Method and device for determining shale oil enrichment high-yield benefit dessert

Abstract

The invention provides a shale oil enrichment high-yield benefit dessert determination method and device. The shale oil enrichment high-yield benefit dessert determination method comprises the following steps: establishing a shale oil enrichment element evaluation model according to shale drilling data and experimental data of a target work area; establishing a shale oil economic benefit evaluation model according to the drilling and production cost of the shale oil well and the later production cost; and determining the shale oil enrichment high-yield benefit sweet spot of the target work area according to the shale oil enrichment element evaluation model, the engineering parameters required for modifying the shale oil well and the shale oil economic benefit evaluation model. Compared with an existing single-factor or double-factor geological-engineering dessert evaluation method, the shale oil dessert evaluation method has the advantages that key parameters are complete, shale oil desserts are rapidly and accurately evaluated, the shale oil dessert evaluation method is suitable for different shale oil types, storage increase and production increase of shale oil can be achieved, and the application prospect is wide.

Description

Technical Field

[0001] The present application belongs to the field of oil and natural gas exploration technology, and specifically relates to a method and device for determining a shale oil enrichment high-yield and efficient sweet spot. Background Art

[0002] In existing technologies, shale oil is still in the exploration and development phase. The key parameters for evaluating shale oil sweet spots in different regions and formations vary greatly, which is related to the current understanding and stage of shale oil sweet spot evaluation. Currently, shale oil sweet spot evaluation mainly focuses on geological sweet spots, supplemented by engineering parameter evaluation, and rarely considers economic sweet spots. Geological sweet spot evaluation generally considers total organic carbon, porosity, vitrinite reflectance, free oil content, etc., while engineering sweet spot evaluation parameters include brittleness index, fracture toughness, permeability, etc. Compared with conventional oil, shale oil has complex geological lithology and lithofacies, high extraction process technology requirements, and a relatively high break-even oil price for efficient development. Therefore, it is urgent to strengthen the research on integrated geological, engineering, and economic sweet spot evaluation methods based on the characteristics of continental shale oil, strengthen the comprehensive sweet spot evaluation of continental shale oil, form a shale oil enrichment and high-yield efficient sweet spot evaluation method, and improve the theoretical level of shale oil exploration and development and the scale of commercial development. Summary of the Invention

[0003] One object of the present invention is to provide a method for determining shale oil enrichment, high-yield, and profit-generating sweet spots. The present invention also provides a geology-engineering-economics integrated evaluation method for continental shale oil sweet spots.

[0004] Another object of the present invention is to provide a device for determining a shale oil enrichment, high-yield, and profit sweet spot. A further object of the present invention is to provide an electronic device comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the method for determining a shale oil enrichment, high-yield, and profit sweet spot are implemented. A further object of the present invention is to provide a readable medium storing a computer program, and when the processor executes the computer program, the steps of the method for determining a shale oil enrichment, high-yield, and profit sweet spot are implemented.

[0005] In order to solve the technical problems in the background technology of this application, the present invention provides the following technical solutions:

[0006] In a first aspect, the present invention provides a method for determining a shale oil enrichment high-yield benefit sweet spot, comprising:

[0007] Establish a shale oil enrichment factor evaluation model based on the drilling data and experimental data of the shale in the target work area;

[0008] Establishing a shale oil economic benefit evaluation model based on the drilling and production costs and subsequent production costs of the shale oil well;

[0009] The shale oil enrichment and high-yield benefit sweet spots in the target work area are determined based on the shale oil enrichment factor evaluation model, the engineering parameters required for transforming shale oil wells, and the shale oil economic benefit evaluation model.

[0010] In some embodiments of the present invention, establishing a shale oil enrichment factor evaluation model based on the drilling data and experimental data of the shale in the target work area includes:

[0011] Determine the shale thickness, shale lithofacies combination type, total organic carbon content, porosity, organic matter abundance, and pyrolysis parameters of the target work area based on the drilling data and the experimental data;

[0012] The shale oil enrichment factor evaluation model is established based on the shale thickness, shale lithofacies combination type, total organic carbon content, porosity, organic matter abundance and pyrolysis parameters.

[0013] In some embodiments of the present invention, determining the shale oil enrichment and high-yield benefit sweet spot in the target work area based on the shale oil enrichment factor evaluation model, the engineering parameters required for transforming the shale oil well, and the shale oil economic benefit evaluation model includes:

[0014] Establishing a shale oil high-yield condition evaluation model based on the shale oil enrichment factor evaluation model and the engineering parameters;

[0015] The shale oil enrichment and high-yield benefit sweet spot is determined based on the shale oil enrichment factor evaluation model, the shale oil high-yield condition evaluation model and the shale oil economic benefit evaluation model.

[0016] In some embodiments of the present invention, the shale oil enrichment factor evaluation model is used to calculate the shale oil resource and reserve scale of the target work area to identify favorable areas for enrichment factors.

[0017] In some embodiments of the present invention, the shale oil high-yield condition evaluation model is used to evaluate the test production of the shale oil well to identify favorable areas for high-yield conditions.

[0018] In some embodiments of the present invention, the shale oil economic benefit evaluation model is used to determine the economic benefit favorable area of ​​the target work area.

[0019] In some embodiments of the present invention, before establishing the shale oil enrichment factor evaluation model based on the drilling data and experimental data of the shale in the target work area, the method further includes:

[0020] Test whether the shale oil well production meets industrial oil flow standards.

[0021] In a second aspect, the present invention provides a device for determining a shale oil enrichment high-yield benefit sweet spot, the device comprising:

[0022] The enrichment factor evaluation model establishment module is used to establish a shale oil enrichment factor evaluation model based on the drilling data and experimental data of the shale in the target work area;

[0023] A benefit evaluation model establishment module is used to establish a shale oil economic benefit evaluation model based on the drilling and production costs and subsequent production costs of the shale oil well;

[0024] A high-yield and high-efficiency sweet spot determination module is used to determine the shale oil enrichment and high-yield and high-efficiency sweet spot in the target work area based on the shale oil enrichment factor evaluation model, the engineering parameters required for transforming shale oil wells, and the shale oil economic benefit evaluation model.

[0025] In some embodiments of the present invention, the enrichment factor evaluation model establishment module includes:

[0026] a key parameter screening unit, configured to determine the shale thickness, shale lithofacies combination type, total organic carbon content, porosity, organic matter abundance, and pyrolysis parameters of the target work area based on the drilling data and the experimental data;

[0027] The enrichment factor evaluation model establishment unit is used to establish the shale oil enrichment factor evaluation model according to the shale thickness, shale lithofacies combination type, total organic carbon content, porosity, organic matter abundance and pyrolysis parameters.

[0028] In some embodiments of the present invention, the high-yield benefit sweet spot determination module includes:

[0029] A high-yield condition evaluation model establishment unit, configured to establish a shale oil high-yield condition evaluation model based on the shale oil enrichment factor evaluation model and the engineering parameters;

[0030] A high-yield condition evaluation model determination unit is used to determine the shale oil enrichment high-yield benefit sweet spot based on the shale oil enrichment factor evaluation model, the shale oil high-yield condition evaluation model and the shale oil economic benefit evaluation model.

[0031] In some embodiments of the present invention, the shale oil enrichment factor evaluation model is used to calculate the shale oil resource and reserve scale of the target work area to identify favorable areas for enrichment factors.

[0032] In some embodiments of the present invention, the shale oil high-yield condition evaluation model is used to evaluate the test production of the shale oil well to identify favorable areas for high-yield conditions.

[0033] In some embodiments of the present invention, the shale oil economic benefit evaluation model is used to determine the economic benefit favorable area of ​​the target work area.

[0034] In some embodiments of the present invention, a device for determining a shale oil enrichment high-yield benefit sweet spot further includes:

[0035] The product testing module is used to test whether the production of the shale oil well meets the industrial oil flow standard.

[0036] In a third aspect, the present invention provides a computer program product comprising a computer program / instruction, which, when executed by a processor, implements the steps of a method for determining a shale oil enrichment high-yield benefit sweet spot.

[0037] In a fourth aspect, the present invention provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the steps of a method for determining a shale oil enrichment high-yield benefit sweet spot are implemented.

[0038] In a fifth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of a method for determining a shale oil enrichment high-yield benefit sweet spot.

[0039] From the above description, it can be seen that an embodiment of the present invention provides a method and device for determining a shale oil enrichment and high-yield benefit sweet spot. The corresponding shale oil enrichment and high-yield benefit sweet spot determination method includes: first, establishing a shale oil enrichment factor evaluation model based on the drilling data and experimental data of the shale in the target work area; then, establishing a shale oil economic benefit evaluation model based on the drilling and production costs of the shale oil wells and the subsequent production costs; finally, determining the shale oil enrichment and high-yield benefit sweet spot in the target work area based on the shale oil enrichment factor evaluation model, the engineering parameters required for the transformation of the shale oil wells, and the shale oil economic benefit evaluation model.

[0040] The corresponding shale oil enrichment high-yield benefit sweet spot determination device includes: an enrichment factor evaluation model establishment module, which is used to establish a shale oil enrichment factor evaluation model based on the drilling data and experimental data of the shale in the target work area; a benefit evaluation model establishment module, which is used to establish a shale oil economic benefit evaluation model based on the drilling and production costs of shale oil wells and the subsequent production costs; a high-yield benefit sweet spot determination module, which is used to determine the shale oil enrichment high-yield benefit sweet spot in the target work area based on the shale oil enrichment factor evaluation model, the engineering parameters required for transforming the shale oil wells, and the shale oil economic benefit evaluation model.

[0041] First, in the early exploration and evaluation stage, the present invention comprehensively optimizes multiple parameters from three aspects: geological enrichment factors, engineering high-yield conditions, and economic efficiency. Among them, geological enrichment factors mainly include shale thickness, TOC, porosity, free oil content (S1), etc., engineering high-yield condition parameters include shale permeability, brittle mineral content, ground stress, fracturing transformation scale, etc., and economic efficiency parameters include single well economic recoverable reserves (EUR), drilling and production costs, and effective stimulation volume (SRV). Then, through comprehensive analysis and evaluation of early geological enrichment factors, combined with comparative analysis of engineering transformation parameters, favorable development areas are selected. Based on the test results of exploration wells and evaluation wells and multi-round drilling and production cost optimization, the enrichment and high-yield benefit sweet spots in the area are selected, realizing a geological-engineering-economic integrated sweet spot evaluation method, and ultimately achieving both rapid optimization of shale oil sweet spot target areas and improving the effect of large-scale commercial development of shale oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 A schematic flow chart of a method for determining a shale oil enrichment high-yield benefit sweet spot according to an embodiment of the present invention;

[0044] Figure 2 This is a flow chart of step 100 of a method for determining a shale oil enrichment high-yield benefit sweet spot in an embodiment of the present invention;

[0045] Figure 3 This is a flow chart of step 300 of a method for determining a shale oil enrichment high-yield benefit sweet spot in an embodiment of the present invention;

[0046] Figure 4 This is a flow chart of a method for determining a shale oil enrichment high-yield benefit sweet spot in a specific embodiment of the present invention;

[0047] Figure 5 A logic diagram of a method for determining a shale oil enrichment high-yield benefit sweet spot in a specific embodiment of the present invention;

[0048] Figure 6 This is a block diagram of a device for determining a shale oil enrichment high-yield benefit sweet spot in an embodiment of the present invention;

[0049] Figure 7 Schematic diagram of the structure of an electronic device in an embodiment of the present invention. DETAILED DESCRIPTION

[0050] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0051] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0052] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products or devices. The embodiments in this application and the features described in the embodiments may be combined with each other unless there is a conflict. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0053] The acquisition, storage, use, and processing of data in the technical solution of this application comply with relevant laws and regulations.

[0054] Example 1:

[0055] The embodiment of the present invention provides a specific implementation method of a method for determining a shale oil enrichment high-yield benefit sweet spot, see Figure 1 , specifically including the following contents:

[0056] Step 100: Establishing a shale oil enrichment factor evaluation model based on the drilling data and experimental data of the shale in the target work area;

[0057] Step 200: Establishing a shale oil economic benefit evaluation model based on the drilling cost and subsequent production cost of the shale oil well;

[0058] Step 300: Determine the shale oil enrichment and high-yield benefit sweet spot in the target work area based on the shale oil enrichment factor evaluation model, the engineering parameters required for transforming the shale oil well, and the shale oil economic benefit evaluation model.

[0059] As can be seen from the above description, an embodiment of the present invention provides a method for determining a shale oil enrichment and high-yield benefit sweet spot, comprising: first, establishing a shale oil enrichment factor evaluation model based on the drilling data and experimental data of the shale in the target work area; then, establishing a shale oil economic benefit evaluation model based on the drilling and production costs of the shale oil wells and the subsequent production costs; finally, determining the shale oil enrichment and high-yield benefit sweet spot in the target work area based on the shale oil enrichment factor evaluation model, the engineering parameters required for transforming the shale oil wells, and the shale oil economic benefit evaluation model.

[0060] The present invention first comprehensively optimizes multiple parameters from three aspects: geological enrichment factors, engineering high-yield conditions, and economic efficiency in the early exploration and evaluation stage. Among them, geological enrichment factors mainly include shale thickness, TOC, porosity, free oil content (S1), etc., engineering high-yield condition parameters include shale permeability, brittle mineral content, ground stress, fracturing transformation scale, etc., and economic efficiency parameters include single well economic recoverable reserves (EUR), drilling and production costs, and effective transformation volume (SRV). Then, through comprehensive analysis and evaluation of early geological enrichment factors, combined with comparative analysis of engineering transformation parameters, favorable development areas are selected. Based on the test results of exploration wells and evaluation wells and multi-round drilling and production cost optimization, the enrichment and high-yield benefit sweet spots in the area are selected, realizing a geological-engineering-economic integrated sweet spot evaluation method, and ultimately achieving both rapid optimization of shale oil sweet spot target areas and improving the effect of large-scale commercial development of shale oil.

[0061] Example 2:

[0062] For step 100, its implementation process can be: after the shale oil risk well achieves an industrial oil flow breakthrough, based on the existing drilling, logging and experimental data, key parameters such as shale thickness, shale lithofacies combination type, TOC, porosity, organic matter abundance, S1, etc. are screened, and a shale oil enrichment factor evaluation model is established to calculate the shale oil resource and reserve scale in the target area and identify favorable areas for enrichment factors.

[0063] It's understandable that the industrial oil flow mentioned above is an economic indicator, determined through cost accounting, based on the daily production of a single well. From the start of drilling in an oil field until the completion of the first batch of production wells, the total investment and footage are calculated. Using this total investment as the cost, the cost per meter is calculated. The cost per well is then calculated for wells of varying depths. Based on the prevailing crude oil price, a ten-year payback period is required to determine the required daily oil and gas production, which serves as the minimum industrial oil and gas flow standard.

[0064] Regarding step 200, the costs of drilling a shale oil well include surface facility construction, drilling, and fracturing. These costs are relatively high, particularly due to the use of horizontal drilling and hydraulic fracturing technologies, which significantly increase drilling costs. Depending on geographical and technical conditions, the drilling cost of a single shale oil well can range from several million to tens of millions of US dollars, sometimes even higher.

[0065] Post-production costs include the following:

[0066] Operating costs: These include the purchase of materials such as water and sand, daily operations and maintenance at the well site, and ultimately wellhead closure and site restoration.

[0067] Production decline: The productivity of shale oil wells, especially horizontal wells, declines rapidly. The production rate has declined rapidly in the past few years, which requires continuous investment to maintain production, such as drilling new wells or re-fracture old wells.

[0068] Variable costs: These include changes in energy prices (especially gas and electricity) and service charges.

[0069] Environmental and regulatory factors: Tightening environmental regulations may increase the cost of treating wastewater and reducing pollution.

[0070] It can be understood that step 300 is different from a single-factor or dual-factor geological-engineering sweet spot evaluation, but rather an integrated evaluation of continental shale oil from multiple factors of geological-engineering-economic sweet spots.

[0071] In some embodiments of the present invention, see Figure 2 , step 100 includes:

[0072] Step 101: determining the shale thickness, shale lithofacies combination type, total organic carbon content, porosity, organic matter abundance, and pyrolysis parameters of the target work area based on the drilling data and the experimental data;

[0073] Shale thickness reflects the vertical depth of the shale layer and is directly related to the amount of recoverable resources per well. Greater thickness generally indicates higher potential recoverable resources. Thicker shale layers provide greater storage capacity for oil and gas, but they can also increase the complexity and cost of drilling and completion.

[0074] Shale lithofacies associations are the combination of physical, chemical, and biological characteristics of shale sediments, reflecting the depositional environment, organic matter type, and diagenetic processes. Shale lithofacies directly influence the pore structure, organic matter content, maturity, and other geological properties of the shale, which in turn influence the generation, storage, and recoverability of oil and gas.

[0075] The main shale lithofacies association types include:

[0076] Terrigenous clastic lithofacies, which is mainly composed of terrestrial clastic materials, such as sand, silt and clay.

[0077] Carbonate facies, composed primarily of carbonate minerals such as calcite and dolomite, typically form in marine environments. Carbonate facies are common in marine basins with high organic matter production, favoring the generation and storage of oil and gas.

[0078] Siliceous rock facies contains a high proportion of siliceous materials such as diatomite, pyroxene and quartz. Siliceous rock facies usually have good porosity and permeability, which is conducive to the storage and flow of oil and gas.

[0079] Organic-rich lithofacies contain a high proportion of organic matter and are deposited in anoxic or semi-anoxic environments. The type, maturity, and content of organic matter directly influence hydrocarbon generation. This lithofacies is a prime target for shale oil and gas reservoirs because high organic matter content indicates greater hydrocarbon potential.

[0080] Sulfur-bearing lithofacies, formed in reducing environments, contain a high proportion of sulfides. Although sulfur-bearing lithofacies may not be the primary target for shale oil and gas exploration, their presence can affect the quality and development costs of oil and gas.

[0081] It is understood that factors that influence the type of shale lithofacies association include depositional environment, geological history, and the source of organic matter.

[0082] Sedimentary environment: The sedimentary environment (such as deep sea, shallow sea, lake or river) determines the type and distribution of lithofacies.

[0083] Geological History: The geological history and tectonic activity of an area influence the nature and distribution of sediments.

[0084] Source of organic matter: The type of organic matter (such as terrestrial plants, marine algae, etc.) and preservation conditions have an important impact on the oil and gas generation potential.

[0085] Total organic carbon (TOC) is an important indicator of the organic matter content in rocks and is crucial for assessing their oil and gas generation potential. The higher the TOC, the more organic matter the rock contains, and the greater its potential for oil and gas generation.

[0086] Porosity, which refers to the proportion of a rock's volume that is pore space, is a key parameter affecting its ability to store oil and gas. Rocks with higher porosity can store more oil and gas, but the impact of pore connectivity and size on oil and gas extractability also needs to be considered.

[0087] In addition to TOC, which quantifies the amount of organic matter, the type and maturity of organic matter are also very important, determining the ability and type of oil or gas to be generated. Favorable organic matter type and maturity can improve the efficiency and quality of oil and gas generation.

[0088] Pyrolysis parameters: Pyrolysis analysis (such as Tmax, S1, S2 and other parameters) can be used to evaluate the maturity, generation potential and generated hydrocarbons of organic matter.

[0089] S1: The amount of light hydrocarbons generated, reflecting the existing free hydrocarbons in the rock.

[0090] S2: The amount of hydrocarbons generated from organic matter during heating, reflecting the generation potential of organic matter.

[0091] Tmax: The temperature at which the maximum amount of hydrocarbons is produced, an indicator of maturity.

[0092] Step 102: Establishing the shale oil enrichment factor evaluation model according to the shale thickness, shale lithofacies combination type, total organic carbon content, porosity, organic matter abundance and pyrolysis parameters.

[0093] In some embodiments of the present invention, see Figure 3 , step 300 includes:

[0094] Step 301: establishing a shale oil high-yield condition evaluation model based on the shale oil enrichment factor evaluation model and the engineering parameters;

[0095] Preferably, the engineering parameters of step 301 include key engineering parameters such as shale oil permeability, fracture development degree, brittle mineral content, ground stress, total injection fluid volume, proppant dosage, etc. for shale oil well fracturing transformation. Specifically:

[0096] Permeability: The permeability of shale determines the flow of liquids through it. The higher the permeability, the better the recovery effect.

[0097] Fracture development degree: The fracture development degree directly determines the path of gas and liquid propagation in shale. The higher the development degree, the better the mining effect.

[0098] Brittle mineral content: The brittle mineral content directly determines the compressibility of shale, or the volume change after compression. A higher brittle mineral content results in lower compressibility and potentially better mining results.

[0099] Ground stress: Ground stress affects the structure and shape of shale. High ground stress may cause shale deformation and cracking, thus affecting mining results.

[0100] Total fluid volume injected: The amount of fluid injected directly determines the scale and speed of mining. The larger the fluid volume, the better the mining effect.

[0101] Proppant dosage: Proppants are typically used to fill cracks and pores in shale to increase the fluidity of the produced fluid. The amount and type of proppant can affect the production effect.

[0102] Step 302: Determine the shale oil enrichment and high-yield benefit sweet spot based on the shale oil enrichment factor evaluation model, the shale oil high-yield condition evaluation model, and the shale oil economic benefit evaluation model.

[0103] In some embodiments of the present invention, the shale oil enrichment factor evaluation model is used to calculate the shale oil resources and reserves in the target area to identify the favorable areas for enrichment factors.

[0104] In some embodiments of the present invention, the shale oil high-yield condition evaluation model is used to evaluate the test production of the shale oil well to identify favorable areas for high-yield conditions.

[0105] In some embodiments of the present invention, the shale oil economic benefit evaluation model is used to determine the economic benefit favorable area of ​​the target work area.

[0106] In some embodiments of the present invention, before step 100, a method for determining a shale oil enrichment high-yield benefit sweet spot further includes:

[0107] Test whether the shale oil well production meets industrial oil flow standards.

[0108] Industrial oil and gas flow standards include industrial oil and gas flow standards for oil and gas wells and industrial oil and gas flow standards for reservoirs. The industrial oil and gas flow standards for oil and gas wells refer to the lower limit of oil and gas production of oil and gas wells. The industrial oil and gas flow standards for reservoirs refer to the lower limit of oil and gas production of reservoirs in industrial oil and gas wells, that is, the lower limit of effective thickness testing. It is the starting point for reserve calculations, and its high or low often causes systematic errors in the entire reserve calculation. The method to determine the standard limit of oil and gas production in reservoirs is to demonstrate the economically reasonable minimum oil production index value for oil reservoir development, that is, to demonstrate the minimum recoverable reserves of a single well during the development period. Due to the different geographical conditions and geological and oil production conditions of various regions, the standard limit values ​​of oil production index for reservoirs in different oil fields vary greatly.

[0109] The standard limit for a reservoir's oil recovery index is determined by combining the specified oil production profit margin, crude oil sales price, and average recoverable crude oil reserves per well. These three factors are comprehensively evaluated when assessing the industrial value of crude oil reserves—that is, determining whether they are on-balance sheet reserves or off-balance sheet reserves. Meeting any one of these three conditions—reducing the profit margin, increasing the crude oil sales price, or increasing recoverable crude oil reserves—can convert some off-balance sheet reserves into on-balance sheet reserves.

[0110] It should be noted that while oil production profit margins and crude oil sales prices are purely economic, single-well recoverable reserves inherently encompass a significant amount of technological considerations. This is because single-well recoverable reserves depend on well pattern density, which in turn is related to development process and technical indicators, including ultimate crude oil recovery. It should also be noted that indefinitely increasing single-well recoverable reserves in order to improve development profitability, particularly for low-permeability reservoirs, can lead to erroneous conclusions when calculating development technical and economic indicators. This is because single-well recoverable reserves should be determined not only based on economic criteria but also taking into account the reservoir's geological and physical characteristics, as well as the technological and production possibilities of recovering these reserves from a single well.

[0111] Given a given recoverable reserve volume, profitability depends not only on the crude oil sales price but also on the reservoir development timeline. This is because the longer a well remains in production, the higher the production costs. Therefore, to profitably develop large, difficult-to-recover off-balance sheet reserves, advanced oil recovery technologies must be employed to shorten the development cycle.

[0112] Based on the reserves recovered from a single well and the development time, the average oil well production, or oil recovery index, can be calculated. This demonstrates that the oil recovery index is the primary parameter determining the profitability of developing crude oil reserves. It also serves as a standard for determining the recoverable reserves of a single well and the boundary for demarcating reservoir formations.

[0113] To more conveniently and accurately evaluate shale oil sweet spots for well placement or development pilot area deployment, and to improve the effectiveness of shale oil exploration and development, embodiments of the present invention provide a geological-engineering-economic integrated evaluation method for continental shale oil sweet spots. This method, unlike single-factor or dual-factor geological-engineering sweet spot evaluation, integrates multiple factors of geological-engineering-economic sweet spots to evaluate continental shale oil. Its characteristics are: (1) Rapid acquisition of key geological-engineering-economic parameters to accurately evaluate shale oil sweet spots, providing support for subsequent reserve submission and large-scale production; (2) A multi-factor evaluation method is implemented, providing technical support for objective and comprehensive evaluation of shale oil sweet spots and large-scale, efficient development.

[0114] Example 3:

[0115] In a specific embodiment, the present invention also takes the Bohai Bay Basin as an example to provide a specific embodiment of a method for determining a shale oil enrichment high-yield benefit sweet spot, see Figure 4 as well as Figure 5 , specifically including the following steps.

[0116] S1: After achieving an industrial oil flow breakthrough in a shale oil risk well, key parameters such as shale thickness, shale lithofacies combination type, TOC, porosity, organic matter abundance, and S1 are screened based on existing drilling, logging, and experimental data. A shale oil enrichment factor evaluation model is established to calculate the shale oil resources and reserves in the target area and identify favorable areas for enrichment factors.

[0117] S2: Based on the enrichment factor evaluation model and combined with key engineering parameters such as shale oil permeability, fracture development, brittle mineral content, ground stress, total injected fluid volume, and proppant dosage implemented in shale oil well fracturing, a shale oil high-yield condition evaluation model is established to assess the final test production of shale oil wells and identify favorable areas for high-yield conditions;

[0118] The characterization parameters of the fracture development degree in step S2 are mainly used to describe the development of fractures in the rock. The fracture development degree includes:

[0119] Fracture density refers to the number of fractures per unit volume or area. It is a direct indicator of fracture development. Fracture density directly affects the physical properties of rock, such as permeability and strength.

[0120] Fracture spacing: This refers to the average distance between two adjacent fractures, reflecting the uniformity of fracture distribution. A smaller fracture spacing means denser fractures, which may reduce the strength of the rock.

[0121] Fracture width (opening): This refers to the distance between the rock interfaces on either side of a fracture. Fracture opening is important for assessing rock permeability; larger fracture openings facilitate fluid flow.

[0122] Crack length: The actual length of a single crack. Long cracks may pass through the entire rock mass and have a significant impact on the overall performance of the rock.

[0123] Fracture direction: The orientation of a fracture in space, usually expressed as an azimuth. Fracture directionality has a significant impact on fluid flow paths, rock anisotropy, and other factors.

[0124] Fracture area ratio: This refers to the ratio of the total fracture area per unit volume of rock to the rock volume. This parameter helps assess the comprehensive impact of fractures on rock physical properties.

[0125] Fracture connectivity: describes the degree of connection between fractures. A fracture system with good connectivity is conducive to fluid migration and storage.

[0126] It's understandable that a high content of brittle minerals means the rock is more susceptible to fracturing, which helps improve shale gas extraction efficiency. XRD analysis of shale samples can accurately identify the mineral types and relative concentrations within the sample, such as brittle minerals (such as quartz, feldspar, and carbonates) and non-brittle minerals (such as clay minerals).

[0127] In addition, the content of brittle minerals can be indirectly evaluated by measuring the content of specific elements (such as Si, Al, Ca, etc.) in rock samples and combining them with mineral chemical calculations.

[0128] S3: Considering the drilling and production costs during the implementation of shale oil wells and the subsequent optimization and cost reduction paths, as well as analyzing the effective stimulation volume (SRV) and ultimate recoverable reserves (EUR) of shale oil wells, a shale oil economic benefit evaluation model is established to identify the economically favorable areas.

[0129] The stimulated reservoir volume (SRV) of a shale oil well refers to the area where, through stimulation measures such as fracturing, previously low-permeability shale reservoirs are transformed into highly permeable pathways, effectively increasing production capacity. SRV is a key indicator of the effectiveness of fracturing stimulation in shale oil and gas wells and is directly related to post-well production and economic benefits.

[0130] In traditional oil and gas field development, reservoir permeability is relatively high, allowing oil and gas to flow easily through rock pores. However, shale oil and gas reservoirs, due to their unique geological characteristics, including extremely low permeability and porosity, have poor fluidity. Therefore, hydraulic fracturing and other technical means are needed to increase rock permeability and improve production efficiency.

[0131] Hydraulic fracturing involves injecting high-pressure fracturing fluid (typically water with a certain proportion of sand and chemical additives) downhole to create fractures in the rock. The formation and extension of these fractures can significantly increase the rock's permeability, thereby creating an effective remodeling volume. The size of the SRV is influenced by a variety of factors, including: the properties and injection volume of the fracturing fluid; the technical parameters of the fracturing operation, such as the number of fracturing stages, fracture length, and fracture spacing; the geological characteristics of the reservoir, such as the mechanical properties of the rock and the distribution of natural fractures; and the post-fracturing fluid return and management methods.

[0132] Estimated Ultimate Recovery (EUR) refers to the total amount of oil and gas expected to be produced from a field or well. This metric is often used to assess the economic value and development potential of oil and gas projects and is a key parameter in the oil and gas industry.

[0133] The estimation of EUR involves many factors, including geological conditions, reservoir characteristics, production history, mining technology, market conditions, etc. For shale oil and gas wells, the estimation of EUR is particularly complex because shale reservoirs have unique geological characteristics, such as low permeability, low porosity, and complex fracture systems. The following are some key factors affecting EUR: Geological conditions: including reservoir thickness, area, rock type, oil and gas saturation, etc. Reservoir characteristics: such as permeability, porosity, original oil and gas reservoir pressure, etc. Mining technology: The mining technology used, such as hydraulic fracturing and horizontal drilling, can significantly affect EUR. Production history and dynamic data: By analyzing existing production data, such as production decline curves, a more accurate prediction of EUR can be made. Market and economic conditions: Economic factors such as oil and gas prices and mining costs will also affect the final recoverable reserves.

[0134] S4: The shale oil enrichment factor evaluation model and favorable area established in step S1 are the geological sweet spots, the shale oil high-yield condition evaluation model and favorable area established in step S2 are the engineering sweet spots, and the shale oil economic benefit evaluation model and favorable area established in step S3 are the economic sweet spots. The favorable areas of each model are superimposed to determine the distribution range of the shale oil sweet spot favorable area, which is the enrichment and high-yield benefit sweet spot.

[0135] The method of step S1 to step S2 is applied to the lower third and upper fourth sub-members of Shahejie Formation in Niuzhuang, Minfeng and Bonan depressions in Jiyang Depression of Bohai Bay Basin. The geological enrichment factors include the widespread development of laminar carbonate mixed shale oil, the thickness of favorable lithofacies exceeds 100m, the S1 content is 0.4-23.2mg / g, the average TOC content is 2.39-4.66%, the Ro is between 0.6-0.9%, and the porosity is between 3.4-11.7%. The high-yield conditions include high-angle The density of severe fractures is 1 to 6 per meter, the fracturing fluid volume is generally greater than 60,000 cubic meters, and the sand addition volume exceeds 3 cubic meters. Based on the analysis of drilling and production costs of single-well pre-exploration and evaluation wells, the average single-well drilling and production cost is controlled below 50 million yuan per well, and the EUR is predicted to be above 46,000 tons, which has a good rate of return. Through the enrichment and high-yield sweet spot evaluation method, the deployment and implementation of single-well breakthrough, well group test, large-well group evaluation and reserve increase, and large-scale production in Niuzhuang, Jiyang Depression and Minfeng Sag were scientifically and effectively guided.

[0136] A specific embodiment of the present invention provides a method for determining shale oil enrichment and high-yield sweet spots. This method can evaluate continental shale oil sweet spots in the early exploration or evaluation stages. It is applicable to continental shale oil sweet spots in fault basins and depression-type shale oil sweet spots in central and western China. By employing an integrated geology-engineering-economic multi-factor sweet spot evaluation method, this method improves the efficiency of continental shale oil exploration and development and accelerates the development of shale oil in China. Compared with existing single-factor or dual-factor geology-engineering sweet spot evaluation methods, this method comprehensively evaluates key parameters, rapidly and accurately evaluates shale oil sweet spots, is applicable to different shale oil types, and can simultaneously increase shale oil reserves and production, with broad application prospects.

[0137] In summary, unlike single-factor or dual-factor geological-engineering sweet spot evaluation methods, the enrichment and high-yield benefit sweet spot evaluation method of the present invention realizes the multi-factor integrated evaluation of the geological-engineering-economic sweet spot of continental shale oil. Its characteristics are as follows: (1) Rapid acquisition of key geological-engineering-economic parameters to achieve the purpose of accurately evaluating shale oil sweet spots, providing support for subsequent reserve submission and large-scale production; (2) A multi-factor evaluation method is realized, providing technical support for objective and comprehensive evaluation of shale oil sweet spots and large-scale benefit development. (3) It provides resource guarantee for accelerating shale oil development and achieving stable crude oil production. This method has been widely used in the Bohai Bay Basin, the Northern Jiangsu Basin, the Songliao Basin, the Ordos Basin, and the Junggar Basin.

[0138] Example 4:

[0139] Based on the same inventive concept, the embodiments of the present application also provide a device for determining a shale oil enrichment high-yield benefit sweet spot, which can be used to implement the method described in the above embodiments, such as the following embodiments. Since the principle of solving the problem by the shale oil enrichment high-yield benefit sweet spot determination device is similar to that of the shale oil enrichment high-yield benefit sweet spot determination method, the implementation of the shale oil enrichment high-yield benefit sweet spot determination device can refer to the implementation of the shale oil enrichment high-yield benefit sweet spot determination method, and the repeated parts will not be repeated. As used below, the term "unit" or "module" can be a combination of software and / or hardware that implements a predetermined function. Although the system described in the following embodiments is preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and conceived.

[0140] The embodiment of the present invention provides a specific implementation of a shale oil enrichment high-yield benefit sweet spot determination device that can realize a shale oil enrichment high-yield benefit sweet spot determination method, see Figure 6 A device for determining a shale oil enrichment high-yield benefit sweet spot comprises:

[0141] The enrichment factor evaluation model establishment module 10 is used to establish a shale oil enrichment factor evaluation model based on the drilling data and experimental data of the shale in the target work area;

[0142] A benefit evaluation model establishment module 20 is used to establish a shale oil economic benefit evaluation model based on the drilling and production costs and subsequent production costs of the shale oil well;

[0143] The high-yield and high-efficiency sweet spot determination module 30 is used to determine the shale oil enrichment and high-yield and high-efficiency sweet spot in the target work area based on the shale oil enrichment factor evaluation model, the engineering parameters required for transforming the shale oil well, and the shale oil economic benefit evaluation model.

[0144] In some embodiments of the present invention, the enrichment factor evaluation model establishment module includes:

[0145] a key parameter screening unit, configured to determine the shale thickness, shale lithofacies combination type, total organic carbon content, porosity, organic matter abundance, and pyrolysis parameters of the target work area based on the drilling data and the experimental data;

[0146] The enrichment factor evaluation model establishment unit is used to establish the shale oil enrichment factor evaluation model according to the shale thickness, shale lithofacies combination type, total organic carbon content, porosity, organic matter abundance and pyrolysis parameters.

[0147] In some embodiments of the present invention, the high-yield benefit sweet spot determination module includes:

[0148] A high-yield condition evaluation model establishment unit, configured to establish a shale oil high-yield condition evaluation model based on the shale oil enrichment factor evaluation model and the engineering parameters;

[0149] A high-yield condition evaluation model determination unit is used to determine the shale oil enrichment high-yield benefit sweet spot based on the shale oil enrichment factor evaluation model, the shale oil high-yield condition evaluation model and the shale oil economic benefit evaluation model.

[0150] In some embodiments of the present invention, the shale oil enrichment factor evaluation model is used to calculate the shale oil resource and reserve scale of the target work area to identify favorable areas for enrichment factors.

[0151] In some embodiments of the present invention, the shale oil high-yield condition evaluation model is used to evaluate the test production of the shale oil well to identify favorable areas for high-yield conditions.

[0152] In some embodiments of the present invention, the shale oil economic benefit evaluation model is used to determine the economic benefit favorable area of ​​the target work area.

[0153] In some embodiments of the present invention, a device for determining a shale oil enrichment high-yield benefit sweet spot further includes:

[0154] The product testing module is used to test whether the production of the shale oil well meets the industrial oil flow standard.

[0155] As can be seen from the above description, an embodiment of the present invention provides a device for determining a shale oil enrichment high-yield benefit sweet spot, comprising: an enrichment factor evaluation model establishment module, for establishing a shale oil enrichment factor evaluation model based on the drilling data and experimental data of the shale in the target work area; a benefit evaluation model establishment module, for establishing a shale oil economic benefit evaluation model based on the drilling and production costs of the shale oil wells and the subsequent production costs; a high-yield benefit sweet spot determination module, for determining the shale oil enrichment high-yield benefit sweet spot in the target work area based on the shale oil enrichment factor evaluation model, the engineering parameters required for transforming the shale oil wells, and the shale oil economic benefit evaluation model.

[0156] First, in the early exploration and evaluation stage, the present invention comprehensively optimizes multiple parameters from three aspects: geological enrichment factors, engineering high-yield conditions, and economic efficiency. Among them, geological enrichment factors mainly include shale thickness, TOC, porosity, free oil content (S1), etc., engineering high-yield condition parameters include shale permeability, brittle mineral content, ground stress, fracturing transformation scale, etc., and economic efficiency parameters include single well economic recoverable reserves (EUR), drilling and production costs, and effective stimulation volume (SRV). Then, through comprehensive analysis and evaluation of early geological enrichment factors, combined with comparative analysis of engineering transformation parameters, favorable development areas are selected. Based on the test results of exploration wells and evaluation wells and multi-round drilling and production cost optimization, the enrichment and high-yield benefit sweet spots in the area are selected, realizing a geological-engineering-economic integrated sweet spot evaluation method, and ultimately achieving both rapid optimization of shale oil sweet spot target areas and improving the effect of large-scale commercial development of shale oil.

[0157] Embodiment 5:

[0158] The embodiments of the present application also provide a specific implementation of an electronic device capable of implementing all steps of the method for determining a shale oil enrichment high-yield benefit sweet spot in the above embodiment, see Figure 7 , electronic equipment specifically includes the following:

[0159] Processor 1201, memory 1202, communications interface 1203 and bus 1204;

[0160] The processor 1201, the memory 1202, and the communication interface 1203 communicate with each other via the bus 1204; the communication interface 1203 is used to implement information transmission between the server device and the client device and other related devices;

[0161] The processor 1201 is configured to call a computer program in the memory 1202. When the processor executes the computer program, all steps of the method for determining the shale oil enrichment high-yield benefit sweet spot in the above embodiment are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0162] Establish a shale oil enrichment factor evaluation model based on the drilling data and experimental data of the shale in the target work area;

[0163] Establishing a shale oil economic benefit evaluation model based on the drilling and production costs and subsequent production costs of the shale oil well;

[0164] The shale oil enrichment and high-yield benefit sweet spots in the target work area are determined based on the shale oil enrichment factor evaluation model, the engineering parameters required for transforming shale oil wells, and the shale oil economic benefit evaluation model.

[0165] In some embodiments of the present invention, establishing a shale oil enrichment factor evaluation model based on the drilling data and experimental data of the shale in the target work area includes:

[0166] Determine the shale thickness, shale lithofacies combination type, total organic carbon content, porosity, organic matter abundance, and pyrolysis parameters of the target work area based on the drilling data and the experimental data;

[0167] The shale oil enrichment factor evaluation model is established based on the shale thickness, shale lithofacies combination type, total organic carbon content, porosity, organic matter abundance and pyrolysis parameters.

[0168] In some embodiments of the present invention, determining the shale oil enrichment and high-yield benefit sweet spot in the target work area based on the shale oil enrichment factor evaluation model, the engineering parameters required for transforming the shale oil well, and the shale oil economic benefit evaluation model includes:

[0169] Establishing a shale oil high-yield condition evaluation model based on the shale oil enrichment factor evaluation model and the engineering parameters;

[0170] The shale oil enrichment and high-yield benefit sweet spot is determined based on the shale oil enrichment factor evaluation model, the shale oil high-yield condition evaluation model and the shale oil economic benefit evaluation model.

[0171] In some embodiments of the present invention, the shale oil enrichment factor evaluation model is used to calculate the shale oil resource and reserve scale of the target work area to identify favorable areas for enrichment factors.

[0172] In some embodiments of the present invention, the shale oil high-yield condition evaluation model is used to evaluate the test production of the shale oil well to identify favorable areas for high-yield conditions.

[0173] In some embodiments of the present invention, the shale oil economic benefit evaluation model is used to determine the economic benefit favorable area of ​​the target work area.

[0174] In some embodiments of the present invention, before establishing the shale oil enrichment factor evaluation model based on the drilling data and experimental data of the shale in the target work area, the method further includes:

[0175] Test whether the shale oil well production meets industrial oil flow standards.

[0176] Example 6:

[0177] The embodiments of the present application also provide a computer-readable storage medium capable of implementing all steps of the method for determining the shale oil enrichment, high-yield, and benefit sweet spot in the above-mentioned embodiment. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, all steps of the method for determining the shale oil enrichment, high-yield, and benefit sweet spot in the above-mentioned embodiment are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0178] Establish a shale oil enrichment factor evaluation model based on the drilling data and experimental data of the shale in the target work area;

[0179] Establishing a shale oil economic benefit evaluation model based on the drilling and production costs and subsequent production costs of the shale oil well;

[0180] The shale oil enrichment and high-yield benefit sweet spots in the target work area are determined based on the shale oil enrichment factor evaluation model, the engineering parameters required for transforming shale oil wells, and the shale oil economic benefit evaluation model.

[0181] In some embodiments of the present invention, establishing a shale oil enrichment factor evaluation model based on the drilling data and experimental data of the shale in the target work area includes:

[0182] Determine the shale thickness, shale lithofacies combination type, total organic carbon content, porosity, organic matter abundance, and pyrolysis parameters of the target work area based on the drilling data and the experimental data;

[0183] The shale oil enrichment factor evaluation model is established based on the shale thickness, shale lithofacies combination type, total organic carbon content, porosity, organic matter abundance and pyrolysis parameters.

[0184] In some embodiments of the present invention, determining the shale oil enrichment and high-yield benefit sweet spot in the target work area based on the shale oil enrichment factor evaluation model, the engineering parameters required for transforming the shale oil well, and the shale oil economic benefit evaluation model includes:

[0185] Establishing a shale oil high-yield condition evaluation model based on the shale oil enrichment factor evaluation model and the engineering parameters;

[0186] The shale oil enrichment and high-yield benefit sweet spot is determined based on the shale oil enrichment factor evaluation model, the shale oil high-yield condition evaluation model and the shale oil economic benefit evaluation model.

[0187] In some embodiments of the present invention, the shale oil enrichment factor evaluation model is used to calculate the shale oil resource and reserve scale of the target work area to identify favorable areas for enrichment factors.

[0188] In some embodiments of the present invention, the shale oil high-yield condition evaluation model is used to evaluate the test production of the shale oil well to identify favorable areas for high-yield conditions.

[0189] In some embodiments of the present invention, the shale oil economic benefit evaluation model is used to determine the economic benefit favorable area of ​​the target work area.

[0190] In some embodiments of the present invention, before establishing the shale oil enrichment factor evaluation model based on the drilling data and experimental data of the shale in the target work area, the method further includes:

[0191] Test whether the shale oil well production meets industrial oil flow standards.

[0192] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences from the other embodiments. In particular, the hardware + program embodiments are generally similar to the method embodiments, so the description is relatively simple. For relevant parts, refer to the description of the method embodiments.

[0193] The foregoing description of this specification describes specific embodiments. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in an order different from that described in the embodiments and still achieve the desired results. Furthermore, the processes depicted in the accompanying drawings do not necessarily require the specific order shown or the sequential order to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0194] Although the present application provides method operation steps such as embodiments or flowcharts, more or fewer operation steps may be included based on conventional or non-creative work. The order of steps listed in the embodiments is only one way of executing the steps among many steps and does not represent the only execution order. When an actual device or client product is executed, it can be executed in the order shown in the embodiments or the drawings or in parallel (for example, in a parallel processor or multi-threaded processing environment).

[0195] For the convenience of description, the above devices are described in terms of functions divided into various modules. Of course, when implementing the embodiments of this specification, the functions of each module can be implemented in the same or multiple software and / or hardware, or the modules that implement the same function can be implemented by a combination of multiple sub-modules or sub-units, etc. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0196] Those skilled in the art will also appreciate that, in addition to implementing the controller in pure computer-readable program code, it is entirely possible to implement the same functionality by logically programming the method steps in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, embedded microcontrollers, and the like. Therefore, such a controller can be considered a hardware component, and the devices included therein for implementing various functions can also be considered structures within the hardware component. Alternatively, the devices for implementing various functions can be considered both software modules implementing the method and structures within the hardware component.

[0197] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0198] Memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.

[0199] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between the various embodiments can be referenced across them. Each embodiment focuses on the differences from the other embodiments. In particular, since the system embodiments are generally similar to the method embodiments, the description is relatively simple. For relevant parts, reference can be made to the description of the method embodiments. Throughout this specification, reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the embodiments in this specification. In this specification, the schematic representations of these 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 any one or more embodiments or examples. Furthermore, those skilled in the art may combine and integrate the different embodiments or examples, and features of different embodiments or examples, described in this specification, without conflict.

[0200] The above description is merely an example of the embodiments of this specification and is not intended to limit the embodiments of this specification. For those skilled in the art, various modifications and variations of the embodiments of this specification are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of this specification shall be included within the scope of the claims of the embodiments of this specification.

Claims

1. A method for determining the sweet spot for shale oil enrichment and high yield efficiency, characterized in that: include: Establish a shale oil enrichment factor evaluation model based on the drilling data and experimental data of the shale in the target work area; Establishing a shale oil economic benefit evaluation model based on the drilling and production costs and subsequent production costs of the shale oil well; The shale oil enrichment and high-yield benefit sweet spots in the target work area are determined based on the shale oil enrichment factor evaluation model, the engineering parameters required for transforming shale oil wells, and the shale oil economic benefit evaluation model.

2. The method for determining the sweet spot for shale oil enrichment and high yield efficiency according to claim 1, characterized in that: The shale oil enrichment factor evaluation model is established based on the drilling data and experimental data of the shale in the target work area, including: Determine the shale thickness, shale lithofacies combination type, total organic carbon content, porosity, organic matter abundance, and pyrolysis parameters of the target work area based on the drilling data and the experimental data; The shale oil enrichment factor evaluation model is established based on the shale thickness, shale lithofacies combination type, total organic carbon content, porosity, organic matter abundance and pyrolysis parameters.

3. The method for determining the sweet spot for shale oil enrichment and high yield efficiency according to claim 1, characterized in that: Determining the shale oil enrichment and high-yield benefit sweet spot in the target work area based on the shale oil enrichment factor evaluation model, the engineering parameters required for transforming the shale oil well, and the shale oil economic benefit evaluation model includes: Establishing a shale oil high-yield condition evaluation model based on the shale oil enrichment factor evaluation model and the engineering parameters; The shale oil enrichment and high-yield benefit sweet spot is determined based on the shale oil enrichment factor evaluation model, the shale oil high-yield condition evaluation model and the shale oil economic benefit evaluation model.

4. The method for determining the sweet spot for shale oil enrichment and high yield efficiency according to claim 1, characterized in that: The shale oil enrichment factor evaluation model is used to calculate the shale oil resources and reserve scale in the target work area to identify favorable areas for enrichment factors.

5. The method for determining the sweet spot for shale oil enrichment and high yield efficiency according to claim 3, characterized in that: The shale oil high-yield condition evaluation model is used to evaluate the test production of the shale oil well to identify favorable high-yield condition areas.

6. The method for determining the sweet spot for shale oil enrichment and high yield efficiency according to claim 1, characterized in that: The shale oil economic benefit evaluation model is used to determine the economically favorable areas in the target work area.

7. The method for determining the sweet spot for shale oil enrichment and high yield efficiency according to any one of claims 1 to 6, characterized in that: Before establishing the shale oil enrichment factor evaluation model based on the drilling data and experimental data of the shale in the target work area, the method further includes: Test whether the shale oil well production meets industrial oil flow standards.

8. A device for determining the sweet spot for shale oil enrichment and high yield efficiency, characterized in that: include: The enrichment factor evaluation model establishment module is used to establish a shale oil enrichment factor evaluation model based on the drilling data and experimental data of the shale in the target work area; A benefit evaluation model establishment module is used to establish a shale oil economic benefit evaluation model based on the drilling and production costs and subsequent production costs of the shale oil well; A high-yield and high-efficiency sweet spot determination module is used to determine the shale oil enrichment and high-yield and high-efficiency sweet spot in the target work area based on the shale oil enrichment factor evaluation model, the engineering parameters required for transforming shale oil wells, and the shale oil economic benefit evaluation model.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steps of the method for determining the shale oil enrichment and high-yield benefit sweet spot according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for determining the shale oil enrichment high-yield benefit sweet spot according to any one of claims 1 to 7 are implemented.

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