Method and device for establishing three-dimensional geologic model of depleted gas reservoir

Abstract

The invention relates to the technical field of petroleum and natural gas exploration and development, in particular to a method and device for establishing a three-dimensional geologic model of an exhaustion type gas reservoir gas storage. The method comprises the following steps: establishing an initial three-dimensional geological model group of the depleted gas reservoir by utilizing geological data; performing sensitivity analysis on the key constraint parameters to obtain a primary three-dimensional geologic model group from the initial three-dimensional geologic model group; the key constraint parameters represent parameters influencing target reserves; the sensitivity analysis is to analyze the influence of the change of the key constraint parameters on the initial three-dimensional geologic model group; and performing historical fitting on the primarily selected three-dimensional geologic model group, and establishing a three-dimensional geologic model based on a fitting result. According to the method, the modeling steps are divided into three steps of generation, primary selection and optimization for the first time, and when the method is applied to three-dimensional modeling, the workload is greatly reduced, meanwhile, rapid modeling can be achieved, and the modeling result is relatively reliable.

Description

Technical Field

[0001] The invention relates to the technical field of oil and natural gas exploration and development, and in particular to a method and a device for establishing a three-dimensional geological model of a depleted gas reservoir. Background Art

[0002] Gas reservoir type gas storage is the main type of natural gas storage, which is mainly used to ensure the safety of natural gas supply and seasonal peak demand, and is an important part of the natural gas storage and transportation system. The safety and stability of gas storage is an important guarantee for long-term and efficient operation. At present, most gas reservoir type underground gas storages are rebuilt from depleted gas reservoirs. This type of gas reservoir has the characteristics of early development time, long production time, and limited data due to the limitation of the times; therefore, it is impossible to establish a relatively reliable geological model based on limited data, which has a great impact on the feasibility demonstration of reservoir construction or storage capacity parameter design.

[0003] In the prior art, such as the "A Three-Dimensional Geological Modeling Method for Reservoirs" with publication number CN105844708A and the "Three-Dimensional Geological Modeling Method for Shale Gas Reservoirs" with publication number CN105787803A, on the one hand, they only focus on the establishment and accuracy of single well models, and then establish modeling software. Insufficient consideration is given to planar heterogeneity, which may lead to the inability to ensure the reliability of the model. On the other hand, they still follow the traditional modeling process and methods, which have strict requirements on data conditions and cumbersome processing and interpretation processes. At the same time, the screening model is still mainly based on manual screening, which results in a large workload for modeling but low efficiency. Summary of the invention

[0004] In order to solve the problems that traditional modeling methods have strict data requirements, long modeling cycles, and difficulty in ensuring reliability, the present invention proposes a method and device for establishing a three-dimensional geological model of a depleted gas reservoir gas storage. The method and device can break through the limitations of various types of data and quickly establish a relatively reliable geological body model based on limited data, which serves the evaluation of the construction of depleted gas reservoir gas storage in complex carbonate rocks and their long-term efficient operation, and has very important guiding significance in the feasibility demonstration of the construction or the storage capacity parameter design stage.

[0005] In order to solve any of the above technical problems, the specific technical solutions of the embodiments of this specification are as follows:

[0006] In one aspect, the present invention provides a method for establishing a three-dimensional geological model of a depleted gas reservoir, the method comprising:

[0007] Using geological data to establish an initial three-dimensional geological model set of depleted gas reservoirs;

[0008] Performing sensitivity analysis on key constraint parameters to obtain a preliminary three-dimensional geological model group from the initial three-dimensional geological model group; the key constraint parameters represent parameters that affect target reserves; the sensitivity analysis is to analyze the impact of changes in the key constraint parameters on the initial three-dimensional geological model group;

[0009] Performing history matching on the preliminarily selected three-dimensional geological model group, and establishing a three-dimensional geological model based on the fitting results.

[0010] Furthermore, the geological data includes at least one of the following: gas reservoir structure data, reservoir data, fluid data and production dynamic data.

[0011] Further, performing sensitivity analysis on key constraint parameters to obtain a preliminary selected three-dimensional geological model group from the initial three-dimensional geological model group includes:

[0012] Performing a single factor sensitivity analysis on the key constraint parameter to obtain a first analysis result;

[0013] Adjusting the range of the first analysis result to determine the single factor impact analysis result affecting the target reserves;

[0014] Determine target reserves based on dynamic reserves of gas reservoirs;

[0015] The initial three-dimensional geological model group is screened according to the single factor impact analysis results and the target reserves to obtain a preliminary three-dimensional geological model group.

[0016] Furthermore, the method further comprises:

[0017] The initial three-dimensional geological model group is screened based on the dynamic and static reserve ratio.

[0018] Further, performing history matching on the preliminarily selected three-dimensional geological model group and establishing a three-dimensional geological model based on the fitting result includes:

[0019] Perform historical matching on the preliminarily selected three-dimensional geological model group, and confirm the preferred three-dimensional geological model group according to the fitting results;

[0020] The preferred three-dimensional geological model group is verified to establish a three-dimensional geological model.

[0021] Furthermore, verifying the preferred three-dimensional geological model group to establish a three-dimensional geological model includes: verifying the preferred three-dimensional geological model group through a reservoir thickness map, an energy storage coefficient map, a high-quality reservoir distribution map, and a seismic reservoir prediction map.

[0022] Further, verifying the preferred three-dimensional geological model group through a reservoir thickness map, an energy storage coefficient map, a high-quality reservoir distribution map, and a seismic reservoir prediction map includes:

[0023] Compare the fitting results with the data distribution trend of the high-quality reservoir distribution map to see if they are consistent;

[0024] If yes, refer to the seismic reservoir prediction map and determine the matching degree between the preferred three-dimensional geological model group and the reservoir thickness map and the energy storage coefficient map;

[0025] The preferred three-dimensional geological model group with the highest degree of fit is selected from the preferred three-dimensional geological model groups with a matching degree greater than a preset threshold as the three-dimensional geological model.

[0026] In another aspect, the present invention provides a device for establishing a three-dimensional geological model of a depleted gas reservoir, the device comprising:

[0027] The first model building unit is used to build an initial three-dimensional geological model group of a depleted gas reservoir gas storage reservoir using geological data;

[0028] A model preliminary selection unit is used to perform sensitivity analysis on key constraint parameters to obtain a preliminary selected three-dimensional geological model group from the initial three-dimensional geological model group; the key constraint parameters represent parameters that affect target reserves; the sensitivity analysis is to confirm the impact of changes in the key constraint parameters on the initial three-dimensional geological model group;

[0029] The second model building unit is used to perform history matching on the primary selected three-dimensional geological model group and build a three-dimensional geological model based on the fitting result.

[0030] On the other hand, the present invention further provides a computer device, comprising a memory, a processor, and a computer program stored in the memory, wherein the processor implements the above method when executing the computer program.

[0031] On the other hand, the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program implements the above method when executed by a processor.

[0032] Finally, the present invention also provides a computer program product, which includes a computer program, and the computer program implements the above method when executed by a processor.

[0033] Compared with the prior art, the method for establishing a three-dimensional geological model of a depleted gas reservoir in the present invention for the first time divides the modeling steps into three steps: generation, preliminary selection and optimization. When applied to three-dimensional modeling, it not only greatly reduces the workload, but also achieves rapid modeling, and the modeling results are relatively reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the embodiments of this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 Shown is a flow chart of a method for establishing a three-dimensional geological model of a depleted gas reservoir gas storage in an embodiment of this specification;

[0036] Figure 2 Shown is a histogram of model geological reserves in the embodiments of this specification;

[0037] Figure 3 Shown is a cyclone diagram of the influence of a single factor in the embodiments of this specification;

[0038] Figure 4 Shown is a schematic diagram of the history matching results in the embodiments of this specification;

[0039] Figure 5 The figure shows a structural diagram of a device for establishing a three-dimensional geological model of a depleted gas reservoir in an embodiment of the present specification;

[0040] Figure 6 The figure is a schematic diagram of the structure of a computer device in an embodiment of the present specification.

[0041]

Description of reference numerals

[0042] 201, a first model building unit;

[0043] 202, Model Preliminary Selection Unit;

[0044] 203, a second model building unit;

[0045] 602. Computer equipment;

[0046] 604, processor;

[0047] 606. Memory;

[0048] 608, driving mechanism;

[0049] 610, input / output module;

[0050] 612. Input devices;

[0051] 614. Output device;

[0052] 616. Presentation equipment;

[0053] 618. Graphical user interface;

[0054] 620, network interface;

[0055] 622, communication link;

[0056] 624. Communication bus. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of this specification to clearly and completely describe the technical solutions in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of them. Based on the embodiments in the embodiments of this specification, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of this specification.

[0058] It should be noted that the terms "first", "second", etc. in the description and claims of the embodiments of this specification and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of this specification described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, device, product or equipment 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 inherent to these processes, methods, products or equipment.

[0059] It should be noted that the acquisition, storage, use, and processing of data in the technical solution of this application are in compliance with the relevant provisions of relevant laws and regulations. The order of steps listed in the embodiment is only one way of executing the steps among many steps, and does not represent the only execution order. When the actual system or device product is executed, it can be executed in the order or in parallel according to the method shown in the embodiment or the accompanying drawings.

[0060] The specific embodiment of the present invention discloses a method for establishing a three-dimensional geological model of a depleted gas reservoir. Figure 1 As shown, the method includes:

[0061] Step 101, using geological data to establish an initial three-dimensional geological model group of a depleted gas reservoir gas storage. Specifically, the initial three-dimensional geological model group established using geological data should basically meet the data conditions of the work area. The initial three-dimensional geological model group is a system that summarizes various information and interpretation results. Its essence is to use three-dimensional modeling technology and geological exploration technology to simulate the spatial entity of the depleted gas reservoir gas storage in three dimensions. The specific establishment method can adopt any method of establishing a three-dimensional geological model in the prior art, which will not be repeated in the present invention.

[0062] Step 102, conduct sensitivity analysis on key constraint parameters to obtain a preliminary three-dimensional geological model group from the initial three-dimensional geological model group; the key constraint parameters represent parameters that affect the target reserves; the sensitivity analysis is to analyze the impact of changes in the key constraint parameters on the initial three-dimensional geological model group. In the sensitivity analysis of key constraint parameters, since the key constraint parameters that affect the initial three-dimensional geological model are uncertain, sensitivity analysis of multiple parameters is carried out in step 102, specifically including: for the uncertain parameters in the initial three-dimensional geological model that cannot be changed, such as boundaries, partitions, and attribute control bodies in gas reservoir recognition, a three-dimensional geological model is built respectively, and each model performs reserve uncertainty analysis on random modeling parameters such as attributes and gas-water interfaces, and the results are summarized and analyzed to obtain the single factor impact analysis results that affect the target reserves. Figure 2 As shown, it is a histogram of model geological reserves in the embodiment of this specification, the ordinate is the model geological reserve ratio, the unit is percentage, and the abscissa is the size of the reserve value, the unit is cubic meter.

[0063] Step 103, historical matching is performed on the preliminary selected three-dimensional geological model group, and a three-dimensional geological model is established based on the matching result. Specifically, historical matching is performed on the preliminary selected three-dimensional geological model group based on historical data to ensure the reliability of the model.

[0064] On the basis of conventional modeling, the present invention adds sensitivity analysis of key constraint parameters and historical data fitting to screen the model, makes full use of limited data, and establishes a relatively reliable geological model, which has very important guiding significance in the feasibility demonstration of reservoir construction or the reservoir capacity parameter design stage.

[0065] In one embodiment of the present specification, the geological data includes at least one of the following: gas reservoir structure data, reservoir data, fluid data and production performance data.

[0066] In one embodiment of the present specification, performing sensitivity analysis on key constraint parameters to obtain a preliminary selected three-dimensional geological model group from the initial three-dimensional geological model group includes:

[0067] Performing a single factor sensitivity analysis on the key constraint parameter to obtain a first analysis result;

[0068] The range of the first analysis result is adjusted to determine the single factor impact analysis result affecting the target reserves. Specifically, the key factor adjustment range is formulated in combination with the degree of understanding of the gas reservoir, the data reliability analysis results and the modeling experience, and the range of the first analysis result is adjusted to determine the single factor impact analysis result affecting the target reserves. Figure 3 Shown is a cyclone diagram of the influence of single factors in the embodiments of this specification, wherein the single factors included are variable porosity starting point, variable gas-water interface, large east zone, medium east zone, and small east zone.

[0069] The target reserves are determined based on the dynamic reserves of the gas reservoir. Specifically, the dynamic reserves of the gas reservoir are used as the lower limit of the target reserves.

[0070] The initial three-dimensional geological model group is screened according to the single factor impact analysis results and the target reserves to obtain a preliminary three-dimensional geological model group.

[0071] In one embodiment of the present specification, the method further includes: screening the initial three-dimensional geological model group based on the dynamic and static reserve ratio. For different types of gas reservoirs, the dynamic and static reserve ratio is used as the lower limit for screening the initial three-dimensional geological model group. Specifically, the ratio of the dynamic reserves of conventional gas reservoirs to the model geological reserves is 0.8, and the ratio of the dynamic reserves of water gas reservoirs to the model geological reserves is 0.6 as the basic ratio, and the final acceptable dynamic and static reserve ratio range is adjusted according to the development characteristics of the gas reservoir. The model geological reserves are the reserves that meet the dynamic and static reserve ratio limit threshold, which is greater than the target reserves.

[0072] In one embodiment of the present specification, performing history matching on the preliminarily selected three-dimensional geological model group and establishing a three-dimensional geological model based on the fitting result includes:

[0073] Perform historical matching on the preliminary selected 3D geological model group, and confirm the preferred 3D geological model group based on the fitting results. The more accurate the historical matching results are, the closer the attribute distribution of the model is to the actual situation. Specifically, in the process of historical matching, the models whose degree of conformity between the preliminary selected 3D geological model group and the historical data is greater than 80% are extracted to form the preferred 3D geological model group.

[0074] The preferred three-dimensional geological model group is verified to establish a three-dimensional geological model.

[0075] In one embodiment of the present specification, the method further comprises: verifying the preferred three-dimensional geological model group through a reservoir thickness map, an energy storage coefficient map, a high-quality reservoir distribution map, and a seismic reservoir prediction map.

[0076] In one embodiment of the present specification, verifying the preferred three-dimensional geological model group through a reservoir thickness map, an energy storage coefficient map, a high-quality reservoir distribution map, and a seismic reservoir prediction map includes:

[0077] Compare the fitting results with the data trends of the high-quality reservoir distribution map to see if they are consistent;

[0078] If yes, refer to the seismic reservoir prediction map and determine the matching degree between the preferred three-dimensional geological model group and the reservoir thickness map and the energy storage coefficient map;

[0079] The preferred three-dimensional geological model group with the highest degree of fit is selected from the preferred three-dimensional geological model groups with a matching degree greater than a preset threshold as the three-dimensional geological model.

[0080] Specifically, firstly, the fitting result is compared with the data distribution of the high-quality reservoir distribution map to see whether it is consistent. If it is consistent, the seismic reservoir prediction map is further referenced to determine the matching degree of the preferred three-dimensional geological model group with the reservoir thickness map and the energy storage coefficient map. In the embodiment of the present invention, the preset threshold of the matching degree is 90%, that is, the preferred three-dimensional geological model group with a matching degree greater than 90% with the reservoir thickness map and the energy storage coefficient map is selected, and then the preferred three-dimensional geological model with the highest fitting degree is selected as the final three-dimensional geological model. Figure 4 The figure shows the fitting result of the historical fitting in the embodiment of this specification, the ordinate is the wellhead pressure, the unit is bar, and the abscissa is the time (date). The point data is the actual observation data of the gas field production history, and the continuous line data is the data calculated by the three-dimensional geological model of the present invention.

[0081] Based on the same inventive concept, the embodiment of this specification also provides a device for establishing a three-dimensional geological model of a depleted gas reservoir, such as Figure 5 As shown, the device comprises:

[0082] The first model building unit 201 is used to build an initial three-dimensional geological model group of a depleted gas reservoir gas storage reservoir using geological data;

[0083] The model preliminary selection unit 202 is used to perform sensitivity analysis on key constraint parameters to obtain a preliminary selected three-dimensional geological model group from the initial three-dimensional geological model group; the key constraint parameters represent parameters that affect target reserves; the sensitivity analysis is to confirm the impact of changes in the key constraint parameters on the initial three-dimensional geological model group;

[0084] The second model building unit 203 is used to perform history matching on the initially selected three-dimensional geological model group and build a three-dimensional geological model based on the fitting result.

[0085] like Figure 6As shown, a computer device provided in an embodiment of the present invention, the apparatus in this specification may be a computer device in this embodiment, and the method of the above-mentioned specification is executed. The computer device 602 may include one or more processors 604, such as one or more central processing units (CPUs), and each processing unit may implement one or more hardware threads. The computer device 602 may also include any memory 606, which is used to store any kind of information such as code, settings, data, etc. Non-limiting, for example, the memory 606 may include any one or more combinations of the following: any type of RAM, any type of ROM, flash memory device, hard disk, optical disk, etc. More generally, any memory may use any technology to store information. Further, any memory may provide volatile or non-volatile retention of information. Further, any memory may represent a fixed or removable component of the computer device 602. In one case, when the processor 604 executes an associated instruction stored in any memory or a combination of memories, the computer device 602 may perform any operation of the associated instruction. The computer device 602 also includes one or more drive mechanisms 608 for interacting with any memory, such as a hard disk drive mechanism, an optical disk drive mechanism, etc.

[0086] The computer device 602 may also include an input / output module 610 (I / O) for receiving various inputs (via input device 612) and for providing various outputs (via output device 614). A specific output mechanism may include a presentation device 616 and an associated graphical user interface 618 (GUI). In other embodiments, the input / output module 610 (I / O), input device 612, and output device 614 may not be included, and the computer device 602 may be used as a computer device in a network. The computer device 602 may also include one or more network interfaces 620 for exchanging data with other devices via one or more communication links 622. One or more communication buses 624 couple the components described above together.

[0087] The communication link 622 may be implemented in any manner, for example, through a local area network, a wide area network (e.g., the Internet), a point-to-point connection, etc., or any combination thereof. The communication link 622 may include any combination of hardwired links, wireless links, routers, gateway functions, name servers, etc. governed by any protocol or combination of protocols.

[0088] The embodiments of the present specification also provide a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program implements the above method when executed by a processor.

[0089] The embodiments of the present specification also provide a computer-readable instruction, wherein when a processor executes the instruction, the program therein causes the processor to execute the above method.

[0090] It should be understood that in the various embodiments of the present specification, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present specification.

[0091] It should also be understood that in the embodiments of this specification, the term "and / or" is only a description of the association relationship of the associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the embodiments of this specification generally indicates that the associated objects before and after are in an "or" relationship.

[0092] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed in the embodiments of this specification can be implemented with electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the embodiments of this specification.

[0093] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0094] In the several embodiments provided in the embodiments of this specification, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, 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, or it can be an electrical, mechanical or other form of connection.

[0095] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiments of this specification.

[0096] In addition, each functional unit in each embodiment of the present specification can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of software functional units.

[0097] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of this specification is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the embodiment of this specification. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program code.

[0098] The embodiments of this specification use specific embodiments to illustrate the principles and implementation methods of the embodiments of this specification. The description of the above embodiments is only used to help understand the methods and core ideas of the embodiments of this specification. At the same time, for those skilled in the art, according to the ideas of the embodiments of this specification, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the embodiments of this specification.

Claims

1. A method for establishing a three-dimensional geological model of an exhausted gas reservoir storage characterized in that the method includes establishing an initial three-dimensional geological model group of the exhausted gas reservoir storage by using geological data performing a sensitivity analysis on key constraint parameters to obtain a preliminary selected three-dimensional geological model group from the initial three-dimensional geological model group; the key constraint parameters characterize the parameters affecting the target reserves; the sensitivity analysis is to analyze the influence of the change of the key constraint parameters on the initial three-dimensional geological model group performing history matching on the preliminary selected three-dimensional geological model group and establishing a three-dimensional geological model based on the matching result 2. The method for establishing a three-dimensional geological model of an exhausted gas reservoir storage according to claim 1 characterized in that the geological data includes at least one of the following: gas reservoir structure data, reservoir data, fluid data, and production dynamic data 3. The method for establishing a three-dimensional geological model of an exhausted gas reservoir storage according to claim 1 characterized in that performing a sensitivity analysis on key constraint parameters to obtain a preliminary selected three-dimensional geological model group from the initial three-dimensional geological model group includes performing a single-factor sensitivity analysis on the key constraint parameters to obtain a first analysis result adjusting the range of the first analysis result to determine the single-factor influence analysis result affecting the target reserves determining the target reserves based on the dynamic reserves of the gas reservoir screening the initial three-dimensional geological model group according to the single-factor influence analysis result and the target reserves to obtain a preliminary selected three-dimensional geological model group 4. The method for establishing a three-dimensional geological model of an exhausted gas reservoir storage according to claim 3 characterized in that the method further includes screening the initial three-dimensional geological model group with the static-dynamic reserve ratio as a condition 5. The method for establishing a three-dimensional geological model of an exhausted gas reservoir storage according to claim 1 characterized in that performing history matching on the preliminary selected three-dimensional geological model group and establishing a three-dimensional geological model based on the matching result includes performing history matching on the preliminary selected three-dimensional geological model group, and confirming a preferred three-dimensional geological model group according to the matching result performing verification on the preferred three-dimensional geological model group to establish a three-dimensional geological model 6. The method for establishing a three-dimensional geological model of an exhausted gas reservoir storage according to claim 5 characterized in that performing verification on the preferred three-dimensional geological model group to establish a three-dimensional geological model includes: verifying the preferred three-dimensional geological model group through a reservoir thickness map, an energy storage coefficient map, a high-quality reservoir distribution map, and a seismic reservoir prediction map 7. The method for establishing a three-dimensional geological model of an exhausted gas reservoir storage according to claim 6 characterized in that verifying the preferred three-dimensional geological model group through a reservoir thickness map, an energy storage coefficient map, a high-quality reservoir distribution map, and a seismic reservoir prediction map includes comparing whether the data trends of the matching result and the high-quality reservoir distribution map are consistent if so, referring to the seismic reservoir prediction map and determining the matching degree of the preferred three-dimensional geological model group with the reservoir thickness map and the energy storage coefficient map Select the optimal 3D geological model with the highest fitting degree from the group of optimal 3D geological models whose matching degree is greater than the preset threshold as the 3D geological model.

8. An apparatus for establishing a 3D geological model of an underground gas storage in a depleted gas reservoir, characterized in that the apparatus comprises: a first model establishment unit configured to establish an initial group of 3D geological models of an underground gas storage in a depleted gas reservoir by using geological data; a model primary selection unit configured to perform sensitivity analysis on key constraint parameters to obtain a group of primary selected 3D geological models from the initial group of 3D geological models; the key constraint parameters represent parameters affecting target reserves; the sensitivity analysis is to confirm the influence of changes in the key constraint parameters on the initial group of 3D geological models; a second model establishment unit configured to perform history fitting on the group of primary selected 3D geological models and establish a 3D geological model based on the fitting results.

9. A computer device comprising a memory, a processor, and a computer program stored on the memory, characterized in that when the processor executes the computer program, the method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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