink-side modification costs.

[0174] For locked-in chemical plants that continued to operate during the year, and for newly locked-in chemical plants during the year, submit the temporary annual injection capacity allocation results from the above steps. For the target EOR reservoir... Corresponding annual injection capacity points ,have:

[0175] The actual remaining annual injection capacity for the corresponding annual injection capacity points is updated as follows:

[0176] For belonging to The newly added locked-down chemical plant, and the results of the temporary storage capacity reservation:

[0177] The actual remaining full lifecycle storage capacity of the corresponding storage capacity point is updated as follows:

[0178] For candidate EOR reservoirs that are not selected, their temporary allocation results for annual injection capacity and storage capacity are discarded, and the actual remaining status of the corresponding resources is not updated.

[0179] Storage capacity points up to year The net reserved occupancy meets the following requirements:

[0180] in, For the storage capacity point Initial total lifecycle storage capacity; For chemical plant In the year For the sealed capacity point Additional full lifecycle storage capacity reserve; For chemical plant In the year Unused reserve capacity released due to CCUS-EOR path interruption. The newly added reserve is only counted when the chemical plant first locks the CCUS-EOR path, and the release is only counted when the path is interrupted and the release of unused reserve capacity is permitted.

[0181] Storage capacity points In the year The remaining full lifecycle storage capacity is:

[0182] And satisfy:

[0183] For a chemical plant that has locked in a CCUS-EOR path, the CCUS-EOR path is considered to be interrupted if any of the following situations occur in subsequent years: the annual injection capacity matching rate between the chemical plant and the bound target EOR reservoir is lower than the minimum guarantee threshold; the chemical plant is no longer within its operational lifespan; or the bound target EOR reservoir no longer meets the CO2-EOR engineering suitability conditions.

[0184] Define chemical plant In the year The CCUS-EOR path interruption indicator variable is:

[0185]

[0186] in, Indicates the year up to The set of chemical plants that have been identified along the CCUS-EOR path; Indicates a chemical plant The target EOR reservoir has been locked and bound; Indicates a chemical plant In the year Annual injection capacity matching rate with the already bound target EOR reservoir; This indicates that the minimum annual injection capacity guarantee threshold for the CCUS-EOR path has been locked. Indicates a chemical plant In the year Lifespan status indicator variable; This indicates that the bound target EOR reservoir was in the year CO2-EOR engineering applicability indicator variable.

[0187] when At that time, it was determined that the chemical plant In the year The CCUS-EOR path is interrupted; when At that time, the chemical plant continued to maintain the original CCUS-EOR path and bound it to the original target EOR reservoir.

[0188] The set of chemical plants where the CCUS-EOR path interruption occurred is as follows:

[0189] Since the full lifecycle storage capacity has been reserved when the path is first locked, insufficient remaining storage capacity will no longer be considered a subsequent interruption condition for the locked CCUS-EOR path. For chemical plants experiencing path interruption, their reserved storage capacity that has not yet been actually used can be released in accordance with the storage capacity release rules described later.

[0190] If projects experiencing disruptions are permitted to release unused reserved storage capacity, the chemical plant's capacity should first be determined based on the annual CO2 quality balance. In the year For the sealed capacity point Annual net geological reserves:

[0191] in, Indicates a chemical plant In the year The actual CO2 injected into the externally supplied oil reservoir of its target EOR reservoir is allocated to the storage capacity points according to the storage capacity allocation. The amount of CO2. For chemical plants. In the year The target EOR reservoir is bound to the target. ,satisfy:

[0192] in, For chemical plant In the year The total amount of externally supplied CO2 actually injected into the target EOR reservoir.

[0193] This indicates that after the externally supplied CO2 is actually injected into the target EOR reservoir, no new net geological sequestration of CO2 is formed, including at least one of the following: venting volume, leakage volume, and transfer loss, and satisfying the following conditions:

[0194] In this embodiment, CO2 transport losses and losses after receiving the target EOR reservoir and before injection are not considered separately. This only indicates that after the actual injection of externally supplied CO2 into the target EOR reservoir, no new net geological reserves were formed and attributed to the reserves capacity point. The CO2 volume. The CO2 reinjected into the target EOR reservoir's internal circulation is not considered new external CO2 supply from the chemical plant and is therefore not included in the calculation. It is also not counted repeatedly as newly added net geological reserves.

[0195] chemical plant up to year At the sealed capacity point The cumulative net geological reserves are calculated using the following formula:

[0196] in:

[0197] And the cumulative net geological reserves meet the following requirements:

[0198] in, For chemical plant The year the CCUS-EOR path was first locked; For chemical plant When first locking the CCUS-EOR path at the archive capacity point Reserved storage capacity throughout the entire life cycle.

[0199] Only when chemical plants Belongs to the year Interruption of chemical plant collection At that time, it was at the sealed capacity point The amount of unused reserved capacity that can be released is:

[0200] in, This is an interrupt status indication function; when the chemical plant... In the year A value of 1 is used when a path interruption occurs, otherwise a value of 0 is used; the release amount must not be less than zero, and must not exceed the reserved capacity of the chemical plant at the corresponding storage capacity point that has not yet been actually used; for chemical plants that have not experienced an interruption, .

[0201] The remaining full lifecycle storage capacity of the corresponding storage capacity point is updated as follows:

[0202] CCUS-EOR path lock set updated to:

[0203] For locked chemical plants that have not experienced any interruption, they will continue to be bound to the original target EOR reservoir in subsequent years and will no longer participate in the rematching of other target EOR reservoirs or other low-carbon transformation paths.

[0204] (6) Matching result record For each chemical plant, this application outputs the annual EOR injection volume, actual transport weighted average distance, new full life cycle storage capacity reserve, annual actual net storage volume, and matching details.

[0205] chemical plant In the year The annual EOR injection amount is:

[0206] chemical plant In the year The actual weighted average transport distance is:

[0207] in, For chemical plant In the year Selected and bound target EOR reservoir; This is the set of annual injection capacity points belonging to the target EOR reservoir; For chemical plant In the year Allocate to annual injection capacity points Annual CO2 injection volume; For chemical plant Up to annual injection capacity points The distance between the source and the sink.

[0208] chemical plant In the year The newly added full lifecycle storage capacity reserve is:

[0209] chemical plant In the year The actual net amount of inventory seized in the current year is:

[0210] in, This is the set of storage capacity points belonging to the target EOR reservoir; For chemical plant In the year For the sealed capacity point Additional full lifecycle storage capacity reserve; For chemical plant In the year For the sealed capacity point The annual actual net geological sequestration volume. The newly added sequestration capacity reserve is part of the capacity occupancy record, is not included in the annual CO2 transport volume, and is not calculated separately for transport distance.

[0211] Annual injection matching details can be recorded as follows:

[0212] The details of the sealed capacity can be recorded as follows:

[0213] Furthermore, embodiments of this application can calculate the annual technical cost, unit product cost, and unit emission reduction cost for each chemical plant implementing CCUS-EOR retrofitting based on the source-sink matching results. For example... Figure 5 As shown, the CCUS-EOR path cost includes CO2 capture cost, transportation cost, injection cost, storage and monitoring cost, and modification capital cost, minus the EOR fuel gain.

[0214] To avoid double-charging for CO2 that was not actually transported, injected, or stored, separate definitions are provided for each chemical plant. In the year The captureable CO2 volume, actual transport volume, target EOR reservoir reception volume, actual injection volume, and actual net geological reserves are as follows:

[0215] in, For chemical plant In the year The amount of CO2 that can be captured; This refers to the actual volume of CO2 transported into the CO2 transport system. The amount of CO2 received at the receiver of the target EOR reservoir; The amount of externally supplied CO2 actually injected into the target EOR reservoir; The actual net geological reserves are the amount of CO2 that does not result in new net geological reserves after injection.

[0216] In one embodiment of this application, CO2 transportation losses and losses after receiving the target EOR reservoir and before injection are not considered separately during the source-sink matching and cost accounting process. Therefore:

[0217] When chemical plant In the year When the annual EOR injection demand is met through annual injection capacity allocation, the amount of externally supplied CO2 allocated to the selected target EOR reservoir is:

[0218] and:

[0219] The annual injection capacity matching threshold is taken as follows In the embodiments, there are:

[0220] in, Set a threshold for annual injection capacity. This is a preset tolerance used to eliminate numerical calculation errors.

[0221] chemical plant In the year The actual net geological reserves are:

[0222] in, Indicates a chemical plant In the year No new net geological sequestration of CO2 was formed after the actual injection into the target EOR reservoir. (For chemical plants) In the year Selected and bound target EOR reservoir The total amount of CO2 that has not formed new net geological reserves at the plant level is determined by summing up the amount of new net geological reserves corresponding to each reserves capacity point:

[0223] chemical plant In the year The actual external CO2 supply injected into the target EOR reservoir satisfies:

[0224] Therefore, chemical plants In the year The actual net geological reserves at the plant level are the sum of the annual net geological reserves at each reserve capacity point:

[0225] in, This indicates that it belongs to a chemical plant. In the year Selected target EOR reservoir The set of storage capacity points; Indicates allocation to the storage capacity point External CO2 injection volume; This indicates the amount of CO2 injected that did not result in any new net geological sequestration. Indicates the storage capacity point The corresponding annual net geological reserves.

[0226] For chemical plants The cost of CO2 capture is:

[0227] in, For chemical plant Industry In the year The cost of CO2 capture per unit.

[0228] CO2 transportation costs are calculated based on the actual volume and distance transported.

[0229] in, For the year The cost of CO2 transportation per unit mass and per unit distance; For chemical plant Weighted average transport distance of injection volume to each actual injection capacity point in the selected target EOR reservoir:

[0230] in, For chemical plant In the year Selected and bound target EOR reservoir.

[0231] The sealed capacity points throughout their entire lifecycle are used for capacity reservation and resource accounting, and do not constitute a second CO2 transportation destination independent of the actual injection points. Therefore, the CO2 transportation distance is calculated based on the actual injection capacity points, and the distance between sealed capacity points and injection capacity points is no longer weighted and combined.

[0232] The injection cost for the target EOR reservoir is:

[0233] The actual net cost of geological sequestration and monitoring is:

[0234] in, Operating cost per unit of CO2 injection for the selected target EOR reservoir; The cost of monitoring, verification, and long-term management per unit of net CO2 sequestration.

[0235] The EOR (Enhanced Oil Retention) revenue is calculated based on the actual injection volume of the target EOR reservoir and the effective oil recovery response coefficient:

[0236] in, For the selected target EOR reservoir in the year The effective increase in oil production corresponding to a unit external CO2 injection volume, in units of ; For the year Oil prices.

[0237] The effective oil enhancement response coefficient can be determined based on at least one of the following factors of the target EOR reservoir: crude oil properties, formation pressure, permeability, water cut, injection-production well pattern, injection stage, miscibility conditions, water-gas alternating injection method, and cyclic reinjection operation status; or it can be obtained based on the results of external reservoir engineering evaluation. When differentiated reservoir engineering data is lacking, a preset unit CO2 oil enhancement coefficient can be used for approximate calculation.

[0238] The capital cost of CCUS-EOR retrofitting includes both source-side retrofitting of the chemical plant and sink-side retrofitting of the target EOR reservoir. Source-side retrofitting capital costs include the costs of trapping equipment, compression equipment, access pipelines, and station retrofitting; sink-side retrofitting capital costs include at least one of the following: new or modified injection wells, wellhead and gathering facilities, circulating gas recovery and recompression facilities, water-gas alternating injection facilities, and monitoring facilities.

[0239] When the sink side facilities of the target EOR reservoir are shared by multiple chemical plants, the chemical plants In the year For the target EOR reservoir The cost-of-capital allocation ratio is as follows:

[0240] chemical plant In the year The annualized renovation cost is:

[0241] in, Capital costs for source-side modifications at chemical plants; Capital cost of reservoir sinkside stimulation for target EOR; and These are the annual fixed operation and maintenance rates for source-side and sink-side facilities, respectively, expressed as an annual percentage of capital costs.

[0242] The capital recovery factor is:

[0243] in, The discount rate is... The economic lifespan of the corresponding equipment.

[0244] Variable energy and operating costs included in unit capture costs, transportation costs, injection costs, and storage costs will no longer be included in the aforementioned annual fixed operation and maintenance rate to avoid double counting of operation and maintenance costs.

[0245] chemical plant In the year The annual net technology cost of CCUS-EOR is:

[0246] To account for the additional emissions generated by the entire CCUS-EOR chain operation, the chemical plant is defined. In the year The total additional emissions across the entire chain are:

[0247]

[0248] in, The emission factor corresponding to the steam, electricity or fuel consumed per unit of CO2 capture; The emission factor corresponding to CO2 compression; The transport emission factor per unit mass and per unit transport distance; Inject the corresponding energy consumption emission factor for each unit of CO2; The emission factor corresponding to recirculated gas recovery and recompression; Other on-site additional emissions that have not yet been deducted from the actual net sequestration.

[0249] For those already included And by reducing the actual net geological reserves The venting volume, leakage volume, and transfer loss reflected after injection will not be repeatedly included in the total additional emissions for the entire chain. .

[0250] chemical plant In the year The remaining emissions after adopting the CCUS-EOR pathway are:

[0251] in, This represents the baseline CO2 emissions of the chemical plant before implementing the CCUS-EOR retrofit. Therefore, the actual emission reductions through the CCUS-EOR pathway are:

[0252] This calculation method takes into account both the actual net stockpile and the additional emissions from capture, compression, transport, injection and recycling, avoiding overestimation of actual emission reductions based solely on nominal capture rates.

[0253] The annual carbon price cost for chemical plants adopting the CCUS-EOR pathway is:

[0254] The total annual cost including carbon pricing is:

[0255] For the renovation of existing chemical plants, the original main production equipment is considered a sunk cost, and the benchmark production cost is not included in the new renovation capital expenditure. In the year The product output is:

[0256] in, For the chemical plant's production capacity, For the year capacity utilization rate This is a lifetime status indicator variable.

[0257] The unit product technology cost of CCUS-EOR excluding carbon price is:

[0258] The total unit product cost of CCUS-EOR including carbon price is:

[0259] chemical plant In the year The baseline unit product emissions are:

[0260] The unit product emissions after adopting the CCUS-EOR pathway are:

[0261] The unit emission reduction cost of the CCUS-EOR path is:

[0262] Among them, only if:

[0263] The unit emission reduction cost is calculated at the time; if the CCUS-EOR path does not generate a positive net emission reduction, the path will not be included in the set of effective emission reduction paths.

[0264] The unit emission reduction cost is calculated using the technology cost excluding carbon price to avoid double-counting carbon price as both pathway cost and implementation threshold. The total unit product cost including carbon price is used to calculate the actual production cost and pathway implementation status under the carbon price scenario.

[0265] For candidate target EOR reservoirs The aforementioned candidate CCUS-EOR path cost The annual net technical cost can be calculated separately according to the definition in this embodiment, using the weighted average distance of the actual injection capacity point corresponding to the candidate reservoir, injection cost, storage cost, effective oil production response coefficient, and sink capital cost. The chemical plant selects the target EOR reservoir with the lowest annual net technical cost from the candidate target EOR reservoirs that meet the dual-constraint matching conditions.

[0266] Optionally, in one embodiment of this application, the target transformation path for each chemical plant in each year is determined based on a unified cost caliber, including: based on a unified cost caliber, the CCUS-EOR path is compared with the green hydrogen replacement, CCU, off-grid green products, and biomass path in terms of cost to obtain the cost competition results; and the target transformation path for each chemical plant in each year is determined based on the cost competition results.

[0267] For example, combining Figure 2 and Figure 6 As shown, where, Figure 6 The competitive structure diagram of plant-level transformation paths shows the cost comparison logic between CCUS-EOR, green hydrogen replacement, CCU, off-grid green products, biomass path and unmodified path. Figure 6 The CCUS-EOR path is connected to the EOR feasibility determination module, indicating that infeasible EOR matching results cannot enter path competition.

[0268] Specifically, this application's embodiments include CCUS-EOR, green hydrogen substitution, CCU, off-grid green methanol or synthetic ammonia, biomass conversion, and non-emission-reduction pathways in a unified comparison. Chemical plants In the year The set of possible modification paths is as follows:

[0269] in, Indicates the CCUS-EOR modification path. Indicating green hydrogen alternative pathways, Indicates the carbon capture and utilization pathway. This indicates an off-grid green methanol or ammonia synthesis pathway. Indicates the pathway of biomass modification. This indicates a path where emissions have not been reduced.

[0270] For each optional modification path, the unit technology cost excluding carbon price is calculated based on the corresponding techno-economic parameters, resource availability, and spatial transportation conditions:

[0271] in, For chemical plant In the year Select path The unit product technology cost excluding carbon costs; For path In the year Technical and economic parameters; For corresponding resource conditions; This refers to the source-sink distance involved in space transportation. The carbon price is not included again in the unit technology cost mentioned above.

[0272] chemical plant In the year Use path The emissions per unit product after that are:

[0273] in, This refers to the unit product emissions under the unreduced emission reduction path. For path The emission reduction rate or emission adjustment parameters. For non-emission reduction paths, we have:

[0274] Based on the technical feasibility and resource constraints of each path, construct a set of effective paths:

[0275] in, As an indicator variable for path feasibility, Indicates a chemical plant In the year Satisfy path Technical conditions and resource constraints, otherwise For the CCUS-EOR path, the feasibility indicator variables are:

[0276] in, For chemical plant In the year A set of candidate target EOR reservoirs that meet the annual injection capacity constraint and the full life-cycle storage capacity constraint. When When not empty, , indicating a chemical plant In the year There exists at least one feasible CCUS-EOR path; when When empty, .

[0277] For green hydrogen substitution, CCU, off-grid green methanol or synthetic ammonia, and biomass conversion pathways, feasibility indicator variables are determined based on the applicability of the corresponding technologies and the availability of resources.

[0278] By removing non-emission-reducing paths and paths with emission reductions not greater than zero from the effective path set, we obtain the effective emission-reduction path set:

[0279] chemical plant In the year Adopt emission reduction path The marginal cost of emission reduction is:

[0280] The marginal cost of emission reduction shall not exceed the annual cost. The carbon price pathway has been identified as an feasible emission reduction path:

[0281] For chemical plants not locked by existing pathways, when When not empty, select the path with the lowest unit technical cost as the target transformation path:

[0282] when When empty, the chemical plant In the year Maintain the unreduced emission path:

[0283] It should be noted that the above candidate paths Used to identify chemical plants that are not yet continuously locked into existing modification paths, and chemical plants that re-engage in path selection after the interruption of existing locked paths, in the year The target transformation path. For chemical plants whose transformation path was already locked in the previous planning year, the first step should be to determine the original path in that year. Whether the conditions for continued operation are still met; if no path interruption occurs, the original path will be maintained; if a path interruption occurs, the corresponding path lock will be released, and the target transformation path will be re-determined according to the above-mentioned path feasibility, marginal emission reduction cost and unit technology cost.

[0284] The interruption determination rules for the locked CCUS-EOR path have been given above. Correspondingly, the continued operation status and interruption status of the locked green hydrogen alternative path are further determined below.

[0285] For chemical plants that have already identified green hydrogen alternative pathways, their year is defined as follows: The path continues to run, and the indicator variable is:

[0286] Among them, when chemical plant In the year If the availability of green hydrogen resources, the operating status of related equipment, the lifespan of the plant, and the preset economic conditions for continued operation are still met... ;otherwise, .

[0287] For chemical plants that have already secured green hydrogen alternative pathways, the pathway disruption indicator variable is:

[0288] when At that time, it was determined that the chemical plant In the year The green hydrogen substitution pathway is interrupted; otherwise, the original green hydrogen substitution pathway continues.

[0289] chemical plant In the year The target transformation path is determined in the following order:

[0290] That is, for chemical plants that have locked in the CCUS-EOR pathway and have not experienced pathway interruption, their original CCUS-EOR pathway will be maintained; for chemical plants that have locked in the green hydrogen alternative pathway and have not experienced pathway interruption, their original green hydrogen alternative pathway will be maintained; for chemical plants that have experienced pathway interruption or have not yet locked in a transformation pathway, the target transformation pathway will be re-determined based on the feasibility of the pathway in that year, the marginal emission reduction cost, and the unit technology cost.

[0291] The set of chemical plants where the green hydrogen substitution pathway has been disrupted is as follows:

[0292] The green hydrogen alternative pathway lock set has been updated to:

[0293] in, For the year A new set of chemical plants has been added to select and lock green hydrogen alternative routes. Chemical plants whose routes have been interrupted have been removed from the green hydrogen alternative route locking set and will participate in subsequent modification route selection if the feasibility conditions of other routes are met.

[0294] Furthermore, this application performs cross-year recursion on various state variables to ensure consistency in multi-period decisions. Let the set of planning years be:

[0295] in, It includes calendar years from 2030 to 2060, with a time step of one year; Indicates the year The previous calendar year. Annual EOR injection requirements, annual maximum available injection capacity, annual emissions, annual production, and annual costs are all calculated and updated annually.

[0296] At the beginning of each planning year, annual capacity injection points The remaining annual injection capacity is based on this point in the year. Initialize the maximum available annual injection capacity:

[0297] in, Injecting Capabilities for the Year In the year The maximum available annual injection capacity can be determined based on the corresponding target EOR reservoir in the year. The pressure, permeability, number of injection wells, historical cumulative injection volume, recovery volume, and operating status are determined, or obtained based on an annual injection capacity sequence formed from external reservoir evaluation data. After completing the annual initialization, the allocation is performed according to the order of priority for locked CCUS-EOR projects, followed by newly added candidate projects. The remaining annual injection capacity will be deducted.

[0298] The total lifecycle storage capacity is deducted in one go as a newly reserved amount when the chemical plant first locks the CCUS-EOR path; when the path is interrupted and the release of unused reserved capacity is permitted, it is restored according to the corresponding release amount. Storage capacity points. The initial state is:

[0299] in, The starting year of the planning period. For the storage capacity point The initial full lifecycle storage capacity.

[0300] Storage capacity points In the year The remaining full lifecycle storage capacity is calculated using the following formula:

[0301] in, For chemical plant In the year When initially locking the CCUS-EOR path, the archived capacity point is... Additional full lifecycle storage capacity reserve; For chemical plant In the year Unused archived capacity released due to path interruption.

[0302] The actual net geological sequestration volume of a chemical plant is recorded and accumulated within its reserved full life cycle sequestration capacity, and will not be deducted repeatedly from the aforementioned remaining full life cycle sequestration capacity. For chemical plants that have completed the sequestration capacity reservation in the previous planning year, the additional reservation volume in subsequent years is zero.

[0303] The CCUS-EOR path-locked set is updated across years as follows:

[0304] The green hydrogen alternative pathway lock set has been updated year-over-year as follows:

[0305] in, For the year The set of chemical plants whose CCUS-EOR modification path has been identified by the end of the project; For the year The set of chemical plants whose CCUS-EOR modification path has been identified by the end of the project; For the year Add a set of chemical plants to select and lock the CCUS-EOR retrofit path; For the year The set of chemical plants where the CCUS-EOR path is interrupted; when the annual injection capacity matching rate between a chemical plant and its bound target EOR reservoir falls below the minimum guarantee threshold, the chemical plant is no longer within its operational lifespan, or the bound target EOR reservoir no longer meets any of the CO2-EOR engineering suitability conditions, the corresponding chemical plant will be included. .

[0306] For the year By the end, a collection of chemical plants with green hydrogen alternative pathways had been identified; For the year By the end, a collection of chemical plants with green hydrogen alternative pathways had been identified; For the year Add a set of chemical plants that can select and lock green hydrogen alternative pathways; For the year A collection of chemical plants that have interrupted their green hydrogen alternative pathways due to the unavailability of green hydrogen resources, the operating status of related equipment, the lifespan of the plant, or the fact that the pre-set economic conditions for continued operation are no longer met.

[0307] Since the full lifecycle storage capacity was reserved when the chemical plant first locked the CCUS-EOR path, subsequent years will not be interrupted due to insufficient storage capacity, which will be considered as the locked CCUS-EOR path.

[0308] Plant-level output is calculated based on capacity and utilization rate:

[0309] in, The unit is 10,000 tons / year; For the factory Capacity utilization rate, in % For chemical plant In the year Lifespan status indicator variable; For the factory In the year Product output, expressed in tens of thousands of tons per year. At that time, the factory In the year The product output is set to zero.

[0310]

[0311] in, For the factory In the year The selected modification path is path , For the industry Select path The factory in the year Total output.

[0312] The total emission reduction of the system is:

[0313] in, For chemical plant In the year Baseline CO2 emissions without considering lifetime conditions; For chemical plant In the year Lifespan status indicator variable; The baseline CO2 emissions taking into account the lifespan of the chemical plant; For chemical plant In the year Remaining CO2 emissions after adopting the selected modification path.

[0314] chemical plant In the year The remaining CO2 emissions after adopting the selected modification path are calculated using the following formula:

[0315] because The data already includes chemical plant life status indicator variables. Therefore, there is no need to The lifetime state indicator variable is multiplied again in the calculation formula. When At that time, the chemical plant had already ceased operation. The baseline CO2 emissions after considering the lifespan status and the remaining CO2 emissions after adopting the selected retrofit path were both taken as zero. The emission reduction caused by the natural decommissioning of the chemical plant was not included in the emission reduction of the low-carbon retrofit.

[0316] The total annual technical cost of the system is:

[0317] in, For chemical plant In the year Use the selected path The unit product technology cost excluding carbon price, in yuan / ton of product; The unit is 10,000 tons / year, therefore The unit is 10,000 yuan / year.

[0318] For the CCUS-EOR pathway, the unit product technology cost is the aforementioned CCUS-EOR unit product technology cost excluding carbon price; for green hydrogen substitution, CCU, off-grid green products, biomass conversion and non-emission reduction pathways, the unit product technology cost is calculated under the same cost caliber.

[0319] The carbon price is only used to determine whether the marginal emission reduction cost of the emission reduction path meets the implementation conditions, and is not included in the total annual technical cost of the system, so as to avoid the carbon price being calculated repeatedly as both the path implementation threshold and the technical cost item.

[0320] The total cost of intertemporal discounting is:

[0321] in, The discount rate is... The starting year of the planning period. This represents the present value of the total system technical cost during the planning period, expressed in ten thousand yuan.

[0322] Therefore, after the low-carbon transformation optimization calculation is completed, the embodiments of this application output detailed data on the source-sink matching of chemical plants, data on the remaining annual injection capacity and remaining full life cycle storage capacity of EOR reservoirs, cost data of each transformation path, target transformation plan for a single plant and industry-classified summary statistical data, so that the optimization results can be archived and traced.

[0323] Specifically, the output includes a source-sink matching details table, an EOR injection status layer, an EOR cumulative storage status layer, a multi-path emission reduction cost table, a modification path selection comparison table, a final implementation status table driven by carbon prices, and a multi-dimensional industry output summary statistics table.

[0324] In summary, compared with related technologies, the embodiments of this application have technical advantages in terms of plant-level refined accounting, dynamic management and control of EOR dual resources, priority matching of existing projects, pre-screening of feasible paths, calculation of major cost items, and standardized output of results. By accurately quantifying individual plants, it reduces data deviation caused by regional average conversion; by relying on two differentiated resource update mechanisms—annual injection capacity and full life-cycle storage capacity—it avoids the duplication of stored resources; and by combining the priority matching rules of existing projects to reflect the engineering characteristics of continuous injection of CCUS-EOR projects, it only includes CCUS-EOR schemes that meet both source and sink constraints in the path economics comparison. Simultaneously, it constructs a cost accounting system covering major source-side transformation, CO2 transportation, injection, storage monitoring, sink-side transformation, and EOR oil increase revenue projects to evaluate the economics of transformation paths and output traceable source-sink matching, resource capacity, and transformation scheme structured data, providing support for regional chemical industry low-carbon transformation planning, scenario analysis, and engineering assessment.

[0325] The chemical plant-level CCUS-EOR low-carbon retrofit optimization method proposed in this application can determine the baseline emissions of each chemical plant based on the set of plant-level emission sources in the target area, calculate the captureable CO2 amount by combining the industry capture rate, and determine the annual EOR injection demand and the full life cycle storage demand accordingly. It then performs dual-constraint matching of annual injection capacity and full life cycle storage capacity to screen feasible CCUS-EOR paths. Based on a unified cost caliber, it determines the annual target retrofit path for each chemical plant, locks the selected CCUS-EOR paths, and updates the remaining annual EOR injection capacity, remaining full life cycle storage capacity, and path locking status of each plant annually. This achieves dynamic optimization of the full life cycle low-carbon retrofit, effectively improving the accuracy and rationality of chemical plant low-carbon retrofit planning. Therefore, it solves the problems in related technologies, such as the inability to achieve individualized emission reduction assessment and accurate screening for chemical plants, the inability to dynamically track and rationally allocate reservoir resources, and the resulting reduction in the accuracy and rationality of chemical plant low-carbon retrofit planning.

[0326] Next, referring to the accompanying drawings, the chemical plant-level CCUS-EOR low-carbon retrofit and optimization device proposed according to the embodiments of this application is described.

[0327] Figure 7 This is a block diagram of a chemical plant-level CCUS-EOR low-carbon retrofit and optimization device according to an embodiment of this application.

[0328] like Figure 7 As shown, the chemical plant-level CCUS-EOR low-carbon retrofit and optimization device 10 includes: a first determining module 100, a second determining module 200, and an optimization module 300.

[0329] Specifically, the first determining module 100 is used to determine the baseline emissions of each chemical plant based on the set of plant-level emission sources in the target area.

[0330] The second determining module 200 is used to calculate the amount of captureable CO2 for each chemical plant based on the baseline emissions and the target industry capture rate, and to determine the annual enhanced oil recovery (EOR) injection requirement and the life-cycle sequestration requirement based on the amount of captureable CO2.

[0331] The optimization module 300 is used to bind and match the annual EOR injection demand and life-cycle storage demand of a chemical plant with the annual injection capacity and cumulative storage capacity of the same target EOR reservoir. This results in a CCUS-EOR path that meets the matching conditions. Based on a unified cost caliber, the module determines the target transformation path for each chemical plant in each year, locks the path for the selected CCUS-EOR path, and updates the remaining EOR injection capacity, remaining storage capacity, and path locking status of each chemical plant in the target area annually to optimize the life-cycle low-carbon transformation path for each chemical plant.

[0332] Optionally, in one embodiment of this application, the first determining module 100 includes a processing unit and a first determining unit.

[0333] The processing unit is used to standardize the latitude and longitude data, production capacity data, raw material routes, commissioning year, utilization rate, province, and emission data of each chemical plant in the target area, and convert them into a unified set of plant-level emission sources.

[0334] The first determining unit is used to determine the baseline emissions for each chemical plant by combining the plant-level emission source set with the target industry and raw material routes.

[0335] Optionally, in one embodiment of this application, the optimization module 300 includes a calculation unit and a first acquisition unit.

[0336] The calculation unit is used to calculate the annual injection capacity matching rate and the life-cycle storage capacity matching rate between the chemical plant and the target EOR reservoir, based on the chemical plant's annual EOR injection demand and life-cycle storage demand, as well as the annual injection capacity and cumulative storage capacity of the same target EOR reservoir.

[0337] The first acquisition unit is used to obtain a CCUS-EOR path that meets the target matching conditions when the annual injection capability matching rate is greater than or equal to a first preset threshold and the full life cycle sealing capacity matching rate is greater than or equal to a second preset threshold.

[0338] Optionally, in one embodiment of this application, for the same target EOR reservoir The expression for the annual injection capability matching rate is:

[0339] in, Indicates a chemical plant; Indicates the target EOR reservoir; Indicates the year; This indicates that it belongs to the target EOR reservoir. The annual set of injection capability points; Indicates a chemical plant In the year Annual EOR injection requirements; Indicates a chemical plant In the year Allocate to annual injection capacity points The annual CO2 injection volume.

[0340] The expression for the full lifecycle storage capacity matching rate is:

[0341] in, This indicates that they belong to the same target EOR reservoir. The set of storage capacity points throughout the entire lifecycle; Indicates a chemical plant In the year Capacity points for the entire lifecycle Additional full lifecycle storage capacity reserve; Indicates a chemical plant From the year The entire lifecycle of storage needs; The annual injection capacity matching and the full life cycle storage capacity matching adopt the same target EOR reservoir. Among them, the annual set of injected capability points. and the set of storage capacity points throughout the entire life cycle All belong to the same target EOR reservoir. The annual injection capacity or life-cycle storage capacity of different target EOR reservoirs will not be combined to meet the matching needs of the same chemical plant. When the annual injection capacity matching rate reaches the first preset threshold and the full life cycle storage capacity matching rate reaches the second preset threshold, the chemical plant is identified. With the target EOR reservoir The target matching conditions are met.

[0342] Optionally, in one embodiment of this application, the optimization module includes: a second acquisition unit and a second determination unit.

[0343] The second acquisition unit is used to compare the CCUS-EOR pathway with green hydrogen substitution, CCU, off-grid green products, and biomass pathways based on a unified cost caliber, and obtain the cost competition results.

[0344] The second determining unit is used to determine the target transformation path for each chemical plant in each year based on the results of cost competition.

[0345] It should be noted that the explanation of the above-mentioned embodiment of the chemical plant-level CCUS-EOR low-carbon retrofit and optimization method also applies to the chemical plant-level CCUS-EOR low-carbon retrofit and optimization device in this embodiment, and will not be repeated here.

[0346] The chemical plant-level CCUS-EOR low-carbon retrofit optimization device proposed in this application can determine the baseline emissions of each chemical plant based on the set of plant-level emission sources in the target area, calculate the amount of CO2 that can be captured by combining the industry capture rate, and determine the annual EOR injection demand and the full life cycle storage demand accordingly. It then performs dual-constraint matching of annual injection capacity and full life cycle storage capacity, screens feasible CCUS-EOR paths, determines the annual target retrofit path for each chemical plant based on a unified cost standard, locks the selected CCUS-EOR paths for the chemical plants, and updates the remaining annual EOR injection capacity, remaining full life cycle storage capacity, and path locking status of each plant annually. This achieves dynamic optimization of low-carbon retrofit throughout the entire life cycle, effectively improving the accuracy and rationality of low-carbon retrofit planning for chemical plants. Therefore, it solves the problems in related technologies, such as the inability to achieve individualized emission reduction assessment and accurate screening for chemical plants, the inability to dynamically track and rationally allocate reservoir resources, and the resulting reduction in the accuracy and rationality of low-carbon retrofit planning for chemical plants.

[0347] Figure 8 A schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device may include: The memory 801, the processor 802, and the computer program stored on the memory 801 and capable of running on the processor 802.

[0348] When the processor 802 executes the program, it implements the chemical plant-level CCUS-EOR low-carbon transformation and optimization method provided in the above embodiments.

[0349] Furthermore, electronic devices also include: Communication interface 803 is used for communication between memory 801 and processor 802.

[0350] The memory 801 is used to store computer programs that can run on the processor 802.

[0351] The memory 801 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0352] If the memory 801, processor 802, and communication interface 803 are implemented independently, then the communication interface 803, memory 801, and processor 802 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized into address buses, data buses, control buses, etc. For ease of representation, Figure 8 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0353] Optionally, in a specific implementation, if the memory 801, processor 802, and communication interface 803 are integrated on a single chip, then the memory 801, processor 802, and communication interface 803 can communicate with each other through an internal interface.

[0354] The processor 802 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0355] This embodiment also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described chemical plant-level CCUS-EOR low-carbon retrofit optimization method.

[0356] This embodiment also provides a computer program product, including a computer program, which, when executed, is used to implement the above-mentioned chemical plant-level CCUS-EOR low-carbon transformation and optimization method.

[0357] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0358] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0359] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a function or process, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order according to the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0360] Steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing functionality, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0361] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0362] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0363] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A method for optimizing low-carbon retrofitting of a chemical plant using CCUS-EOR, characterized in that, Includes the following steps: Based on the set of plant-level emission sources of chemical plants in the target area, the baseline emission of each chemical plant is determined; The amount of captureable CO2 for each chemical plant is calculated based on baseline emissions and target industry capture rates, and the annual enhanced oil recovery (EOR) injection requirement and the life-cycle sequestration requirement are determined based on the amount of captureable CO2. The annual EOR injection and life-cycle storage requirements of chemical plants are matched with the annual injection capacity and cumulative storage capacity of the same target EOR reservoir to obtain a carbon capture, utilization, storage and enhanced oil recovery (CCUS-EOR) path that meets the matching conditions. Based on a unified cost caliber, the target transformation path for each chemical plant in each year is determined. The chemical plants selected for the CCUS-EOR path are locked, and the remaining EOR injection capacity, remaining storage capacity and path locking status of each chemical plant in the target area are updated annually to optimize the life-cycle low-carbon transformation path for each chemical plant.

2. The method according to claim 1, characterized in that, The set of plant-level emission sources based on the target area determines the baseline emissions for each chemical plant, including: The latitude and longitude data, production capacity data, raw material routes, commissioning year, utilization rate, province, and emission data of each chemical plant in the target area are standardized and uniformly converted into a set of plant-level emission sources. By combining the set of plant-level emission sources and the target industry and raw material routes, the baseline emission amount for each chemical plant is determined.

3. The method according to claim 1, characterized in that, The process of binding and matching the annual EOR injection demand and full lifecycle storage demand of a chemical plant with the annual injection capacity and cumulative storage capacity of the same target EOR reservoir to obtain a CCUS-EOR path that meets the matching conditions includes: Based on the chemical plant's annual EOR injection requirements and life-cycle storage requirements, as well as the annual injection capacity and cumulative storage capacity of the same target EOR reservoir, calculate the annual injection capacity matching rate and life-cycle storage capacity matching rate between the chemical plant and the target EOR reservoir, respectively. When the annual injection capacity matching rate is detected to be greater than or equal to a first preset threshold and the full life cycle storage capacity matching rate is greater than or equal to a second preset threshold, a CCUS-EOR path that satisfies the target matching condition between the chemical plant and the target EOR reservoir is obtained.

4. The method according to claim 3, characterized in that, For the same target EOR reservoir, the expression for the annual injection capacity matching rate is: in, Indicates a chemical plant. Indicates the year. Indicates the target EOR reservoir. This indicates that it belongs to the target EOR reservoir. The annual set of injected capability points, Indicates a chemical plant In the year Annual EOR injection requirements, Indicates a chemical plant In the year Allocate to annual injection capacity points Annual CO2 injection volume; The expression for the full lifecycle storage capacity matching rate is: in, This indicates that they belong to the same target EOR reservoir. The set of storage capacity points throughout the entire lifecycle, Indicates a chemical plant In the year Capacity points for the entire lifecycle The newly added full life cycle storage capacity reserve, Indicates a chemical plant From the year The need for full lifecycle sealing.

5. The method according to claim 1, characterized in that, The determination of the target transformation path for each chemical plant in each year based on a unified cost standard includes: Based on a unified cost caliber, the CCUS-EOR pathway is compared with green hydrogen substitution, CCU, off-grid green products, and biomass pathway in terms of cost to obtain cost competition results; The target transformation path for each chemical plant in each year is determined based on the cost competition results.

6. A chemical plant-level CCUS-EOR low-carbon retrofit and optimization device, characterized in that, include: The first determination module is used to determine the baseline emissions of each chemical plant based on the set of plant-level emission sources in the target area. The second determining module is used to calculate the amount of captureable CO2 for each chemical plant based on the baseline emissions and the target industry capture rate, and to determine the annual enhanced oil recovery (EOR) injection requirement and the life cycle sequestration requirement based on the amount of captureable CO2. The optimization module is used to bind and match the annual EOR injection demand and life-cycle storage demand of a chemical plant with the annual injection capacity and cumulative storage capacity of the same target EOR reservoir. This results in a CCUS-EOR path that meets the matching conditions. Based on a unified cost caliber, the module determines the target transformation path for each chemical plant in each year, locks the path for the selected CCUS-EOR path, and updates the remaining EOR injection capacity, remaining storage capacity, and path locking status of each chemical plant in the target area annually to optimize the life-cycle low-carbon transformation path for each chemical plant.

7. The apparatus according to claim 6, characterized in that, The first determining module includes: The processing unit is used to standardize the latitude and longitude data, production capacity data, raw material routes, commissioning year, utilization rate, province and emission data of each chemical plant in the target area, and convert them into a unified set of plant-level emission sources. The first determining unit is used to determine the baseline emissions of each chemical plant by combining the set of plant-level emission sources and the target industry and raw material routes.

8. An electronic device, characterized in that, include: The memory, the processor, and the computer program stored in the memory and capable of running on the processor, wherein the processor executes the program to implement the chemical plant-level CCUS-EOR low-carbon retrofit optimization method as described in any one of claims 1-5.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the chemical plant-level CCUS-EOR low-carbon retrofit optimization method as described in any one of claims 1-5.

10. A computer program product, comprising a computer program, characterized in that, The computer program is executed by a processor to implement the chemical plant-level CCUS-EOR low-carbon retrofit optimization method as described in any one of claims 1-5.

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