Method, system and equipment for depicting transverse structure of strike-slip fault zone and medium

Abstract

The invention provides a method, system and device for depicting a strike-slip fault zone transverse structure and a medium, and the method comprises the following steps: obtaining fault zone data, and building a strike-slip fault zone transverse structure geologic model; depicting the strike-slip fault zone in the strike-slip fault zone transverse structure geologic model by applying geophysical attributes to obtain a depicting result; three-dimensional space modeling is carried out on the strike-slip fault zone based on the depiction result, and transverse structure depiction of the strike-slip fault zone is completed; according to the method, accurate depiction of transverse different zone spaces can be achieved, when the method is used for fault zone well pattern deployment, the drilling encounter rate, the drilling success rate and the efficient well proportion of a reservoir can be increased, and then the carbonate oil and gas reservoir management and development level is improved.

Description

Technical Field

[0001] This invention relates to the field of exploration and development technology of fracture-vuggy carbonate oil and gas reservoirs, and particularly to a method, system, equipment and medium for characterizing the lateral structure of strike-slip fault zones. Background Technology

[0002] Studies have shown that in ultra-deep fault-controlled fracture-vuggy carbonate reservoirs, strike-slip fault zones are not only favorable channels for oil and gas transport but also favorable locations for the development of fracture-vuggy reservoirs and the accumulation of oil and gas. Under different stress conditions, the internal structure of strike-slip fault zones varies considerably. The transverse direction of the strike-slip fault, perpendicular to its strike direction, can be divided into multiple structural zones. Within these different structural zones, the scale and type of reservoir development, the degree of oil and gas enrichment, and the longitudinal and transverse connectivity differ, thus determining the different oil and gas scales and development methods of the fracture-vuggy reservoirs in different structural zones. Therefore, studying the transverse structure of strike-slip fault zones and accurately and effectively characterizing and representing them is crucial for the exploration and development of oil and gas reservoirs along the fault zones. Based on field measurements of strike-slip fault profiles, combined with logging and well logging data from drilled wells, especially horizontal wells that penetrate the fault zone, and fault zone imaging characteristics from high-density 3D data, a three-part transverse structure of the strike-slip fault zone was established. The reservoir space types, main reservoir controlling factors, connectivity modes and degrees, differences in oil-water distribution, and energy differences among different structural zones were studied to ensure the rationality of the modeling. Furthermore, based on high-precision 3D seismic data, sensitive attributes reflecting different structural zones were extracted. Drilling data was used to calibrate these sensitive attributes and determine thresholds, achieving a three-dimensional depiction of the spatial distribution of the fault zone structure. Finally, research on the oil and gas enrichment patterns of different transverse structural zones within the strike-slip fault zone was conducted to guide well location deployment and subsequent production enhancement measures, providing support for the rational development of the fault zone.

[0003] Fracture-vuggy carbonate reservoirs controlled by faults are the main type of oil reservoirs for increasing crude oil reserves and production in the Tarim Basin. The reservoir development and oil and gas enrichment of this type of oil and gas reservoir are mainly controlled by strike-slip fault zones. The early strike-slip fault characterization technology mainly includes two aspects: identification and description of strike-slip faults. Among them, strike-slip fault description technology mainly includes strike-slip fault classification, segmentation (along the strike of the strike-slip fault), and phase characterization. These technologies have basically realized the description of the differences in reservoir control and storage control characteristics of different strike-slip fault zones, different segments of the same strike-slip fault, and different phases of the fault. They have guided the early exploration and development of fracture-vuggy oil and gas reservoirs in strike-slip fault zones, but they cannot meet the needs of well network construction in the development stage. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a method, system, device and medium for characterizing the transverse structure of strike-slip fault zones, in order to solve the technical problems of incomplete and inadequate description of strike-slip faults in the existing related technologies.

[0005] This invention is achieved through the following technical solution:

[0006] A method for characterizing the transverse structure of a strike-slip fault zone includes the following steps:

[0007] Acquire fault zone data and establish a geological model of the transverse structure of the strike-slip fault zone;

[0008] Geophysical properties were applied to characterize the strike-slip fault zone in the geological model of the lateral structure of the strike-slip fault zone, and the characterization results were obtained.

[0009] Based on the characterization results, a three-dimensional spatial model of the strike-slip fault zone was created, and the transverse structure of the strike-slip fault zone was characterized.

[0010] Furthermore, the process of acquiring fault zone data and establishing a geological model of the lateral structure of the strike-slip fault zone is as follows:

[0011] Based on wellbore data and the development characteristics of different lateral parts of the strike-slip fault zone, a geological model of the lateral structure of the strike-slip fault zone is established. The wellbore data includes field outcrop observations of the strike-slip fault and well logging data.

[0012] The geological model of the transverse structure of the strike-slip fault zone includes reservoir characteristics, fluid characteristics, connectivity characteristics, and energy difference characteristics at different locations of the transverse fault zone.

[0013] Furthermore, the strike-slip fault zone is divided into a fault core, a fracture zone, and a fracture zone from the middle of the fault to both sides. The reservoir space type of the fault core is a cavern and fracture-cavity reservoir. The oil and gas filling of the fault core is from bottom to top, and the oil and gas reservoir is connected through the fault plane and the fracture-cavity body.

[0014] The reservoir space of the fracture zone is a fracture-cavity type and a cavity type reservoir. Oil and gas migrate laterally from the fracture core along the secondary fractures and fracture zones, and the fracture-cavity bodies are connected through fractures.

[0015] The reservoir space in the fracture zone is a fracture-void type reservoir, with oil and gas transported along the fracture network and connected by fracture connectivity.

[0016] Furthermore, the process of applying geophysical properties to characterize the strike-slip fault zone in the geological model of the lateral structure of the strike-slip fault zone, and obtaining the characterization results, is as follows:

[0017] Based on 3D seismic data, geophysical properties of strike-slip fault zones are extracted, and sensitive properties of different types of strike-slip fault zones are obtained based on the extracted geophysical properties.

[0018] Based on the sensitive attributes of different types of strike-slip fault zones and drilling data, establish threshold values ​​for different types of sensitive attributes;

[0019] Based on the threshold of sensitive attributes, the type of strike-slip fault zone is determined and characterized.

[0020] Furthermore, the strike-slip fracture zone includes a fracture core, a fracture fragmentation zone, and a crack zone;

[0021] The coherence-based ESP attribute is used to characterize the sensitive properties of the fracture core region;

[0022] Structural tensor properties are used to characterize the sensitive properties of fracture zone regions;

[0023] The automatic fault extraction (AFE) method was used to characterize the sensitive properties of the fracture zone region.

[0024] Furthermore, the threshold values ​​for sensitive attributes include: the threshold values ​​for sensitive attributes in the fracture core region, the threshold values ​​for sensitive attributes in the fracture break zone region, and the threshold values ​​for sensitive attributes in the crack zone region;

[0025] The sensitivity attribute threshold of the fracture core region is determined based on the values ​​of coherent attribute types at the venting and leakage points during the drilling process.

[0026] The sensitivity attribute threshold of the fracture zone is determined based on the average value of the structural tensor attributes at the location of Class I and Class II reservoirs as interpreted by well logging. If there are multiple wells, it is determined based on the arithmetic mean of the multiple wells.

[0027] The sensitivity attribute threshold for the fracture zone region is based on the attribute value of the Automatic Fault Extraction (AFE) method. If multiple wells exist, the threshold is determined based on the minimum value among the multiple wells.

[0028] Furthermore, the process of performing three-dimensional spatial modeling of the strike-slip fault zone based on the characterization results, and completing the characterization of the lateral structure of the strike-slip fault zone, is as follows:

[0029] The strike-slip fracture zone includes a fracture core, a fracture fragmentation zone, and a crack zone;

[0030] By fusing fracture zones within fracture zones, a fracture zone-fracture zone fusion body is obtained.

[0031] A fracture core is fused into the fracture zone-fracture zone fusion body to obtain a fracture zone-fracture zone-fracture core fusion body;

[0032] Based on the fusion of fracture zone, fracture fracture zone and fracture core, a three-dimensional spatial model was constructed to complete the characterization of the lateral structure of the strike-slip fracture zone.

[0033] A system for characterizing the transverse structure of strike-slip fault zones, comprising:

[0034] The preprocessing unit is configured as follows:

[0035] Used to acquire fault zone data and establish a geological model of the lateral structure of strike-slip fault zones;

[0036] The characterization unit is configured as follows:

[0037] It is used to characterize the strike-slip fault zone in the geological model of the lateral structure of the strike-slip fault zone by applying geophysical properties and obtain the characterization results;

[0038] The output unit is configured as follows:

[0039] Based on the characterization results, it is used to perform three-dimensional spatial modeling of strike-slip fault zones and complete the characterization of the transverse structure of strike-slip fault zones.

[0040] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the steps of a method for characterizing the transverse structure of a strike-slip fault zone.

[0041] A computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of a method for characterizing the transverse structure of a strike-slip fault zone.

[0042] Compared with the prior art, the present invention has the following beneficial technical effects:

[0043] This invention provides a method, system, equipment, and medium for characterizing the lateral structure of strike-slip fault zones, comprising the following steps: acquiring fault zone data and establishing a geological model of the lateral structure of the strike-slip fault zone; applying geophysical properties to characterize the strike-slip fault zone in the geological model of the lateral structure of the strike-slip fault zone, obtaining characterization results; and based on the characterization results, performing three-dimensional spatial modeling of the strike-slip fault zone to complete the characterization of the lateral structure of the strike-slip fault zone. This application can achieve accurate characterization of different lateral zones, and when used for well network deployment in fault zones, it can improve the drilling encounter rate, drilling success rate, and proportion of high-efficiency wells in reservoirs, thereby improving the management and development level of carbonate oil and gas reservoirs. Attached Figure Description

[0044] Figure 1 A flowchart illustrating a method for characterizing the transverse structure of a strike-slip fault zone according to an embodiment of this disclosure is shown.

[0045] Figure 2 A schematic diagram of the geological model of the transverse structure of the strike-slip fault zone in an embodiment of this disclosure is shown;

[0046] Figure 3 A structural diagram of the top surface of the target layer of the fracture zone in an embodiment of this disclosure is shown;

[0047] Figure 4 A cross-sectional view of ESP properties in an embodiment of this disclosure is shown;

[0048] Figure 5 A cross-sectional view of the structural tensor properties in an embodiment of this disclosure is shown;

[0049] Figure 6 An automatic fault extraction (AFE) fracture prediction attribute profile diagram is shown in an embodiment of this disclosure.

[0050] Figure 7 This diagram illustrates the lateral structure characterization of the strike-slip fault zone in an embodiment of this disclosure.

[0051] Figure 8 A three-dimensional spatial model of the strike-slip fault zone in an embodiment of this disclosure is shown. Detailed Implementation

[0052] The present invention will be further described in detail below with reference to specific embodiments. These descriptions are for explanation purposes only and are not intended to limit the scope of the invention.

[0053] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0054] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0055] Figure 1 This disclosure illustrates a method for characterizing the transverse structure of a strike-slip fault zone, comprising the following steps:

[0056] Acquire fault zone data and establish a geological model of the transverse structure of the strike-slip fault zone;

[0057] Geophysical properties were applied to characterize the strike-slip fault zone in the geological model of the lateral structure of the strike-slip fault zone, and the characterization results were obtained.

[0058] Based on the characterization results, a three-dimensional spatial model of the strike-slip fault zone was created, and the transverse structure of the strike-slip fault zone was characterized.

[0059] In a preferred embodiment of this disclosure, the process of acquiring fault zone data and establishing a geological model of the lateral structure of the strike-slip fault zone is as follows:

[0060] Based on field outcrop observations of strike-slip faults, well logging and other wellbore data, and analysis of development characteristics of different lateral parts of the strike-slip fault zone, a geological model of the lateral structure of the strike-slip fault zone is established.

[0061] like Figure 2 As shown, the geological model of the transverse structure of the strike-slip fault zone includes reservoir characteristics, fluid characteristics, connectivity characteristics, and energy difference characteristics at different locations of the transverse fault zone.

[0062] In a preferred embodiment of this disclosure, the strike-slip fault zone can be divided into a fault core, a fault fracture zone, and a fracture zone from the middle of the fault outwards. It should be noted that the fault core refers to the core part of the fault zone, that is, the part of the fault zone composed of fault rocks and associated structures, with the central slip zone of the main fault plane as its core. This part may be composed of non-cohesive fault rocks such as fault gouge, and its thickness is positively correlated with the total fault displacement. The fault fracture zone is a fractured area formed by the compression or fracturing of rock strata. This fracture zone can be formed due to crustal activity, earthquakes, and other factors, manifesting as a series of fractured and broken rock blocks. Under specific conditions, the fault fracture zone can serve as a barrier to the deformation of surrounding rock and the propagation of mining stress. The fracture zone is a geological phenomenon in which surface rock strata and soil crack under natural factors such as crustal activity and the action of water, or human factors such as pumping, irrigation, and excavation, forming a cracked area of ​​a certain length and width on the ground.

[0063] Specifically, the reservoir in the fracture core region is controlled by the fracturing of the main fracture and the dissolution of atmospheric freshwater. Its main reservoir space types are cave and fracture-cavity reservoirs. Its oil and gas filling is from bottom to top, the oil column height is large, and the oil and gas reservoirs are connected through the fault plane and fracture-cavity bodies. The fracture-cavity bodies are large in scale and the water body has strong energy.

[0064] The fracture zone is mainly controlled by secondary fractures and cracks, with weak atmospheric freshwater dissolution. Its reservoir space consists of fracture-cavity and pore-type reservoirs. Oil and gas migrate laterally from the fracture core along the secondary fractures and cracks. The oil column height is moderate, the fracture-cavity bodies are small in scale and connected through fractures, and the water energy is moderate to weak.

[0065] The fractured zone reservoir is mainly affected by fractures, developing into a fractured-vuggy reservoir. Oil and gas are transported along the fracture network, with small oil column height and small reservoir size. The reservoir is mainly oil-bearing due to fractures, and the connectivity is poor due to fracture interconnection.

[0066] In a preferred embodiment of this disclosure, the process of applying geophysical properties to characterize the strike-slip fault zone in the geological model of the lateral structure of the strike-slip fault zone, and obtaining the characterization result, is as follows:

[0067] Based on 3D seismic data, geophysical properties of strike-slip fault zones are extracted, and sensitive properties of different types of strike-slip fault zones are obtained based on the extracted geophysical properties.

[0068] Based on the sensitive attributes of different types of strike-slip fault zones and drilling data, establish threshold values ​​for different types of sensitive attributes;

[0069] Based on the threshold of sensitive attributes, the type of strike-slip fault zone is determined and characterized.

[0070] It should be noted that when characterizing strike-slip fault zones in geological models based on geophysical properties, the main reliance is on the differences in physical properties of different rocks and geological structures. These physical properties include density, magnetism, electrical properties, elasticity, etc., which can be measured and analyzed through geophysical exploration methods. In the study of strike-slip fault zones, geophysical methods can be used to reveal the internal structure, material composition, and movement characteristics of the fault zone.

[0071] Furthermore, the strike-slip fracture zone includes a fracture core, a fracture fragmentation zone, and a crack zone;

[0072] The coherence-based ESP attribute is used to characterize the sensitive properties of the fracture core region;

[0073] Structural tensor properties are used to characterize the sensitive properties of fracture zone regions;

[0074] The automatic fault extraction (AFE) method was used to characterize the sensitive properties of the fracture zone region.

[0075] It should be noted that the coherence-type ESP (Earth Structure Properties) attribute in geophysical exploration refers to a series of physical properties related to underground geological structures obtained through coherence analysis techniques. These properties are typically used to characterize features such as the continuity of underground rock strata, the distribution of fault zones, and the undulations of geological interfaces. Specifically, coherence-type ESP is a method based on seismic data or other geophysical data. It assesses the continuity of underground structures by calculating the similarity of seismic signals within different seismic traces or time windows. In seismic exploration, coherence analysis is often used to identify geological features such as fault zones, fractures, and lithological interfaces, because these features cause changes in the path, velocity, and amplitude of seismic wave propagation, thereby affecting the coherence of seismic signals.

[0076] When characterizing fractured zones, the structural tensor property primarily focuses on the local structural features of the region in images or data. Fractured zones are fracture zones formed in the Earth's crust due to the fracturing and displacement of rock strata under tectonic stress, typically manifesting as a series of fractured and broken rock blocks. By analyzing the gradient information around pixels in images or data, the structural tensor can summarize the main directions of gradients in a specified neighborhood and the degree of coherence of these directions. In fractured zones, due to the fracturing and displacement of rock strata, the gradient information in images or data will show significant changes.

[0077] The Automatic Fault Extraction (AFE) method, when characterizing fracture zones, primarily relies on seismic data or other geophysical data to identify and extract subsurface fracture structures. Although AFE is mainly designed for automatic fault identification and extraction, its principles and techniques can also be applied to fracture zone characterization. The core of AFE technology lies in analyzing the reflection, refraction, and scattering phenomena produced by geological anomalies (such as faults and fractures) encountered by seismic waves propagating in the subsurface medium. These anomalies alter the propagation characteristics of seismic waves, leaving specific signals or patterns in the seismic data. By analyzing and interpreting these signals or patterns, AFE technology can identify and extract subsurface fracture structures.

[0078] Furthermore, the threshold values ​​for sensitive attributes include: the threshold values ​​for sensitive attributes in the fracture core region, the threshold values ​​for sensitive attributes in the fracture break zone region, and the threshold values ​​for sensitive attributes in the crack zone region.

[0079] The sensitivity attribute threshold of the fracture core region is determined based on the values ​​of coherent attribute types at the venting and leakage points during the drilling process.

[0080] The sensitivity attribute threshold of the fracture zone is determined based on the average value of the structural tensor attributes at the location of Class I and Class II reservoirs as interpreted by well logging. If there are multiple wells, it is determined based on the arithmetic mean of the multiple wells.

[0081] The sensitivity attribute threshold for the fracture zone region is based on the attribute value of the Automatic Fault Extraction (AFE) method. If multiple wells exist, the threshold is determined based on the minimum value among the multiple wells.

[0082] In a preferred embodiment of this disclosure, the process of performing three-dimensional spatial modeling of the strike-slip fault zone based on the characterization results to complete the characterization of the lateral structure of the strike-slip fault zone is as follows:

[0083] The strike-slip fracture zone includes a fracture core, a fracture fragmentation zone, and a crack zone;

[0084] By fusing fracture zones within fracture zones, a fracture zone-fracture zone fusion body is obtained.

[0085] A fracture core is fused into the fracture zone-fracture zone fusion body to obtain a fracture zone-fracture zone-fracture core fusion body;

[0086] Based on the fusion of fracture zone, fracture fracture zone and fracture core, a three-dimensional spatial model was constructed to complete the characterization of the lateral structure of the strike-slip fracture zone.

[0087] One embodiment disclosed in this application is as follows:

[0088] like Figure 3 As shown, the F oilfield in the Halahatang oilfield of the basin area I Of the eight wells completed in the southern section of the fault zone, all showed strong "beaded" reflection characteristics on the seismic profile. However, the well completion tests showed high-yield oil wells, low-yield wells, and water wells. The reasons for the differences in results are unclear, which has restricted the development of oil reservoirs in the fault zone.

[0089] Carry out F I 7. Zoning description of strike-slip fault zones, determining the spatial distribution characteristics of the fault core, fracture zone, and crack zone of strike-slip fault zones.

[0090] like Figure 4 As shown, the characterization of the fracture core: After comparative analysis, it was found that the ESP coherence attribute can well characterize the fracture core. Using drilling information for calibration, the part of the ESP coherence attribute value greater than 120 corresponds to the response of the fracture core. Therefore, the threshold value greater than 120 was finally selected to characterize the fracture core.

[0091] like Figure 5 As shown, the characterization of fracture zones: After comparative analysis, it was found that structural tensor properties can effectively characterize fracture zones. The structural tensor properties were calibrated using drilling, surveying, and logging information, and a threshold value greater than 2200 was selected to characterize the distribution range of fracture zones.

[0092] like Figure 6 As shown, the prediction of fracture zones: After comparative analysis, it was found that the AFE attribute of the automatic fault extraction method can reflect the development location of fracture zones to a certain extent. The AFE attribute of the automatic fault extraction method was calibrated using drilling, logging and well logging information. Finally, a threshold value greater than 80 was selected to characterize fracture zones.

[0093] Based on the characterization results of the lateral structure of the strike-slip fault zone, we re-examine the oil and gas enrichment patterns of the fault zone and the reasons for the differences in the development effects of drilled wells: Through the characterization of the lateral structure of this fault zone, we found that:

[0094] ①. Fractured cavities located far from the fault core and outside the fault fracture zone cannot effectively connect to oil sources, resulting in weak oil and gas filling, and most wells drilled are water wells;

[0095] ②. Fractured bodies located outside the fault core but within the fault fracture zone, with oil and gas shifting laterally along the reservoir, and drilling generally produces low-yield wells;

[0096] ③. Fractured-cavitary bodies located directly on the fracture core have strong oil and gas filling, and drilling is mostly high-yield and high-efficiency.

[0097] Based on this understanding, in F I On the 7th fault zone, three wells drilled targeting the fractured cavity located on the fault core all achieved high yields, such as... Figure 7 As shown.

[0098] Based on the lateral characterization results of strike-slip faults, a well network deployment scheme for the fault zone was proposed, which greatly improved the development effect.

[0099] For fracture core oil and gas enrichment areas, a low-angle well and oblique fracture core trajectory design scheme is adopted to drill and expose as many high-quality reservoirs as possible while ensuring wellbore stability. Considering the strong connectivity of fracture core reservoirs, the well spacing is maintained at about 1 km. For the characteristics of fractured zone reservoirs, horizontal well drilling is used to increase the controlled reserves per well, with the horizontal well trajectory perpendicular to or intersecting the fracture strike at a large angle. For fracture zones, due to the small reserve size, they are currently not profitable to exploit, and no wells are drilled for the time being. Guided by this approach, six new wells were deployed in this fracture zone, all of which were successful. Currently, a cumulative oil production of 157,700 tons has been achieved, with an average daily production of 38.6 tons per well. It is projected that the final average cumulative production per well will exceed 50,000 tons. Figure 8 As shown.

[0100] This invention provides a system for characterizing the transverse structure of strike-slip fault zones, comprising:

[0101] The preprocessing unit is configured as follows:

[0102] Used to acquire fault zone data and establish a geological model of the lateral structure of strike-slip fault zones;

[0103] The characterization unit is configured as follows:

[0104] It is used to characterize the strike-slip fault zone in the geological model of the lateral structure of the strike-slip fault zone by applying geophysical properties and obtain the characterization results;

[0105] The output unit is configured as follows:

[0106] Based on the characterization results, it is used to perform three-dimensional spatial modeling of strike-slip fault zones and complete the characterization of the transverse structure of strike-slip fault zones.

[0107] In another embodiment of the present invention, a computer device is provided, comprising a processor and a memory. The memory stores a computer program, which includes program instructions. The processor executes the program instructions stored in the computer storage medium. The processor may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing and control core of the terminal, suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions in the computer storage medium to achieve a corresponding method flow or corresponding function. The processor described in this embodiment of the present invention can be used in the operation of a method for characterizing the transverse structure of a strike-slip fault zone.

[0108] In another embodiment of the present invention, a storage medium is provided, specifically a computer-readable storage medium (Memory), which is a memory device in a computer device used to store programs and data. It is understood that the computer-readable storage medium here can include both the built-in storage medium in the computer device and extended storage media supported by the computer device. The computer-readable storage medium provides storage space that stores the operating system of the terminal. Furthermore, the storage space also stores one or more instructions suitable for loading and execution by a processor, which can be one or more computer programs (including program code). It should be noted that the computer-readable storage medium here can be high-speed RAM or non-volatile memory, such as at least one disk storage device. The processor can load and execute one or more instructions stored in the computer-readable storage medium to implement the corresponding steps of the method for characterizing the transverse structure of a strike-slip fault zone in the above embodiments.

[0109] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied 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.

[0110] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0111] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0112] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for characterizing the transverse structure of a strike-slip fault zone, characterized in that, Includes the following steps: Acquire fault zone data and establish a geological model of the transverse structure of the strike-slip fault zone; Geophysical properties were applied to characterize the strike-slip fault zone in the geological model of the lateral structure of the strike-slip fault zone, and the characterization results were obtained. Based on the characterization results, a three-dimensional spatial model of the strike-slip fault zone was created, and the transverse structure of the strike-slip fault zone was characterized.

2. The method for characterizing the transverse structure of a strike-slip fault zone according to claim 1, characterized in that, The process of acquiring fault zone data and establishing a geological model of the lateral structure of the strike-slip fault zone is as follows: Based on wellbore data and the development characteristics of different lateral parts of the strike-slip fault zone, a geological model of the lateral structure of the strike-slip fault zone is established. The wellbore data includes field outcrop observations of the strike-slip fault and well logging data. The geological model of the transverse structure of the strike-slip fault zone includes reservoir characteristics, fluid characteristics, connectivity characteristics, and energy difference characteristics at different locations of the transverse fault zone.

3. The method for characterizing the transverse structure of a strike-slip fault zone according to claim 1, characterized in that, The strike-slip fault zone is divided into a fault core, a fault fracture zone and a fracture zone from the middle of the fault to both sides. The reservoir space type of the fault core is a cave and a fracture pore reservoir. The oil and gas filling of the fault core is from bottom to top. The oil and gas reservoir is connected through the fault plane and the fracture pore body. The reservoir space of the fracture zone is a fracture-cavity type and a cavity type reservoir. Oil and gas migrate laterally from the fracture core along the secondary fractures and fracture zones, and the fracture-cavity bodies are connected through fractures. The reservoir space in the fracture zone is a fracture-void type reservoir, with oil and gas transported along the fracture network and connected by fracture connectivity.

4. The method for characterizing the transverse structure of a strike-slip fault zone according to claim 1, characterized in that, The process of using geophysical properties to characterize the strike-slip fault zone in the geological model of the lateral structure of the strike-slip fault zone and obtaining the characterization results is as follows: Based on 3D seismic data, geophysical properties of strike-slip fault zones are extracted, and sensitive properties of different types of strike-slip fault zones are obtained based on the extracted geophysical properties. Based on the sensitive attributes of different types of strike-slip fault zones and drilling data, establish threshold values ​​for different types of sensitive attributes; Based on the threshold of sensitive attributes, the type of strike-slip fault zone is determined and characterized.

5. The method for characterizing the transverse structure of a strike-slip fault zone according to claim 4, characterized in that, The strike-slip fracture zone includes a fracture core, a fracture fragmentation zone, and a crack zone; The coherence-based ESP attribute is used to characterize the sensitive properties of the fracture core region; Structural tensor properties are used to characterize the sensitive properties of fracture zone regions; The automatic fault extraction (AFE) method was used to characterize the sensitive properties of the fracture zone region.

6. The method for characterizing the transverse structure of a strike-slip fault zone according to claim 4, characterized in that, Sensitive attribute judgment thresholds include: sensitive attribute thresholds for the fracture core region, sensitive attribute thresholds for the fracture break zone region, and sensitive attribute thresholds for the crack zone region; The sensitivity attribute threshold of the fracture core region is determined based on the values ​​of coherent attribute types at the venting and leakage points during the drilling process. The sensitivity attribute threshold of the fracture zone is determined based on the average value of the structural tensor attributes at the location of Class I and Class II reservoirs as interpreted by well logging. If there are multiple wells, it is determined based on the arithmetic mean of the multiple wells. The sensitivity attribute threshold for the fracture zone region is based on the attribute value of the Automatic Fault Extraction (AFE) method. If multiple wells exist, the threshold is determined based on the minimum value among the multiple wells.

7. The method for characterizing the transverse structure of a strike-slip fault zone according to claim 1, characterized in that, The process of performing three-dimensional spatial modeling of the strike-slip fault zone based on the characterization results, and completing the characterization of the transverse structure of the strike-slip fault zone, is as follows: The strike-slip fracture zone includes a fracture core, a fracture fragmentation zone, and a crack zone; By fusing fracture zones within fracture zones, a fracture zone-fracture zone fusion body is obtained. A fracture core is fused into the fracture zone-fracture zone fusion body to obtain a fracture zone-fracture zone-fracture core fusion body; Based on the fusion of fracture zone, fracture fracture zone and fracture core, a three-dimensional spatial model was constructed to complete the characterization of the transverse structure of the strike-slip fracture zone.

8. A system for characterizing the transverse structure of strike-slip fault zones, characterized in that, A method for characterizing the transverse structure of a strike-slip fault zone according to any one of claims 1-7 includes: The preprocessing unit is configured as follows: Used to acquire fault zone data and establish a geological model of the lateral structure of strike-slip fault zones; The characterization unit is configured as follows: Used to characterize strike-slip fault zones in geological models of the transverse structure of strike-slip fault zones by applying geophysical properties, and to obtain characterization results; The output unit is configured as follows: Based on the characterization results, it is used to perform three-dimensional spatial modeling of strike-slip fault zones and complete the characterization of the transverse structure of strike-slip fault zones.

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, it implements the steps of the method for characterizing the transverse structure of a strike-slip fault zone as described in any one of claims 1-7.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the method for characterizing the transverse structure of a strike-slip fault zone as described in any one of claims 1-7.

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