An integrated coupling method and system for intelligent production and operation of gas storage facilities
By establishing an integrated coupled model of the gas storage reservoir, wellbore, and surface pipeline network, and automatically updating the inflow and outflow curves of injection and production wells, the problem of not considering comprehensive production constraints during the gas storage injection and production process was solved, and high-precision simulation analysis and optimization were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- PETROCHINA CO LTD
- Filing Date
- 2024-11-26
- Publication Date
- 2026-05-26
AI Technical Summary
Existing technologies fail to effectively consider the comprehensive production constraints of the gas reservoir, wellbore, and surface pipeline network during the gas injection and production process, resulting in injection and production capacity not being automatically updated with production and significant deviations in simulation analysis results.
Numerical simulation models of the gas storage reservoir, wellbore, and surface pipeline network are established. By coupling the gas storage reservoir-wellbore-surface pipeline network models, the inflow and outflow curves of injection and production wells are automatically updated to characterize changes in well production capacity. Integrated coupled simulation is performed using high-precision simulation tools such as INTERSECT and PIPESIM.
It enables more accurate simulation of the gas storage injection and production process, eliminates the result deviation of keeping the injection and production capacity constant, optimizes the injection and production system, and improves the accuracy and efficiency of simulation analysis.
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Figure CN122082831A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of gas storage technology, and in particular to an integrated coupling method and system for intelligent production and operation of gas storage facilities. Background Technology
[0002] Gas storage injection and production is a complex and complete system, including formation seepage, wellbore lifting, and surface gathering and transportation. Gas storage facilities are characterized by high-speed reciprocating injection and production. Optimizing its injection and production system requires the use of specialized software to create separate models of the gas storage reservoir, injection and production wellbore, and injection and production surface pipeline network. These models must be coupled together and take into account changes in production capacity during the gas injection and production process to realistically reproduce the gas storage injection and production process.
[0003] Regarding the integrated coupled simulation of shale gas reservoirs, wellbore, and surface pipelines, Chinese invention patent CN107133373B discloses a coupled simulation method for shale gas reservoirs, wellbore, and surface pipelines. The method includes: obtaining numerical simulation parameters for the shale gas reservoir, wellbore, and surface pipeline; establishing a fully implicit coupled numerical simulation model of the shale gas reservoir, wellbore, and surface pipeline; and solving the fully implicit coupled model based on the numerical simulation parameters to obtain the numerical simulation results for the shale gas reservoir, wellbore, and surface pipeline. This coupled simulation method, considering the drastic changes in the state of the wellbore and surface pipeline during actual shale gas development, proposes a method based on the shale gas numerical model, wellbore, and pipeline model, simultaneously calculating and solving these three sub-models. However, this method is only used for shale gas well extraction simulation and does not involve the gas injection process. Furthermore, the production capacity of a shale gas well differs between the production process and the high-speed gas extraction process in a gas storage facility.
[0004] Regarding the coupled simulation of gas storage facilities, Chinese invention patent CN114880962B discloses an "Integrated Analysis Method for Single-Well Injection and Production Capacity of Tight Gas Reservoirs Based on Formation Seepage-Wellbore Flow Coupling." This method initializes the numerical model pressure and saturation field by loading fluid and rock parameters, and fits the geological reserves of natural gas in the reservoir. Then, it inverts reservoir parameters using historical production and pressure dynamic data. A wellbore flow model is established using Pipesim software, generating a vertical flow pressure drop (VFP) table. This VFP table is imported into the reservoir seepage model. Considering the high-velocity non-Darcy effect and the influence of edge water in structurally low locations, the method optimizes and determines the reasonable injection and production capacity of a single well in an underground gas storage facility for tight gas reservoirs based on the principle of "low injection and production loss rate and strong peak-shaving capacity." This method addresses the limitations of methods that use the intersection of the inflow and outflow dynamic curves of old wells during the gas reservoir depletion development stage as the coordination point production and as the basis for single-well production and injection allocation during the gas storage facility construction and operation stage. However, this method does not take into account the differential production constraints of the surface pipeline network on each individual well.
[0005] In summary, when conducting numerical simulations of gas reservoirs using only gas reservoir seepage models, or when analyzing gas reservoir injection and production schemes using underground seepage simulations combined with vertical pipe flow tables, the comprehensive production constraints of the gas reservoir, injection and production wells, and injection and production pipelines are not considered systematically. Furthermore, there is the problem that the injection and production capacity of gas reservoir wells does not automatically update with production. Summary of the Invention
[0006] To address the aforementioned issues, this invention proposes an integrated coupling method and system for intelligent production and operation of gas storage facilities. This system encompasses the underground reservoir, injection and production wellbores, and surface pipelines, considering both gas production and injection processes. By automatically updating the inflow and outflow curves of the injection and production wells, it characterizes the changes in well production capacity during high-intensity injection and production processes. Combining the production characteristics of gas storage facilities, this invention establishes a high-precision, detailed numerical simulation model of the gas reservoir to characterize the underground heterogeneity and complex seepage characteristics. It also establishes flow models for the wellbore and pipelines to characterize fluid flow characteristics and couples these models with the gas storage reservoir-wellbore-surface pipeline model. This comprehensive approach considers production constraints from the reservoir, wellbore, and surface pipelines, and is of significant importance for analyzing and optimizing the injection and production regimes of gas storage facilities.
[0007] The technical solution adopted in this invention is as follows:
[0008] An integrated coupling method for intelligent production and operation of gas storage facilities, comprising:
[0009] Construction of numerical simulation model for gas storage reservoir: Based on the gas storage reservoir production dynamic data and geological knowledge, a geological model of the gas storage reservoir is established, and reserve fitting analysis and model quality control analysis are performed; fluid and rock property parameters are loaded into each zone of the gas storage reservoir geological model, a numerical simulation model of the gas storage reservoir is established and initialized, and then the model is fitted by combining historical data of depletion exploitation and historical data of gas storage reservoir injection and production.
[0010] Gas storage wellbore model construction: Based on the basic data of the gas injection wells and gas production wells of the gas storage, a gas storage wellbore model is established, and the model is fitted by combining the dynamic data of the gas injection wells and gas production wells during the gas injection period or gas production period.
[0011] Model construction of ground pipeline network for gas storage: A model of the ground pipeline network of the gas storage is established based on the relevant basic data of the ground pipeline network of the gas storage, and the model is fitted by combining temperature, pressure and flow monitoring data;
[0012] Construction of an integrated coupled model for gas storage: The gas storage wellbore model and the gas storage surface pipeline network model are combined and coupled with the gas storage numerical simulation model to complete well mapping and fluid mapping, forming an integrated coupled model of gas storage reservoir-wellbore-pipeline network, thereby carrying out coupled simulation and gas storage simulation analysis.
[0013] Furthermore, in the construction of the gas storage reservoir numerical simulation model, a gas storage reservoir geological model is established based on gas storage reservoir production dynamic data and geological knowledge, and reserve fitting analysis and model quality control analysis are performed; fluid and rock property parameters are loaded onto each zone of the gas storage reservoir geological model to establish and initialize the gas storage reservoir numerical simulation model, including:
[0014] A geological model of the gas storage facility is established based on dynamic production data and geological knowledge. A reserve fitting analysis is completed, and a model quality control analysis is conducted in conjunction with geological understanding. The dynamic production data of the gas storage facility includes well data, stratigraphic data, stratigraphic interpretation data, fault interpretation data, well logging interpretation data, geological research data, and well test data.
[0015] Define or import loading fluid and rock property parameters for each zone of the gas storage geological model, set initialization conditions, establish a numerical simulation model of the gas storage reservoir, initialize the model, and verify the pore volume and model reserves of the gas storage reservoir numerical simulation model by zone and layer.
[0016] Furthermore, in the construction of the gas storage wellbore model, a gas storage wellbore model is established based on the relevant basic data of the gas injection wells and gas production wells in the gas storage, and the model is fitted by combining the dynamic data of the gas injection wells and gas production wells during the gas injection or gas production period, including:
[0017] Based on the basic data related to the gas injection wells and gas production wells of the gas storage facility, gas injection wellbore models and gas production wellbore models are established respectively using steady-state multiphase flow simulation modeling tools; the basic data related to the gas injection wells and gas production wells include well structure data, well trajectory data, fluid property analysis data, and ambient temperature data;
[0018] By combining the dynamic data of injection wells and production wells during the injection or production period, fitting is performed on the injection wellbore model and the production wellbore model respectively; the dynamic data of injection wells and production wells during the injection or production period includes static temperature or static pressure test data, flow temperature or flow pressure test data, well productivity test data, and fiber optic test data.
[0019] Furthermore, in the construction of the gas storage ground pipeline network model, a gas storage ground pipeline network model is established based on the relevant basic data of the gas storage ground pipeline network, and model fitting is performed in conjunction with temperature, pressure and flow monitoring data, including:
[0020] Based on the basic data related to the ground pipeline network of the gas storage facility, a gas injection ground pipeline network model and a gas extraction ground pipeline network model were established using a steady-state multiphase flow simulation modeling tool. The basic data related to the ground pipeline network includes ground pipeline material and routing data, fluid property analysis data, and ambient temperature data.
[0021] By combining temperature, pressure and flow monitoring data, we analyzed and screened horizontal pipe flow models, adjusted friction correction factors, compared simulation results and test data, and completed the fitting correction of the gas injection surface pipeline network model and the gas production surface pipeline network model.
[0022] Furthermore, in the construction of the integrated coupled model of the gas storage facility, the gas storage wellbore model and the gas storage surface pipeline network model are combined, and the gas storage numerical simulation model is coupled to complete well mapping and fluid mapping, forming an integrated coupled model of the gas storage reservoir-wellbore-pipeline network, thereby carrying out coupled simulation and gas storage simulation analysis, including:
[0023] In the gas production surface pipeline network model that has been fitted and corrected, the fitted gas production wellbore model is imported to obtain the gas storage gas production wellbore-pipeline network model; in the gas injection surface pipeline network model that has been fitted and corrected, the fitted gas injection wellbore model is imported to obtain the gas storage gas injection wellbore-pipeline network model.
[0024] The numerical simulation model of the gas storage reservoir is coupled with the gas production wellbore-pipeline model to complete well mapping, so that there is a one-to-one correspondence between the gas production wells in the numerical simulation model of the gas storage reservoir and the gas production wellbore-pipeline model; and the fluid mapping between the models is completed to make the fluid phase behavior of the numerical simulation model of the gas storage reservoir and the gas production wellbore-pipeline model consistent, forming an integrated coupled model of gas storage reservoir and gas production; coupled simulation is carried out, and integrated coupled simulation analysis based on gas storage reservoir-wellbore-pipeline network is performed;
[0025] The numerical simulation model of the gas storage reservoir is coupled with the gas injection wellbore-pipeline model to complete well mapping, so that there is a one-to-one correspondence between the gas injection wells in the numerical simulation model of the gas storage reservoir and the gas injection wellbore-pipeline model; and the fluid mapping between the models is completed to make the fluid phase behavior of the numerical simulation model of the gas storage reservoir and the gas injection wellbore-pipeline model consistent, forming an integrated coupled model of gas storage reservoir and gas injection; coupled simulation is carried out, and integrated coupled simulation analysis based on gas storage reservoir-wellbore-pipeline network is performed.
[0026] An integrated coupled system for intelligent production and operation of gas storage facilities, comprising:
[0027] The gas storage reservoir numerical simulation model construction module is configured to establish a gas storage reservoir geological model based on gas storage reservoir production dynamic data and geological knowledge, and to perform reserve fitting analysis and model quality control analysis; to load fluid and rock property parameters into each zone of the gas storage reservoir geological model, to establish and initialize the gas storage reservoir numerical simulation model, and then to combine the historical data of depletion exploitation and the historical data of gas storage reservoir injection and production to perform model fitting.
[0028] The gas storage wellbore model building module is configured to build a gas storage wellbore model based on the basic data of the gas injection wells and gas production wells in the gas storage, and to perform model fitting by combining the dynamic data of the gas injection wells and gas production wells during the gas injection or gas production period.
[0029] The gas storage ground pipeline network model building module is configured to build a gas storage ground pipeline network model based on the basic data related to the gas storage ground pipeline network, and to perform model fitting by combining temperature, pressure and flow monitoring data;
[0030] The integrated coupled model construction module for gas storage is configured to combine the gas storage wellbore model and the gas storage surface pipeline network model, and couple the gas storage numerical simulation model to complete well mapping and fluid mapping, forming an integrated coupled model of gas storage reservoir-wellbore-pipeline network, thereby carrying out coupled simulation and gas storage simulation analysis.
[0031] Furthermore, in the gas storage reservoir numerical simulation model construction module, a gas storage reservoir geological model is established based on gas storage reservoir production dynamic data and geological knowledge, and reserve fitting analysis and model quality control analysis are performed; fluid and rock property parameters are loaded onto each zone of the gas storage reservoir geological model to establish and initialize the gas storage reservoir numerical simulation model, including:
[0032] A geological model of the gas storage facility is established based on dynamic production data and geological knowledge. A reserve fitting analysis is completed, and a model quality control analysis is conducted in conjunction with geological understanding. The dynamic production data of the gas storage facility includes well data, stratigraphic data, stratigraphic interpretation data, fault interpretation data, well logging interpretation data, geological research data, and well test data.
[0033] Define or import loading fluid and rock property parameters for each zone of the gas storage geological model, set initialization conditions, establish a numerical simulation model of the gas storage reservoir, initialize the model, and verify the pore volume and model reserves of the gas storage reservoir numerical simulation model by zone and layer.
[0034] Furthermore, in the gas storage wellbore model construction module, a gas storage wellbore model is established based on the relevant basic data of the gas injection wells and gas production wells of the gas storage, and the model is fitted by combining the dynamic data of the gas injection wells and gas production wells during the gas injection or gas production period, including:
[0035] Based on the basic data related to the gas injection wells and gas production wells of the gas storage facility, gas injection wellbore models and gas production wellbore models are established respectively using steady-state multiphase flow simulation modeling tools; the basic data related to the gas injection wells and gas production wells include well structure data, well trajectory data, fluid property analysis data, and ambient temperature data;
[0036] By combining the dynamic data of injection wells and production wells during the injection or production period, fitting is performed on the injection wellbore model and the production wellbore model respectively; the dynamic data of injection wells and production wells during the injection or production period includes static temperature or static pressure test data, flow temperature or flow pressure test data, well productivity test data, and fiber optic test data.
[0037] Furthermore, in the gas storage ground pipeline network model construction module, a gas storage ground pipeline network model is established based on the relevant basic data of the gas storage ground pipeline network, and model fitting is performed in conjunction with temperature, pressure and flow monitoring data, including:
[0038] Based on the basic data related to the ground pipeline network of the gas storage facility, a gas injection ground pipeline network model and a gas extraction ground pipeline network model were established using a steady-state multiphase flow simulation modeling tool. The basic data related to the ground pipeline network includes ground pipeline material and routing data, fluid property analysis data, and ambient temperature data.
[0039] By combining temperature, pressure and flow monitoring data, we analyzed and screened horizontal pipe flow models, adjusted friction correction factors, compared simulation results and test data, and completed the fitting correction of the gas injection surface pipeline network model and the gas production surface pipeline network model.
[0040] Furthermore, in the integrated coupled model construction module for the gas storage facility, the gas storage wellbore model and the gas storage surface pipeline network model are combined, and the gas storage numerical simulation model is coupled to complete well mapping and fluid mapping, forming an integrated coupled model of the gas storage reservoir-wellbore-pipeline network, thereby carrying out coupled simulation and gas storage simulation analysis, including:
[0041] In the gas production surface pipeline network model that has been fitted and corrected, the fitted gas production wellbore model is imported to obtain the gas storage gas production wellbore-pipeline network model; in the gas injection surface pipeline network model that has been fitted and corrected, the fitted gas injection wellbore model is imported to obtain the gas storage gas injection wellbore-pipeline network model.
[0042] The numerical simulation model of the gas storage reservoir is coupled with the gas production wellbore-pipeline model to complete well mapping, so that there is a one-to-one correspondence between the gas production wells in the numerical simulation model of the gas storage reservoir and the gas production wellbore-pipeline model; and the fluid mapping between the models is completed to make the fluid phase behavior of the numerical simulation model of the gas storage reservoir and the gas production wellbore-pipeline model consistent, forming an integrated coupled model of gas storage reservoir and gas production; coupled simulation is carried out, and integrated coupled simulation analysis based on gas storage reservoir-wellbore-pipeline network is performed;
[0043] The numerical simulation model of the gas storage reservoir is coupled with the gas injection wellbore-pipeline model to complete well mapping, so that there is a one-to-one correspondence between the gas injection wells in the numerical simulation model of the gas storage reservoir and the gas injection wellbore-pipeline model; and the fluid mapping between the models is completed to make the fluid phase behavior of the numerical simulation model of the gas storage reservoir and the gas injection wellbore-pipeline model consistent, forming an integrated coupled model of gas storage reservoir and gas injection; coupled simulation is carried out, and integrated coupled simulation analysis based on gas storage reservoir-wellbore-pipeline network is performed.
[0044] The beneficial effects of this invention are as follows:
[0045] (1) The integrated coupling method and system of this invention covers the underground reservoir of the gas storage facility, the wellbore of the injection and production wells, and the surface pipeline network. It considers the gas production and injection processes of the gas storage facility and characterizes the changes in well production capacity during high-intensity injection and production of the gas storage facility by automatically updating the inflow and outflow curves of the injection and production wells. This invention combines the production characteristics of the gas storage facility, establishes a high-precision and detailed numerical simulation model of the gas reservoir to characterize the underground heterogeneity and complex seepage characteristics of the gas storage facility, establishes a flow model of the wellbore and pipeline network to characterize the fluid flow characteristics, and couples the gas storage facility-wellbore-surface pipeline network model. It considers the comprehensive production constraints from the gas reservoir, wellbore, and surface pipeline network, which is of great significance for analyzing and optimizing the injection and production system of the gas storage facility.
[0046] (2) Addressing the shortcomings of existing gas reservoir injection and production schemes, this invention recognizes the deficiencies in considering reservoir production dynamics, wellbore injection and production processes, and surface gathering and transportation. It also considers the changes in production capacity of injection and production wells at different production stages. Therefore, it proposes establishing a gas reservoir numerical simulation model, an injection-production wellbore model, and an injection-production pipeline network model. Then, it performs integrated coupled simulations of the gas reservoir production process (considering automatic updates to production capacity) and the injection process (considering automatic updates to injection well capacity), thus overcoming the shortcomings of integrated coupling that only considers production and not injection. Furthermore, the high-precision gas reservoir numerical simulation model continuously updates the injection and production capacity of wells during high-intensity injection and production processes, eliminating the result deviation caused by the constant injection and production capacity during the coupled process.
[0047] (3) By establishing a professional model, this invention covers the gas storage reservoir, gas storage wellbore and surface pipeline network, and completely simulates the entire underground and above-ground injection and production flow process, making the simulation analysis more realistic.
[0048] (4) In this invention, the gas reservoir part of the gas storage facility is characterized by a high-precision three-dimensional model, which can more accurately simulate the distribution of fluid in underground space and the propagation of pressure in the formation, making the integrated coupling optimization analysis based on gas reservoir-wellbore-pipeline network more reasonable.
[0049] (5) Based on the high-performance numerical simulator INTERSECT and the steady-state multiphase flow simulator PIPESIM, the integrated coupled simulation of gas storage reservoir-wellbore-pipeline network is fast and efficient, making the selection of multiple injection and production schemes of gas storage reservoir smoother and more convenient. Attached Figure Description
[0050] Figure 1 This is a flowchart of the integrated coupling method of Embodiment 1 of the present invention.
[0051] Figure 2 This is a schematic diagram of well mapping in Embodiment 1 of the present invention.
[0052] Figure 3 This is a schematic diagram of fluid mapping in Embodiment 1 of the present invention.
[0053] Figure 4 This is a schematic diagram of one iteration process of Embodiment 1 of the present invention.
[0054] Figure 5 This is a schematic diagram of the wellbore model of the gas storage injection and production well in Embodiment 1 of the present invention.
[0055] Figure 6 This is a schematic diagram of the gas storage wellbore-pipeline model of Embodiment 1 of the present invention.
[0056] Figure 7 This is a graph showing the inflow and outflow production capacity of two adjacent reporting steps of a gas storage well during a coupled simulation.
[0057] Figure 8 This is an integrated coupled simulation of the pressure curves of the injection and output stations and the external output point in Embodiment 1 of the present invention.
[0058] Figure 9 This is a pressure curve diagram of an integrated coupled simulation injection and production station according to Embodiment 1 of the present invention.
[0059] Figure 10 This is an integrated coupled simulation of the bottom pressure curve of a single well in Embodiment 1 of the present invention. Detailed Implementation
[0060] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments are now described. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention; that is, the described embodiments are only a part of the embodiments of the invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0061] Example 1
[0062] Because the analysis of gas reservoir injection and production schemes using only gas reservoir seepage models or underground seepage simulation combined with vertical pipe flow tables did not take into account the comprehensive production constraints of gas reservoirs, injection and production wells, and injection and production pipelines, and there is a problem that the injection and production capacity of gas reservoir wells does not automatically update with production.
[0063] Based on this, this embodiment provides an integrated coupling method for intelligent production and operation of gas storage facilities, such as... Figure 1 As shown, it includes:
[0064] Construction of numerical simulation model for gas storage reservoir: Based on the gas storage reservoir production dynamic data and geological knowledge, a geological model of the gas storage reservoir is established, and reserve fitting analysis and model quality control analysis are performed; fluid and rock property parameters are loaded into each zone of the gas storage reservoir geological model, a numerical simulation model of the gas storage reservoir is established and initialized, and then the model is fitted by combining historical data of depletion exploitation and historical data of gas storage reservoir injection and production.
[0065] Gas storage wellbore model construction: Based on the basic data of the gas injection wells and gas production wells of the gas storage, a gas storage wellbore model is established, and the model is fitted by combining the dynamic data of the gas injection wells and gas production wells during the gas injection period or gas production period.
[0066] Model construction of ground pipeline network for gas storage: A model of the ground pipeline network of the gas storage is established based on the relevant basic data of the ground pipeline network of the gas storage, and the model is fitted by combining temperature, pressure and flow monitoring data;
[0067] Construction of an integrated coupled model for gas storage: The gas storage wellbore model and the gas storage surface pipeline network model are combined and coupled with the gas storage numerical simulation model to complete well mapping and fluid mapping, forming an integrated coupled model of gas storage reservoir-wellbore-pipeline network, thereby carrying out coupled simulation and gas storage simulation analysis.
[0068] Preferably, the numerical simulation model of the gas storage reservoir can be constructed in the following ways:
[0069] A geological model of the gas storage facility is established based on dynamic production data and geological knowledge. This dynamic production data can include well data, stratigraphic data, stratigraphic interpretation data, fault interpretation data, well logging interpretation data, geological research data, and well test data. Reserve fitting analysis is then performed, and model quality control analysis is conducted in conjunction with geological understanding. More preferably, model quality control analysis can use methods such as cell volume, cell angle, and cell inside / out to check for negative volume grids and abnormal grid shapes, thus assisting in grid quality control.
[0070] Define or import loading fluid and rock property parameters for each zone of the gas storage geological model, set initialization conditions, establish a gas storage reservoir numerical simulation model using numerical simulation tools (such as the high-performance numerical simulator INTERSECT), initialize the model, and verify the pore volume and model reserves of the gas storage reservoir numerical simulation model by zone and layer.
[0071] Using historical data on depletion recovery and gas storage injection and production, simulations were performed on each historical production stage. By comparing historical data with simulation results, the fit of the numerical simulation of the gas storage reservoir was examined. After completing the historical data fitting, gas storage production and injection schemes were defined, production predictions were calculated, and the accuracy of the gas storage reservoir numerical simulation model in predicting gas storage production and injection was evaluated.
[0072] Preferably, the gas storage wellbore model can be constructed in the following ways:
[0073] Based on the basic data related to the injection and production wells of the gas storage facility, injection and production wellbore models are established respectively using steady-state multiphase flow simulation modeling tools (such as the steady-state multiphase flow simulator PIPESIM). The basic data related to the injection and production wells can include wellbore structure data, well trajectory data, fluid property analysis data, and ambient temperature data.
[0074] By combining dynamic data from injection and production wells during the injection or production phases, results analysis was conducted on both injection and production wellbore models. Vertical pipe flow models were selected through analysis, and friction correction factors, liquid holdup correction factors, and thermal conductivity multiplication factors were adjusted. Simulation results and test data were compared to perform model fitting correction. The dynamic data from injection and production wells during the injection or production phases can include static temperature or static pressure test data, flow temperature or flow pressure test data, well productivity test data, and fiber optic test data.
[0075] Preferably, the construction of the ground pipeline network model for the gas storage facility can be achieved in the following ways:
[0076] Based on the basic data related to the ground pipeline network of the gas storage facility, a gas injection ground pipeline network model and a gas production ground pipeline network model are established respectively using a steady-state multiphase flow simulation modeling tool. The basic data related to the ground pipeline network can include ground pipeline material and routing data, fluid property analysis data, and ambient temperature data.
[0077] By combining temperature, pressure and flow monitoring data, we analyzed and screened horizontal pipe flow models, adjusted friction correction factors, compared simulation results and test data, and completed the fitting correction of the gas injection surface pipeline network model and the gas production surface pipeline network model.
[0078] Preferably, the integrated coupling model of the gas storage facility can be constructed in the following ways:
[0079] In the gas production surface pipeline network model that has been fitted and corrected, the fitted gas production wellbore model is imported to obtain the gas storage wellbore-pipeline network model; in the gas injection surface pipeline network model that has been fitted and corrected, the fitted gas injection wellbore model is imported to obtain the gas storage injection wellbore-pipeline network model.
[0080] The numerical simulation model of the gas storage facility is coupled with the gas production wellbore-pipeline network model to complete well mapping, such as... Figure 2 As shown, this ensures a one-to-one correspondence between the gas storage numerical simulation model and the gas production wells in the gas production wellbore-pipeline model; and completes the fluid mapping between the models, such as... Figure 3 As shown, the fluid phase behavior of the gas storage numerical simulation model is made consistent with that of the gas production wellbore-pipeline model, forming an integrated coupled model of gas storage and gas production; coupled simulations are carried out, such as... Figure 4 As shown, an integrated coupled simulation analysis based on the gas storage reservoir-wellbore-pipeline network is performed.
[0081] The numerical simulation model of the gas storage facility is coupled with the gas injection wellbore-pipeline model to complete well mapping, such as... Figure 2 As shown, this ensures a one-to-one correspondence between the gas storage numerical simulation model and the gas injection wells in the injection wellbore-pipeline model; and completes the fluid mapping between the models, such as... Figure 3 As shown, the fluid phase behavior of the gas storage numerical simulation model is made consistent with that of the injection wellbore-pipeline model, forming an integrated coupled model of gas storage and injection; coupled simulations are carried out, such as... Figure 4 As shown, an integrated coupled simulation analysis based on the gas storage reservoir-wellbore-pipeline network is performed.
[0082] More specifically, the integrated coupling method for intelligent production and operation of gas storage facilities in this embodiment can be implemented using the following steps:
[0083] (1) Establish a numerical simulation model of the gas storage reservoir. Fit and correct the numerical simulation model of the gas reservoir by using historical production data such as gas volume and pressure to make it represent the actual production status.
[0084] (2) Figure 5 As shown, a wellbore model is established, and the wellbore model is calibrated based on measurement data such as temperature, pressure, and flow rate to make it represent the actual production state.
[0085] (3) Establish a pipeline network model and correct the wellbore model based on the metering data such as temperature, pressure and flow rate so that it can represent the actual production status;
[0086] (4) Figure 6 As shown, a model of the combined wellbore and pipeline network is established, and the model is further validated:
[0087] (5) Couple the numerical simulation model of the gas storage reservoir with the wellbore-pipeline network model, complete the well mapping and fluid mapping, establish an integrated coupled model of the gas storage reservoir-wellbore-pipeline network, and carry out integrated coupled simulation analysis.
[0088] By establishing an integrated coupled model of the gas storage reservoir, wellbore, and pipeline network, and conducting integrated coupled simulations, the production dynamics of the gas storage facility can be simulated more realistically. Figure 7As shown; and to understand the status of the gas storage facility's gathering and injection stations, injection and production stations, and individual wells during the production process, such as Figures 8-10 As shown.
[0089] Example 2
[0090] This embodiment provides an integrated coupled system for intelligent production and operation of gas storage facilities, including a gas storage reservoir numerical simulation model construction module, a gas storage wellbore model construction module, a gas storage surface pipeline network model construction module, and a gas storage integrated coupled model construction module, wherein:
[0091] The gas storage reservoir numerical simulation model construction module is configured to establish a gas storage reservoir geological model based on gas storage reservoir production dynamic data and geological knowledge, and to perform reserve fitting analysis and model quality control analysis; to load fluid and rock property parameters into each zone of the gas storage reservoir geological model, to establish and initialize the gas storage reservoir numerical simulation model, and then to combine the historical data of depletion exploitation and the historical data of gas storage reservoir injection and production to perform model fitting.
[0092] The gas storage wellbore model building module is configured to establish a gas storage wellbore model based on the basic data related to the gas injection wells and gas production wells of the gas storage, and to perform model fitting by combining the dynamic data of the gas injection wells and gas production wells during the gas injection or gas production period.
[0093] The gas storage ground pipeline network model building module is configured to establish a gas storage ground pipeline network model based on the basic data related to the gas storage ground pipeline network, and to perform model fitting by combining temperature, pressure and flow monitoring data.
[0094] The integrated coupled model construction module for gas storage is configured to combine the gas storage wellbore model and the gas storage surface pipeline network model, and couple the gas storage numerical simulation model to complete well mapping and fluid mapping, forming an integrated coupled model of gas storage reservoir-wellbore-pipeline network, thereby carrying out coupled simulation and gas storage simulation analysis.
[0095] Preferably, in the gas storage reservoir numerical simulation model construction module, a gas storage reservoir geological model is established based on gas storage reservoir production dynamic data and geological knowledge, and reserve fitting analysis and model quality control analysis are performed; fluid and rock property parameters are loaded onto each zone of the gas storage reservoir geological model to establish and initialize the gas storage reservoir numerical simulation model, including:
[0096] A geological model of the gas storage facility is established based on dynamic production data and geological knowledge. A reserve fitting analysis is completed, and a model quality control analysis is conducted in conjunction with geological understanding. The dynamic production data of the gas storage facility includes well data, stratigraphic data, stratigraphic interpretation data, fault interpretation data, well logging interpretation data, geological research data, and well test data.
[0097] Define or import loading fluid and rock property parameters for each zone of the gas storage geological model, set initialization conditions, establish a numerical simulation model of the gas storage reservoir, initialize the model, and verify the pore volume and model reserves of the gas storage reservoir numerical simulation model by zone and layer.
[0098] Preferably, in the gas storage wellbore model construction module, a gas storage wellbore model is established based on the relevant basic data of the gas injection wells and gas production wells of the gas storage, and the model is fitted by combining the dynamic data of the gas injection wells and gas production wells during the gas injection or gas production period, including:
[0099] Based on the basic data of the gas injection wells and gas production wells of the gas storage facility, gas injection wellbore models and gas production wellbore models were established respectively using steady-state multiphase flow simulation modeling tools; the basic data of the gas injection wells and gas production wells include well structure data, well trajectory data, fluid property analysis data, and ambient temperature data;
[0100] By combining the dynamic data of injection wells and production wells during the injection or production period, fitting was performed on the injection wellbore model and the production wellbore model respectively; the dynamic data of injection wells and production wells during the injection or production period included static temperature or static pressure test data, flow temperature or flow pressure test data, well productivity test data, and fiber optic test data.
[0101] Preferably, in the gas storage ground pipeline network model construction module, a gas storage ground pipeline network model is established based on the relevant basic data of the gas storage ground pipeline network, and model fitting is performed in conjunction with temperature, pressure and flow monitoring data, including:
[0102] Based on the basic data of the ground pipeline network of the gas storage facility, a gas injection ground pipeline network model and a gas production ground pipeline network model were established using a steady-state multiphase flow simulation modeling tool. The basic data of the ground pipeline network includes ground pipeline material and routing data, fluid property analysis data, and ambient temperature data.
[0103] By combining temperature, pressure and flow monitoring data, we analyzed and screened horizontal pipe flow models, adjusted friction correction factors, compared simulation results and test data, and completed the fitting correction of the gas injection surface pipeline network model and the gas production surface pipeline network model.
[0104] Preferably, in the integrated coupled model construction module for the gas storage facility, the gas storage wellbore model and the gas storage surface pipeline network model are combined, and the gas storage numerical simulation model is coupled to complete well mapping and fluid mapping, forming an integrated coupled model of the gas storage reservoir-wellbore-pipeline network, thereby carrying out coupled simulation and gas storage simulation analysis, including:
[0105] In the gas production surface pipeline network model that has been fitted and corrected, the fitted gas production wellbore model is imported to obtain the gas storage gas production wellbore-pipeline network model; in the gas injection surface pipeline network model that has been fitted and corrected, the fitted gas injection wellbore model is imported to obtain the gas storage gas injection wellbore-pipeline network model.
[0106] The numerical simulation model of the gas storage reservoir is coupled with the gas production wellbore-pipeline model to complete well mapping, so that there is a one-to-one correspondence between the gas production wells in the numerical simulation model of the gas storage reservoir and the gas production wellbore-pipeline model; and the fluid mapping between the models is completed to make the fluid phase behavior of the numerical simulation model of the gas storage reservoir and the gas production wellbore-pipeline model consistent, forming an integrated coupled model of gas storage reservoir and gas production; coupled simulation is carried out, and integrated coupled simulation analysis based on gas storage reservoir-wellbore-pipeline network is performed;
[0107] The numerical simulation model of the gas storage reservoir is coupled with the gas injection wellbore-pipeline model to complete well mapping, so that there is a one-to-one correspondence between the gas injection wells in the numerical simulation model of the gas storage reservoir and the gas injection wellbore-pipeline model; and the fluid mapping between the models is completed to make the fluid phase behavior of the numerical simulation model of the gas storage reservoir and the gas injection wellbore-pipeline model consistent, forming an integrated coupled model of gas storage reservoir and gas injection; coupled simulation is carried out, and integrated coupled simulation analysis based on gas storage reservoir-wellbore-pipeline network is performed.
[0108] Example 3
[0109] This embodiment is based on embodiment 1:
[0110] This embodiment provides a computer device, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the integrated coupling method for intelligent production and operation of a gas storage facility as described in Embodiment 1. The computer program can be in the form of source code, object code, executable file, or some intermediate form.
[0111] Example 4
[0112] This embodiment is based on embodiment 1:
[0113] This embodiment provides a computer-readable storage medium storing a computer program. When executed by a processor, this computer program implements an integrated coupling method for intelligent production and operation of a gas storage facility, as described in Embodiment 1. The computer program can be in the form of source code, object code, executable file, or some intermediate form. The storage medium includes any entity or device capable of carrying computer program code, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc. It should be noted that the content of the storage medium can be appropriately added or removed according to the requirements of legislation and patent practice in a jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the storage medium does not include electrical carrier signals and telecommunication signals.
[0114] It should be noted that, for the sake of simplicity, the foregoing method embodiments are described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.
Claims
1. An integrated coupling method for intelligent production and operation of gas storage facilities, characterized in that, include: Construction of numerical simulation model for gas storage reservoir: Based on the gas storage reservoir production dynamic data and geological knowledge, a geological model of the gas storage reservoir is established, and reserve fitting analysis and model quality control analysis are performed; fluid and rock property parameters are loaded into each zone of the gas storage reservoir geological model, a numerical simulation model of the gas storage reservoir is established and initialized, and then the model is fitted by combining historical data of depletion exploitation and historical data of gas storage reservoir injection and production. Gas storage wellbore model construction: Based on the basic data of the gas injection wells and gas production wells of the gas storage, a gas storage wellbore model is established, and the model is fitted by combining the dynamic data of the gas injection wells and gas production wells during the gas injection period or gas production period. Model construction of ground pipeline network for gas storage: A model of the ground pipeline network of the gas storage is established based on the relevant basic data of the ground pipeline network of the gas storage, and the model is fitted by combining temperature, pressure and flow monitoring data; Construction of an integrated coupled model for gas storage: The gas storage wellbore model and the gas storage surface pipeline network model are combined and coupled with the gas storage numerical simulation model to complete well mapping and fluid mapping, forming an integrated coupled model of gas storage reservoir-wellbore-pipeline network, thereby carrying out coupled simulation and gas storage simulation analysis.
2. The integrated coupling method for intelligent production and operation of gas storage facilities according to claim 1, characterized in that, In the construction of the numerical simulation model of the gas storage reservoir, a geological model of the gas storage reservoir is established based on the production dynamic data of the gas storage reservoir and geological knowledge, and reserve fitting analysis and model quality control analysis are carried out. Fluid and rock property parameters were loaded into each zone of the gas storage geological model to establish and initialize the gas reservoir numerical simulation model, including: A geological model of the gas storage facility is established based on dynamic production data and geological knowledge. A reserve fitting analysis is completed, and a model quality control analysis is conducted in conjunction with geological understanding. The dynamic production data of the gas storage facility includes well data, stratigraphic data, stratigraphic interpretation data, fault interpretation data, well logging interpretation data, geological research data, and well test data. Define or import loading fluid and rock property parameters for each zone of the gas storage geological model, set initialization conditions, establish a numerical simulation model of the gas storage reservoir, initialize the model, and verify the pore volume and model reserves of the gas storage reservoir numerical simulation model by zone and layer.
3. The integrated coupling method for intelligent production and operation of gas storage facilities according to claim 1, characterized in that, In the construction of the gas storage wellbore model, a gas storage wellbore model is established based on the relevant basic data of the gas injection wells and gas production wells in the gas storage, and the model is fitted by combining the dynamic data of the gas injection wells and gas production wells during the gas injection or gas production period, including: Based on the basic data related to the gas injection wells and gas production wells of the gas storage facility, gas injection wellbore models and gas production wellbore models are established respectively using steady-state multiphase flow simulation modeling tools; the basic data related to the gas injection wells and gas production wells include well structure data, well trajectory data, fluid property analysis data, and ambient temperature data; By combining the dynamic data of injection wells and production wells during the injection or production period, fitting is performed on the injection wellbore model and the production wellbore model respectively; the dynamic data of injection wells and production wells during the injection or production period includes static temperature or static pressure test data, flow temperature or flow pressure test data, well productivity test data, and fiber optic test data.
4. The integrated coupling method for intelligent production and operation of gas storage facilities according to claim 3, characterized in that, In the construction of the gas storage ground pipeline network model, a model of the gas storage ground pipeline network is established based on the relevant basic data of the gas storage ground pipeline network, and the model is fitted by combining temperature, pressure and flow monitoring data, including: Based on the basic data related to the ground pipeline network of the gas storage facility, a gas injection ground pipeline network model and a gas extraction ground pipeline network model were established using a steady-state multiphase flow simulation modeling tool. The basic data related to the ground pipeline network includes ground pipeline material and routing data, fluid property analysis data, and ambient temperature data. By combining temperature, pressure and flow monitoring data, we analyzed and screened horizontal pipe flow models, adjusted friction correction factors, compared simulation results and test data, and completed the fitting correction of the gas injection surface pipeline network model and the gas production surface pipeline network model.
5. The integrated coupling method for intelligent production and operation of gas storage facilities according to claim 4, characterized in that, In the construction of the integrated coupled model of the gas storage facility, the gas storage wellbore model and the gas storage surface pipeline network model are combined, and the gas storage numerical simulation model is coupled to complete well mapping and fluid mapping, forming an integrated coupled model of gas storage reservoir-wellbore-pipeline network, thereby carrying out coupled simulation and gas storage simulation analysis, including: In the gas production surface pipeline network model that has been fitted and corrected, the fitted gas production wellbore model is imported to obtain the gas storage gas production wellbore-pipeline network model; in the gas injection surface pipeline network model that has been fitted and corrected, the fitted gas injection wellbore model is imported to obtain the gas storage gas injection wellbore-pipeline network model. The numerical simulation model of the gas storage reservoir is coupled with the gas production wellbore-pipeline model to complete well mapping, so that there is a one-to-one correspondence between the gas production wells in the numerical simulation model of the gas storage reservoir and the gas production wellbore-pipeline model; and the fluid mapping between the models is completed to make the fluid phase behavior of the numerical simulation model of the gas storage reservoir and the gas production wellbore-pipeline model consistent, forming an integrated coupled model of gas storage reservoir and gas production; coupled simulation is carried out, and integrated coupled simulation analysis based on gas storage reservoir-wellbore-pipeline network is performed; The numerical simulation model of the gas storage reservoir is coupled with the gas injection wellbore-pipeline model to complete well mapping, so that there is a one-to-one correspondence between the gas injection wells in the numerical simulation model of the gas storage reservoir and the gas injection wellbore-pipeline model; and the fluid mapping between the models is completed to make the fluid phase behavior of the numerical simulation model of the gas storage reservoir and the gas injection wellbore-pipeline model consistent, forming an integrated coupled model of gas storage reservoir and gas injection; coupled simulation is carried out, and integrated coupled simulation analysis based on gas storage reservoir-wellbore-pipeline network is performed.
6. An integrated coupling system for intelligent production and operation of gas storage facilities, characterized in that, include: The gas storage reservoir numerical simulation model construction module is configured to establish a gas storage reservoir geological model based on gas storage reservoir production dynamic data and geological knowledge, and to perform reserve fitting analysis and model quality control analysis; to load fluid and rock property parameters into each zone of the gas storage reservoir geological model, to establish and initialize the gas storage reservoir numerical simulation model, and then to combine the historical data of depletion exploitation and the historical data of gas storage reservoir injection and production to perform model fitting. The gas storage wellbore model building module is configured to build a gas storage wellbore model based on the basic data of the gas injection wells and gas production wells in the gas storage, and to perform model fitting by combining the dynamic data of the gas injection wells and gas production wells during the gas injection or gas production period. The gas storage ground pipeline network model building module is configured to build a gas storage ground pipeline network model based on the basic data related to the gas storage ground pipeline network, and to perform model fitting by combining temperature, pressure and flow monitoring data; The integrated coupled model construction module for gas storage is configured to combine the gas storage wellbore model and the gas storage surface pipeline network model, and couple the gas storage numerical simulation model to complete well mapping and fluid mapping, forming an integrated coupled model of gas storage reservoir-wellbore-pipeline network, thereby carrying out coupled simulation and gas storage simulation analysis.
7. The integrated coupling system for intelligent production and operation of a gas storage facility according to claim 6, characterized in that, In the numerical simulation model construction module of the gas storage reservoir, a geological model of the gas storage reservoir is established based on the gas storage reservoir production dynamic data and geological knowledge, and the reserve fitting analysis and model quality control analysis are carried out. Fluid and rock property parameters were loaded into each zone of the gas storage geological model to establish and initialize the gas reservoir numerical simulation model, including: A geological model of the gas storage facility is established based on dynamic production data and geological knowledge. A reserve fitting analysis is completed, and a model quality control analysis is conducted in conjunction with geological understanding. The dynamic production data of the gas storage facility includes well data, stratigraphic data, stratigraphic interpretation data, fault interpretation data, well logging interpretation data, geological research data, and well test data. Define or import loading fluid and rock property parameters for each zone of the gas storage geological model, set initialization conditions, establish a numerical simulation model of the gas storage reservoir, initialize the model, and verify the pore volume and model reserves of the gas storage reservoir numerical simulation model by zone and layer.
8. The integrated coupling system for intelligent production and operation of a gas storage facility according to claim 6, characterized in that, The gas storage wellbore model construction module establishes a gas storage wellbore model based on the relevant basic data of the gas injection wells and gas production wells in the gas storage, and performs model fitting by combining the dynamic data of the gas injection wells and gas production wells during the gas injection or gas production period, including: Based on the basic data related to the gas injection wells and gas production wells of the gas storage facility, gas injection wellbore models and gas production wellbore models are established respectively using steady-state multiphase flow simulation modeling tools; the basic data related to the gas injection wells and gas production wells include well structure data, well trajectory data, fluid property analysis data, and ambient temperature data; By combining the dynamic data of injection wells and production wells during the injection or production period, fitting is performed on the injection wellbore model and the production wellbore model respectively; the dynamic data of injection wells and production wells during the injection or production period includes static temperature or static pressure test data, flow temperature or flow pressure test data, well productivity test data, and fiber optic test data.
9. An integrated coupling system for intelligent production and operation of a gas storage facility according to claim 8, characterized in that, The gas storage facility ground pipeline network model construction module establishes a gas storage facility ground pipeline network model based on relevant basic data, and performs model fitting by combining temperature, pressure, and flow monitoring data, including: Based on the basic data related to the ground pipeline network of the gas storage facility, a gas injection ground pipeline network model and a gas extraction ground pipeline network model were established using a steady-state multiphase flow simulation modeling tool. The basic data related to the ground pipeline network includes ground pipeline material and routing data, fluid property analysis data, and ambient temperature data. By combining temperature, pressure and flow monitoring data, we analyzed and screened horizontal pipe flow models, adjusted friction correction factors, compared simulation results and test data, and completed the fitting correction of the gas injection surface pipeline network model and the gas production surface pipeline network model.
10. An integrated coupling system for intelligent production and operation of a gas storage facility according to claim 9, characterized in that, In the integrated coupled model construction module for the gas storage facility, the gas storage wellbore model and the gas storage surface pipeline network model are combined, and the gas storage numerical simulation model is coupled to complete well mapping and fluid mapping, forming an integrated coupled model of the gas storage reservoir-wellbore-pipeline network. This allows for coupled simulation and gas storage facility simulation analysis, including: In the gas production surface pipeline network model that has been fitted and corrected, the fitted gas production wellbore model is imported to obtain the gas storage gas production wellbore-pipeline network model; in the gas injection surface pipeline network model that has been fitted and corrected, the fitted gas injection wellbore model is imported to obtain the gas storage gas injection wellbore-pipeline network model. The numerical simulation model of the gas storage reservoir is coupled with the gas production wellbore-pipeline model to complete well mapping, so that there is a one-to-one correspondence between the gas production wells in the numerical simulation model of the gas storage reservoir and the gas production wellbore-pipeline model; and the fluid mapping between the models is completed to make the fluid phase behavior of the numerical simulation model of the gas storage reservoir and the gas production wellbore-pipeline model consistent, forming an integrated coupled model of gas storage reservoir and gas production; coupled simulation is carried out, and integrated coupled simulation analysis based on gas storage reservoir-wellbore-pipeline network is performed; The numerical simulation model of the gas storage reservoir is coupled with the gas injection wellbore-pipeline model to complete well mapping, so that there is a one-to-one correspondence between the gas injection wells in the numerical simulation model of the gas storage reservoir and the gas injection wellbore-pipeline model; and the fluid mapping between the models is completed to make the fluid phase behavior of the numerical simulation model of the gas storage reservoir and the gas injection wellbore-pipeline model consistent, forming an integrated coupled model of gas storage reservoir and gas injection; coupled simulation is carried out, and integrated coupled simulation analysis based on gas storage reservoir-wellbore-pipeline network is performed.