Method and device for dividing fault blocks

Abstract

The present invention provides a method and device for fault block division, the method comprising: performing fault level division on a target layer to obtain multiple faults after level division; analyzing the sealing properties of the faults after level division; determining the gas-water interface of the target layer; and performing fault block division on the target layer according to the sealing properties analysis results of the faults after level division and the gas-water interface. The present invention can accurately divide fault blocks.

Description

Technical Field

[0001] The invention relates to the field of oil and gas field development, and in particular to a method and device for dividing fault blocks. Background Art

[0002] In the study of complex fault-block oil and gas reservoirs, faults serve as important channels for oil and gas migration on the one hand, and as sealing conditions for oil and gas accumulation on the other hand, and have a dual role in oil and gas accumulation. When a fault is open, it can serve as a channel for oil and gas migration, that is, oil and gas can migrate laterally along the fault plane, from one plate of the fault to another, and can also migrate vertically along the fault plane to the upper reservoir; when a fault is closed, it can prevent oil and gas migration. The fault can prevent oil and gas from migrating through the plane laterally, and prevent oil and gas from migrating along the fault plane to the upper reservoir vertically. Therefore, fault closure is an important factor in the formation of oil and gas reservoirs and the control of the scale of oil and gas accumulation. At the same time, based on the study of fault closure, reasonable fault block division also affects the calculation of reserves and the formulation of subsequent reasonable development technology policies.

[0003] Therefore, in the development of complex fault-block oil and gas reservoirs, a method for accurate fault-block division is needed. Summary of the invention

[0004] The embodiment of the present invention provides a method for dividing fault blocks, so as to accurately divide fault blocks. The method includes:

[0005] The target layer is divided into fault levels to obtain faults after multiple division levels;

[0006] Analyze the closure of faults after classification;

[0007] Determine the gas-water interface of the target layer;

[0008] The fault blocks of the target layer are divided according to the sealing analysis results of the faults after classification and the gas-water interface.

[0009] The embodiment of the present invention provides a device for dividing fault blocks, which is used to accurately divide fault blocks. The device includes:

[0010] A fault level division module is used to divide the target layer into fault levels and obtain faults after multiple division levels;

[0011] The closure analysis module is used to analyze the closure of faults after classification;

[0012] A gas-water interface determination module, used to determine the gas-water interface of the target layer;

[0013] The fault block division module is used to divide the fault blocks of the target layer according to the sealing analysis results of the faults after the division level and the gas-water interface.

[0014] An embodiment of the present invention further provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned block division method when executing the computer program.

[0015] The embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for executing the above-mentioned method for dividing the broken blocks.

[0016] In the embodiment of the present invention, the target layer is divided into fault levels to obtain multiple faults after division; the sealing properties of the faults after division are analyzed; the gas-water interface of the target layer is determined; and the fault blocks of the target layer are divided according to the sealing properties analysis results and the gas-water interface of the faults after division. In the above process, various information is integrated, including fault level division, sealing properties analysis, and gas-water interface determination, so that the accuracy of the final determined fault block division is very high. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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 prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0018] Figure 1 A flowchart of a method for dividing fault blocks in an embodiment of the present invention;

[0019] Figure 2 The plane position distribution of 12 large-scale main control faults in the embodiment of the present invention;

[0020] Figure 3 A schematic diagram of using the fault growth index to determine the longitudinal closure of a large-scale fault provided in an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of determining the lateral closure of a large-scale fault by using the lithologic contact relationship between the two sides of the fault provided in an embodiment of the present invention;

[0022] Figure 5 This is a result diagram of a small-scale fault detection on the T-4 well in an embodiment of the present invention;

[0023] Figure 6 A schematic diagram of determining the gas-water interface using well logging data in an embodiment of the present invention;

[0024] Figure 7 A schematic diagram of determining the air-water interface using pressure test data in an embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of the result of fault block division in an embodiment of the present invention;

[0026] Fig. 9 A schematic diagram of a device for dividing fault blocks in an embodiment of the present invention;

[0027] Fig.10 Schematic diagram of a computer device in an embodiment of the present invention. DETAILED DESCRIPTION

[0028] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0029] In the description of this specification, the terms "include", "including", "have", "contain", etc. are all open terms, which mean including but not limited to. The descriptions with reference to the terms "one embodiment", "a specific embodiment", "some embodiments", "for example", etc. mean that the specific features, structures or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The order of steps involved in each embodiment is used to schematically illustrate the implementation of the present application, and the order of steps is not limited and can be appropriately adjusted as needed.

[0030] First, some nouns or terms appearing in the embodiments of the present invention are explained as follows:

[0031] The fault growth index refers to the ratio of the thickness of a stratum in the upper plate of the fault to the thickness of the stratum in the same layer in the lower plate. It can be used to indicate the rate of fault activity during the sedimentary period of the stratum, and is called the fault growth index. This index is a parameter that can determine the time and rate of extension and compression. The size of the growth index reflects the growth rate of the fault, that is, the activity intensity of the fault. The larger the ratio of the growth index, the greater the activity intensity of the fault. When the fault growth index is equal to 1, that is, the layer where the thickness difference of the corresponding strata in the upper and lower plates disappears, it means that the thickness of the two plates of the fault is equal and the fault activity stops; when the fault growth index is greater than 1, it means that the thickness of the upper plate is greater than that of the lower plate, and synsedimentary normal faulting occurs. The larger the value, the greater the normal faulting rate; when the fault growth index is less than 1, it means that the thickness of the upper plate is less than that of the lower plate, and synsedimentary reverse faulting occurs. The smaller the value, the greater the reverse faulting rate. By analyzing the fault growth index, the relative activity intensity and activity history of the growth fault can be quantitatively analyzed.

[0032] Well testing technology refers to the test of fluid flow in the formation. It is based on the theory of seepage mechanics and is a method of studying oil and gas field geology and oil and gas well engineering problems by testing formation pressure, temperature and flow changes. During the test, the changes in pressure and production of oil, gas and water wells caused by changes in the working system are measured. By analyzing these changes, the parameters of the oil and gas reservoir, the production capacity of the well and the completion quality, as well as related oil and gas reservoir problems are studied. In particular, it plays a role in implementing boundary properties and distances and calculating dynamic reserves.

[0033] Figure 1 FIG. 1 is a flow chart of a method for dividing a fault block in an embodiment of the present invention. Figure 1 As shown, the method includes:

[0034] Step 101, dividing the target layer into fault levels to obtain faults after multiple division levels;

[0035] Step 102, analyzing the sealing properties of the faults after classification;

[0036] Step 103, determining the gas-water interface of the target layer;

[0037] Step 104, dividing the fault blocks of the target layer according to the sealing analysis results of the faults after classification and the gas-water interface.

[0038] In the embodiment of the present invention, various information are integrated, including fault level division, closure analysis, and gas-water interface determination, so that the accuracy of the final block division is very high.

[0039] In one embodiment, the target layer is divided into fault levels to obtain faults after multiple division levels, including:

[0040] According to the division conditions of large-scale faults and small-scale faults, the target layer is divided into multiple large-scale faults and multiple small-scale faults using the seismic attribute body of the target layer.

[0041] In the specific implementation, the single well synthetic record of the work area is produced, the well seismic calibration is carried out, the target layer is clearly interpreted, and the fault is finely interpreted in the target layer using the coherent isoseismic attribute body, so as to classify the fault level. Since the breakpoints come from the profile, the fault combination needs to be carried out at a certain target level, and the fault is reasonably combined by combining the plane and the profile. The nature of the fault is clarified, and different levels of faults are divided according to the fault distance, extension length and other parameters of the fault.

[0042] Faults in nature are generally divided into the following categories: large-scale faults that run through the globe, namely latitudinal faults and radial faults, are called deep faults; those that run through the region and extend for hundreds of kilometers are generally called large faults; those that extend for tens of kilometers in a small area are generally called faults; ore-bearing structures, fracture groups, broken zones, etc. are generally called lowest-level faults. In practice, faults within the oil field are generally divided into faults and low-level faults, that is, large-level faults and small-level faults, and are divided by fault distance and extension length. More specifically, faults with a distance greater than 10 meters and an extension length greater than 1,500 meters are defined as large-level faults; faults with a distance less than 10 meters and an extension length less than 1,500 meters are defined as small-level faults.

[0043] In one embodiment, the main controlling faults can be further determined in the large-level faults to obtain the large-level main controlling faults, thereby laying a foundation for fault block division. Table 1 is an example of a target layer after fault level division, specifically 12 large-level main controlling faults are obtained. Figure 2 The planar position distribution of 12 large-scale main control faults in the embodiment of the present invention.

[0044] Table 1

[0045]

[0046]

[0047] The vertical and lateral closure of a large-scale fault depends not only on the lithology of the two sides of the fault, but also on the nature of the fault zone and the system state in which it is located. The geological conditions in different regions are different, and the influencing factors and the degree of their effects are also different. There are many factors that affect the closure of faults, including the mechanical properties of the fault, the dip angle of the fault plane, the strike, the activity of the fault, and the lithology of the two sides. According to the actual situation of the target layer data, the closure performance of the main fault can be analyzed with the fault distance as the basic element and the fault disconnection position as the auxiliary.

[0048] In one embodiment, analyzing the sealing properties of the faults after classification includes:

[0049] According to the growth index of large-scale faults, the vertical closure of large-scale faults is judged;

[0050] The lateral closure of a large-scale fault can be determined based on the corresponding lithological contact relationship between the two sides of the large-scale fault.

[0051] In the above embodiment, if the growth index of a large-scale fault is less than a set threshold, the large-scale fault is longitudinally closed, otherwise, the large-scale fault is longitudinally not closed. According to the corresponding lithological contact relationship of the two plates of the large-scale fault, the lateral closure of the large-scale fault is judged, including: if the corresponding lithological contact relationship of the two plates of the large-scale fault has lateral migration, the large-scale fault is laterally not closed, otherwise, the large-scale fault is laterally closed.

[0052] by Figure 2 Take the F-9 fault in the diagram as an example. This fault extends in a northeast direction and dips northwest. The fault extends for 7,600 meters and has a fault distance of 31 meters. Figure 3 This is a schematic diagram of using the fault growth index to determine the longitudinal closure of a large-scale fault provided in an embodiment of the present invention. According to the fault growth index analysis: vertically, from the deep J18 layer group to the shallow upper Plover segment, the fault growth index gradually decreases, reflecting that with the change of the stratum deposition age, the activity of the fault gradually weakens; horizontally, from the CR5706 survey line in the northeast to the CR5186 survey line in the southwest, the growth index value of each layer group gradually decreases and is close to 1, reflecting that the activity of the fault is gradually weakening, and the closure performance of the fault becomes better in the southwest direction. Figure 4 This is a schematic diagram of using the lithological contact relationship between the two sides of the fault to determine the lateral closure of a large-scale fault provided in an embodiment of the present invention. It can be seen that the two sides of the F-9 fault are mainly mudstone and mudstone contact, and there is no lateral migration, which also reflects that the lateral closure of the fault is good.

[0053] As for the determination of the sealing property of small-scale faults, it is generally difficult to judge whether they are sealed because of their small vertical fault distance. At this time, the detection radius of a single well can be interpreted based on well test data through well test interpretation. It can be shown that the reservoirs are interconnected within the detection radius, that is, the small faults within the detection radius of the well are not sealed.

[0054] In one embodiment, analyzing the sealing properties of the faults after classification includes:

[0055] The closure of small-scale faults can be determined based on the maximum detection radius obtained from the analysis of well test data.

[0056] Figure 5 This is a result diagram of the detection of small-scale faults in Well T-4 in an embodiment of the present invention. Figure 5 It can be seen that the detection radius of T-4 well reached 2700 meters within the 120-hour test time, and the controlled area was relatively large, indicating that the small faults within the detection radius were not closed.

[0057] There are many methods to determine the gas-water interface of the target layer. Two embodiments are given here. One of the embodiments uses logging data. A major task of logging interpretation is to conduct a comprehensive analysis of the fluid properties of the formation and provide accurate oil, gas, and water well sections. A comprehensive analysis of geology, logging curves, and processing results gives a reasonable analysis conclusion of the reservoir, that is, the conclusion of determining the oil, gas, and water layers. For the gas layer, the most important feature is that the resistivity value of the deep detection curve is relatively high, and due to the influence of natural gas, the acoustic time difference increases or the frequency jump phenomenon. At the same time, due to the low hydrogen index of the gas layer, the ability to decelerate fast neutrons is poor, and the ability to absorb gamma rays is also poor, resulting in a high neutron gamma value of the gas layer; in addition, the density porosity of the gas layer increases, the neutron porosity decreases, and the two curves form a better envelope area. For water layers, the natural potential curve shows positive or negative anomalies, and the anomaly amplitude is larger than that of gas layers; the microelectrode curve has a medium amplitude, with an obvious positive amplitude difference, but the amplitude is relatively lower than that of gas layers; the short electrode apparent resistivity curve has a higher amplitude while the long electrode apparent resistivity curve has a lower amplitude, the induction curve shows a high conductivity value, the acoustic time difference value is medium, and it is platform-shaped, and the well diameter is often smaller than the drill bit diameter.

[0058] In one embodiment, determining the gas-water interface of the target layer includes:

[0059] Based on the well logging data of the target layer, the gas layer and water layer are interpreted, and combined with the gas-water data, the gas-bottom interface information, the known gas-bottom interface information, the lowest gas-bottom interface information, the known water-bottom interface information and the water-top interface information are determined;

[0060] The gas-water interface of the target layer is determined according to the gas-bottom interface information, the known gas-bottom interface information, the lowest gas-bottom interface information, the known water-bottom interface information and the water-top interface information.

[0061] Figure 6 This is a schematic diagram of using logging data to determine the gas-water interface in an embodiment of the present invention. The gas-bottom interface information and water-top interface information of the T-5 well are given, and the gas-bottom interface information of the T-1 well is given, and the gas-water interface is finally determined.

[0062] Another embodiment of determining the gas-water interface is based on pressure test data, which can play an important role in determining the gas-water interface, dividing the pressure system, and determining the fluid density. In one embodiment, determining the gas-water interface of the target layer includes:

[0063] By regressing the gas layer pressure data measured at multiple points of the target layer, the gas layer pressure gradient line is obtained;

[0064] By regressing the water layer pressure data measured at multiple points of the target layer, a water layer pressure gradient line is obtained;

[0065] The depth corresponding to the intersection of the gas layer pressure gradient line and the water layer pressure gradient line is determined as the depth corresponding to the gas-water interface.

[0066] Figure 7 FIG. 1 is a schematic diagram of determining the air-water interface using pressure test data in an embodiment of the present invention. Figure 7 As shown in the figure, the gas layer pressure gradient line and the water layer pressure gradient line on a straight line indicate that they have the same pressure gradient. When the gas layer pressure gradient line and the water layer pressure gradient line intersect, the intersection point is the corresponding gas-water interface. At the same time, combined with the distribution characteristics of the gas layer and water layer obtained from the logging interpretation results, a reasonable gas-water interface is finally determined.

[0067] In step 105, the fault blocks of the target layer are divided according to the sealing analysis results of the classified faults and the gas-water interface.

[0068] This step mainly integrates the previous multi-information data, finally divides different fault blocks, determines the gas-water interface of different fault blocks, and provides a reliable geological basis for reserve calculation and development deployment.

[0069] Figure 8 This is a schematic diagram of the result of block division in an embodiment of the present invention. The target layer is divided into three blocks, and the gas-water interfaces are -4506 meters, -4532 meters and -4571 meters above sea level respectively.

[0070] In summary, in the method proposed in the embodiment of the present invention, the target layer is divided into fault levels to obtain multiple faults after division; the closure of the faults after division is analyzed; the gas-water interface of the target layer is determined; the gas-water interface of the target layer is determined; and the block division of the target layer is performed according to the closure analysis results and the gas-water interface of the faults after division. In the above process, various information is integrated, including fault level division, closure analysis, and gas-water interface determination, so that the accuracy of the final block division is very high.

[0071] The embodiment of the present invention further provides a device for dividing fault blocks, the principle of which is similar to the method for dividing fault blocks, and will not be described in detail here.

[0072] Fig. 9 FIG. 1 is a schematic diagram of a device for dividing a fault block in an embodiment of the present invention. Fig. 9 As shown, including:

[0073] The fault level division module 901 is used to divide the target layer into fault levels and obtain faults after multiple division levels;

[0074] A closure analysis module 902 is used to analyze the closure of the fault after classification;

[0075] The gas-water interface determination module 903 is used to determine the gas-water interface of the target layer;

[0076] The fault block division module 904 is used to divide the target layer into fault blocks according to the sealing analysis results and gas-water interface of the fault after the division level.

[0077] In one embodiment, the fault level classification module is specifically used to:

[0078] According to the division conditions of large-scale faults and small-scale faults, the target layer is divided into multiple large-scale faults and multiple small-scale faults using the seismic attribute body of the target layer.

[0079] In one embodiment, the closure analysis module is specifically used to:

[0080] According to the growth index of large-scale faults, the vertical closure of large-scale faults is judged;

[0081] The lateral closure of a large-scale fault can be determined based on the corresponding lithological contact relationship between the two sides of the large-scale fault.

[0082] In one embodiment, the closure analysis module is specifically used to:

[0083] The closure of small-scale faults can be determined based on the maximum detection radius obtained from the analysis of well test data.

[0084] In one embodiment, the air-water interface determination module is specifically used for:

[0085] Based on the well logging data of the target layer, the gas layer and water layer are interpreted, and combined with the gas-water data, the gas-bottom interface information, the known gas-bottom interface information, the lowest gas-bottom interface information, the known water-bottom interface information and the water-top interface information are determined;

[0086] The gas-water interface of the target layer is determined according to the gas-bottom interface information, the known gas-bottom interface information, the lowest gas-bottom interface information, the known water-bottom interface information and the water-top interface information.

[0087] In one embodiment, the air-water interface determination module is specifically used for:

[0088] By regressing the gas layer pressure data measured at multiple points of the target layer, the gas layer pressure gradient line is obtained;

[0089] By regressing the water layer pressure data measured at multiple points of the target layer, a water layer pressure gradient line is obtained;

[0090] The depth corresponding to the intersection of the gas layer pressure gradient line and the water layer pressure gradient line is determined as the depth corresponding to the gas-water interface.

[0091] In summary, in the device proposed in the embodiment of the present invention, the target layer is divided into fault levels to obtain multiple faults after division; the closure of the faults after division is analyzed; the gas-water interface of the target layer is determined; the gas-water interface of the target layer is determined; and the block division of the target layer is performed according to the closure analysis results and the gas-water interface of the faults after division. In the above process, various information is integrated, including fault level division, closure analysis, and gas-water interface determination, so that the accuracy of the final block division is very high.

[0092] An embodiment of the present application also provides a computer device, Fig.10 This is a schematic diagram of a computer device in an embodiment of the present invention. The computer device can implement all steps in the method for dividing the fault blocks in the above embodiment. The computer device specifically includes the following contents:

[0093] Processor (processor) 1001, memory (memory) 1002, communication interface (CommunicationsInterface) 1003 and communication bus 1004;

[0094] The processor 1001, the memory 1002, and the communication interface 1003 communicate with each other through the communication bus 1004; the communication interface 1003 is used to realize information transmission between relevant devices such as the server-side device, the detection device, and the user-side device;

[0095] The processor 1001 is used to call the computer program in the memory 1002. When the processor executes the computer program, all the steps in the method for segmenting the broken blocks in the above embodiment are implemented.

[0096] An embodiment of the present application also provides a computer-readable storage medium that can implement all the steps in the method for block division in the above embodiment. The computer-readable storage medium stores a computer program that implements all the steps in the method for block division in the above embodiment when the computer program is executed by a processor.

[0097] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, 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 disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0098] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0099] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0100] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0101] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for dividing fault blocks, characterized in that: include: The target layer is divided into fault levels to obtain faults after multiple division levels; Analyze the closure of faults after classification; Determine the gas-water interface of the target layer; According to the sealing analysis results of the faults after classification and the gas-water interface, the fault blocks of the target layer are divided; Determining the gas-water interface of the target layer, including: interpreting the gas layer and the water layer according to the well logging data of the target layer, and judging the gas-bottom interface information, the known gas-bottom interface information, the lowest gas-bottom interface information, the known water-bottom interface information and the water-top interface information in combination with the gas-water data; determining the gas-water interface of the target layer according to the gas-bottom interface information, the known gas-bottom interface information, the lowest gas-bottom interface information, the known water-bottom interface information and the water-top interface information; Determining the gas-water interface of the target layer includes: obtaining a gas layer pressure gradient line by regressing the gas layer pressure data measured at multiple points of the target layer; obtaining a water layer pressure gradient line by regressing the water layer pressure data measured at multiple points of the target layer; and determining that the depth corresponding to the intersection of the gas layer pressure gradient line and the water layer pressure gradient line is the depth corresponding to the gas-water interface.

2. The method for dividing fault blocks according to claim 1, characterized in that: The target layer is divided into fault levels to obtain faults at multiple levels, including: According to the division conditions of large-scale faults and small-scale faults, the target layer is divided into multiple large-scale faults and multiple small-scale faults using the seismic attribute body of the target layer.

3. The method for dividing fault blocks according to claim 2, characterized in that: Analyze the closure of the faults after classification, including: According to the growth index of large-scale faults, the vertical closure of large-scale faults is judged; The lateral closure of a large-scale fault can be determined based on the corresponding lithological contact relationship between the two sides of the large-scale fault.

4. The method for dividing fault blocks according to claim 2, characterized in that: Analyze the closure of the faults after classification, including: The closure of small-scale faults can be determined based on the maximum detection radius obtained from the analysis of well test data.

5. A device for dividing fault blocks, characterized in that: include: A fault level division module is used to divide the target layer into fault levels and obtain faults after multiple division levels; The closure analysis module is used to analyze the closure of faults after classification; A gas-water interface determination module, used to determine the gas-water interface of the target layer; The fault block division module is used to divide the fault blocks of the target layer according to the sealing analysis results and gas-water interface of the fault after the division level; The gas-water interface determination module is specifically used to: interpret the gas layer and water layer according to the well logging data of the target layer, and identify the gas-bottom interface information, known gas-bottom interface information, lowest gas-bottom interface information, known water-bottom interface information and water-top interface information in combination with the gas-water data; Determine the gas-water interface of the target layer according to the gas-bottom interface information, known gas-bottom interface information, lowest gas-bottom interface information, known water-bottom interface information and water-top interface information; The gas-water interface determination module is specifically used for: obtaining the gas layer pressure gradient line by regressing the gas layer measured pressure data of multiple points of the target layer; obtaining the water layer pressure gradient line by regressing the water layer measured pressure data of multiple points of the target layer; and determining the depth corresponding to the intersection of the gas layer pressure gradient line and the water layer pressure gradient line as the depth corresponding to the gas-water interface.

6. The device for dividing fault blocks according to claim 5, characterized in that: The fault level classification module is specifically used for: According to the division conditions of large-scale faults and small-scale faults, the target layer is divided into multiple large-scale faults and multiple small-scale faults using the seismic attribute body of the target layer.

7. The device for dividing fault blocks according to claim 6, characterized in that: The closure analysis module is specifically used for: According to the growth index of large-scale faults, the vertical closure of large-scale faults is judged; The lateral closure of a large-scale fault can be determined based on the corresponding lithological contact relationship between the two sides of the large-scale fault.

8. The device for dividing fault blocks according to claim 6, characterized in that: The closure analysis module is specifically used for: The closure of small-scale faults can be determined based on the maximum detection radius obtained from the analysis of well test data.

9. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 4 is implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program for executing the method according to any one of claims 1 to 4.

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