Method and device for determining strike-slip faults

Abstract

The application provides a method and device for determining strike-slip faults, which comprises the following steps: obtaining a seismic profile of a target area, wherein the seismic profile comprises multiple marker layers; determining whether the offsets of the multiple marker layers belong to the same fault if each marker layer has an offset; if yes, obtaining a first attribute parameter and a second attribute parameter of the fault, and determining whether the fault is a strike-slip fault according to the first attribute parameter and the second attribute parameter; wherein the first attribute parameter comprises the layer position offset angle of the offset points in the uppermost marker layer and the lowermost marker layer of the multiple marker layers, and the second attribute parameter comprises at least one of the following: the structural style of the fault, the fault throw of the offset points of each marker layer of the multiple marker layers, and the dip of the offset points of each marker layer of the multiple marker layers. The application can accurately determine the strike-slip characteristics of the fault in the seismic profile, support the determination of the strike-slip fault-controlled oil and gas favorable area, and improve the oil and gas exploration and development benefits.

Description

Technical Field

[0001] This invention relates to the field of fault determination technology, specifically to a method for determining strike-slip faults, a device for determining strike-slip faults, a terminal device, and a machine-readable storage medium. Background Technology

[0002] Among the three basic fault models—normal faults, reverse faults, and strike-slip faults—strike-slip faults are the most complex in deformation and the most difficult to identify. Due to their weak deformation and lack of regularity, strike-slip faults are often confused with normal and reverse faults. If the deformation characteristics of a fault cannot be accurately determined, the relationship between the fault and reservoir and hydrocarbon accumulation will remain unclear, making it difficult to identify favorable areas for the development of strike-slip fault-controlled hydrocarbon reservoirs.

[0003] Existing technologies typically use the planar properties of earthquakes (such as coherence and curvature) to characterize the distribution of faults, or use earthquake properties to extract fault profiles for fault identification. However, these methods can only characterize faults and cannot accurately identify strike-slip faults. Therefore, how to accurately determine the nature of faults through seismic profiles and find favorable oil and gas areas to obtain oil and gas exploration and development benefits is an urgent problem to be solved. Summary of the Invention

[0004] The purpose of this invention is to provide a method and apparatus for determining strike-slip faults. This method and apparatus are used to solve the problem that the inability to accurately determine the deformation properties of faults leads to an inability to clearly define the relationship between faults and reservoirs and hydrocarbon accumulation, making it difficult to determine favorable areas for the development of strike-slip fault-controlled hydrocarbon reservoirs.

[0005] To achieve the above objectives, embodiments of the present invention provide a method for determining strike-slip faults, comprising:

[0006] Obtain a seismic profile of the target area, the seismic profile including multiple marker layers;

[0007] If each marker layer has faults, determine whether the faults of multiple marker layers belong to the same fault.

[0008] If so, obtain the first and second attribute parameters of the fault, and determine whether the fault is a strike-slip fault based on the first and second attribute parameters of the fault.

[0009] The first attribute parameter includes the layer offset angle of the fault point in the uppermost and lowermost marker layers of the multi-layer marker layers, and the second attribute parameter includes at least one of the following: the fault structure, the fault displacement of the fault point in each marker layer of the multi-layer marker layers, and the tendency of the fault point in each marker layer of the multi-layer marker layers.

[0010] Optionally, the seismic profile is obtained based on seismic data of the target area.

[0011] Optionally, the second attribute parameter is the structural pattern of the fault; determining whether the fault is a strike-slip fault based on the first and second attribute parameters includes:

[0012] If the stratigraphic offset angle of the fault point in the uppermost and lowermost marker layers of a multi-layered fault is less than or equal to a preset offset angle, and the fault structure is a flower-like structure from the lowermost to the uppermost marker layer, then the fault is determined to be a strike-slip fault.

[0013] Optionally, the second attribute parameter is the fault displacement of the fault point in each of the multiple marker layers; determining whether the fault is a strike-slip fault based on the first and second attribute parameters of the fault includes:

[0014] If the stratigraphic offset angle of the fault point in the uppermost and lowermost multi-layer marker layers is less than or equal to a preset offset angle, and the difference in fault distance between the fault points in two adjacent marker layers is less than a preset difference, then the fault is determined to be a strike-slip fault.

[0015] Optionally, the second attribute parameter is the tendency of the fault point in each of the multiple marker layers; determining whether the fault is a strike-slip fault based on the first and second attribute parameters of the fault includes:

[0016] If the stratigraphic offset angle of the fault points in the uppermost and lowermost marker layers of the multi-layer marker layers is less than or equal to a preset offset angle, and the fault points in some marker layers of the multi-layer marker layers have opposite tendencies, then the fault is determined to be a strike-slip fault.

[0017] Optionally, the second attribute parameter is the dip direction and the fault displacement of each fault point in the multi-marker layer; determining whether the fault is a strike-slip fault based on the first and second attribute parameters of the fault includes:

[0018] If the layer offset angle of the fault point in the uppermost and lowermost marker layers of the multi-layer marker layers is less than or equal to the preset offset angle, and the fault points of each marker layer in the multi-layer marker layers have the same inclination, and the fault displacement of each marker layer above the target marker layer is greater than the fault displacement of each marker layer below the target marker layer, then the fault is determined to be a strike-slip fault.

[0019] Optionally, the method further includes: determining the target marker layer in a multi-layered marker system, specifically including:

[0020] Traverse from the topmost marker layer to the bottommost marker layer, and determine the marker layer that first satisfies the condition that the breakpoint distance is less than or equal to the breakpoint distance of each marker layer above it and greater than the breakpoint distance of each marker layer below it as the target marker layer.

[0021] A second aspect of the present invention provides an apparatus for determining strike-slip faults, comprising:

[0022] The acquisition module is used to acquire seismic profile maps of the target area, the seismic profile maps including multiple marker layers; and to acquire first attribute parameters and second attribute parameters of faults.

[0023] The first determining module is used to determine whether the faults of multiple marker layers belong to the same fault when there is a fault in each marker layer.

[0024] The second determining module is used to determine whether a fault is a strike-slip fault based on the first and second attribute parameters of the fault when it is determined that the faults of multiple marker layers belong to the same fault.

[0025] The first attribute parameter includes the layer offset angle of the fault point in the uppermost and lowermost marker layers of the multi-layer marker layers, and the second attribute parameter includes at least one of the following: the fault structure, the fault displacement of the fault point in each marker layer of the multi-layer marker layers, and the tendency of the fault point in each marker layer of the multi-layer marker layers.

[0026] A third aspect of the present invention provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the above-described method for determining strike-slip faults.

[0027] On the other hand, the present invention provides a machine-readable storage medium storing instructions for causing a machine to perform the strike-slip fault determination method described above.

[0028] This application first obtains multiple marker layers from seismic profiles and determines whether the faults of these marker layers belong to the same fault. After confirming that the faults belong to the same fault, it obtains the first and second attribute parameters of the fault and determines whether the fault is a strike-slip fault based on these parameters. This accurately determines the strike-slip characteristics of the fault in the seismic profile, clarifies the relationship between the fault and reservoir and hydrocarbon accumulation, supports the identification of favorable areas for strike-slip fault-controlled hydrocarbon development, helps to determine well location targets, and improves the efficiency of oil and gas exploration and development.

[0029] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0030] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0031] Figure 1 This is a flowchart illustrating the method for determining strike-slip faults provided by the present invention;

[0032] Figure 2 This is an overall flowchart of the method for determining strike-slip faults provided by the present invention;

[0033] Figure 3 This is a schematic diagram of the first type of strike-slip fault provided by the present invention;

[0034] Figure 4 This is a schematic diagram of the second type of strike-slip fault provided by the present invention;

[0035] Figure 5 This is a schematic diagram of the third type of strike-slip fault provided by the present invention;

[0036] Figure 6 This is a schematic diagram of the fourth type of strike-slip fault provided by the present invention;

[0037] Figure 7 This is a schematic diagram of the structure of the strike-slip fault determination device provided by the present invention.

[0038] Explanation of reference numerals in the attached figures

[0039] 10 - Acquisition module; 20 - First determination module; 30 - Second determination module. Detailed Implementation

[0040] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0041] In the embodiments of the present invention, unless otherwise stated, directional terms such as "up," "down," "left," and "right" generally refer to the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use.

[0042] The terms “first,” “second,” “third,” etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0043] Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] Figure 1This is a flowchart illustrating the method for determining strike-slip faults provided by the present invention; Figure 2 This is an overall flowchart of the method for determining strike-slip faults provided by the present invention; Figure 3 This is a schematic diagram of the first type of strike-slip fault provided by the present invention; Figure 4 This is a schematic diagram of the second type of strike-slip fault provided by the present invention; Figure 5 This is a schematic diagram of the third type of strike-slip fault provided by the present invention; Figure 6 This is a schematic diagram of the fourth type of strike-slip fault provided by the present invention. (See diagram below.) Figure 1-2 As shown, this embodiment provides a method for determining strike-slip faults, including:

[0045] Step 101: Obtain a seismic profile of the target area, wherein the seismic profile includes multiple marker layers;

[0046] Step 102: If each marker layer has faults, determine whether the faults of multiple marker layers belong to the same fault.

[0047] Step 103: If yes, obtain the first attribute parameter and the second attribute parameter of the fault, and determine whether the fault is a strike-slip fault based on the first attribute parameter and the second attribute parameter of the fault.

[0048] The first attribute parameter includes the layer offset angle of the fault point in the uppermost and lowermost marker layers of the multi-layer marker layers, and the second attribute parameter includes at least one of the following: the fault structure, the fault displacement of the fault point in each marker layer of the multi-layer marker layers, and the tendency of the fault point in each marker layer of the multi-layer marker layers.

[0049] Specifically, firstly, seismic and well logging data of the target area are acquired to obtain a seismic profile of the target area. This seismic profile contains multiple marker layers. Determining these marker layers involves: analyzing the well logging data to determine the depth of the marker layers above the wellbore; then, matching the synthesized well logging data with the seismic data to determine the position of the marker layers above the wellbore on the seismic surface; finally, comparing and tracing the seismic data to determine the layer position of the marker layers in the seismic profile. After acquiring the multiple marker layers, if each marker layer exhibits faulting (if a marker layer exhibits faulting, then the fault has a fault point), and it is determined whether the faults of the multiple marker layers belong to the same fault, then the first and second attribute parameters of the fault are acquired. Based on these parameters, it is determined whether the fault is a strike-slip fault. The first attribute parameter includes the layer offset angle of the fault point in the uppermost and lowermost marker layers of the multiple marker layers. The second attribute parameter includes at least one of the following: the structural style of the fault, the fault displacement of the fault point in each marker layer of the multiple marker layers, and the dip direction of the fault point in each marker layer of the multiple marker layers.

[0050] In addition, determining whether the faults of multiple marker layers belong to the same fault includes: if the faults of multiple marker layers are continuous in the vertical direction, then the faults are determined to belong to the same fault.

[0051] Furthermore, the seismic profile is obtained based on seismic data of the target area.

[0052] Further, the second attribute parameter is the structural pattern of the fault; determining whether the fault is a strike-slip fault based on the first and second attribute parameters of the fault includes:

[0053] If the stratigraphic offset angle of the fault point in the uppermost and lowermost marker layers of a multi-layered fault is less than or equal to a preset offset angle, and the fault structure is a flower-like structure from the lowermost to the uppermost marker layer, then the fault is determined to be a strike-slip fault.

[0054] Specifically, after determining that the faults of multiple marker layers belong to the same fault, the stratigraphic offset angles of the fault points in the uppermost and lowermost marker layers are obtained. If the stratigraphic offset angles of the fault points in the uppermost and lowermost marker layers are less than or equal to a preset offset angle, and the fault structure is a flower-like structure from the lowermost to the uppermost marker layer, then the fault is determined to be a strike-slip fault. Where the stratigraphic offset angles of the fault points in the uppermost and lowermost marker layers are less than or equal to the preset offset angle, it indicates that the fault is vertical and steep. Figure 3 As shown in the schematic diagram of the first type of strike-slip fault provided in this embodiment, taking the presence of 4 marker layers as an example, the marker layers are named sequentially from the topmost and bottommost marker layers as: the first marker layer, the second marker layer, the third marker layer, and the fourth marker layer. Taking the fault point of the topmost marker layer as the reference point, the vertical offset angle of the fault point in the bottommost marker layer relative to the fault point of the topmost marker layer is less than a preset offset angle, which is usually set to 30 degrees. The fault structure pattern is that the bottommost marker layer forms a flower-like structure from the topmost marker layer. This can be understood as follows: there is only one fault point on the bottommost marker layer, and the fault points in the upper marker layers become multiple and scattered, forming a flower-like structure from the bottommost marker layer to the topmost marker layer. The number of fault points from the bottommost marker layer to the topmost marker layer gradually increases, forming a growth trend. The number of fault points from the bottommost marker layer to the topmost marker layer can also increase to a certain number and then remain at that number.

[0055] Faults forming flower-like structures can exhibit tensional-shear or compressional-shear properties. Based on this, flower-like structures can be classified into two types: positive flower-like structures and negative flower-like structures. Positive flower-like structures: These structures are derived from convergent strike-slip faults and form under compressive-torsional stress. A steep strike-slip fault branches upwards, creating an anti-thrust structure composed of reverse faults. The faults are steep at the bottom and gentle at the top, with the convex surface facing upwards. The cut strata are mostly back-shaped, but they do not exhibit bend-slip or folding properties. Negative flower-like structures: These structures are derived from divergent strike-slip faults and form under tensional-torsional stress. A set of concave-facing normal faults constitutes a graben-like structure. The strata within the graben are gentle, with the shallower parts forming synclines slightly disrupted by the normal faults. These synclines also do not exhibit bend-slip or folding properties.

[0056] Further, the second attribute parameter is the fault displacement of the fault point in each of the multi-layered marker layers; the step of determining whether the fault is a strike-slip fault based on the first and second attribute parameters of the fault includes:

[0057] If the stratigraphic offset angle of the fault point in the uppermost and lowermost multi-layer marker layers is less than or equal to a preset offset angle, and the difference in fault distance between the fault points in two adjacent marker layers is less than a preset difference, then the fault is determined to be a strike-slip fault.

[0058] Specifically, after determining that the faults in multiple marker layers belong to the same fault, the stratigraphic offset angles of the fault points in the uppermost and lowermost marker layers are obtained. If the stratigraphic offset angles of the fault points in the uppermost and lowermost marker layers are less than or equal to a preset offset angle, and the difference in fault displacement between two adjacent marker layers in the multiple marker layers is less than a preset difference, then the fault is determined to be a strike-slip fault. Wherein, if... Figure 4 As shown in the schematic diagram of the first type of strike-slip fault provided in this embodiment, taking the existence of 3 marker layers as an example, the uppermost marker layer and the lowermost marker layer are named sequentially as: the first marker layer, the second marker layer and the third marker layer. If the difference in the fault distance of the fault points of the first marker layer and the second marker layer is less than a preset difference, and the difference in the fault distance of the fault points of the second marker layer and the third marker layer is less than a preset difference, then the fault can be determined to be a strike-slip fault.

[0059] In another implementation, the difference in fault distance between the fault points of two adjacent fault layers in the multi-layered marker layers being less than a preset difference can be replaced by the difference in fault distance between the fault points of each fault layer in the multi-layered marker layers being less than a preset difference. This can also achieve the determination of a strike-slip fault. For example, if there are 3 marker layers, the top and bottom marker layers are named sequentially as: the first marker layer, the second marker layer, and the third marker layer. If the difference in fault distance between the fault points of the first, second, and third marker layers is less than the preset difference, then the fault can be determined to be a strike-slip fault.

[0060] Further, the second attribute parameter is the tendency of the fault point in each of the multi-layered marker layers; the step of determining whether the fault is a strike-slip fault based on the first and second attribute parameters of the fault includes:

[0061] If the stratigraphic offset angle of the fault points in the uppermost and lowermost marker layers of the multi-layer marker layers is less than or equal to a preset offset angle, and the fault points in some marker layers of the multi-layer marker layers have opposite tendencies, then the fault is determined to be a strike-slip fault.

[0062] Specifically, after determining that the faults in multiple marker layers belong to the same fault, the stratigraphic offset angles of the fault points in the uppermost and lowermost marker layers are obtained. If the stratigraphic offset angles of the fault points in the uppermost and lowermost marker layers are less than or equal to a preset offset angle, and the fault points in some marker layers have opposite dips, then the fault is determined to be a strike-slip fault. Figure 5 As shown in the schematic diagram of the first type of strike-slip fault provided in this embodiment, taking the existence of 4 marker layers as an example, the marker layers from the topmost and bottommost are named as follows: first marker layer, second marker layer, third marker layer and fourth marker layer. Among them, the fault points of the first marker layer, the second marker layer and the third marker layer are all lower on the left and higher on the right, while the fourth marker layer is higher on the left and lower on the right. Therefore, the fault points of some marker layers in the multi-layer marker layers have opposite tendencies, and there is a reversal of tendencies. Thus, the fault can be determined to be a strike-slip fault.

[0063] In another embodiment, taking the existence of 4 marker layers as an example, the marker layers from the top and bottom are named sequentially as: first marker layer, second marker layer, third marker layer, and fourth marker layer. The fault points of the first, second, and third marker layers are all left-high and right-low, while the fourth marker layer is left-low and right-high. Therefore, the fault points of some marker layers in the multi-layered system have opposite tendencies, indicating a reversal of tendencies. This also confirms that the fault is a strike-slip fault.

[0064] In another embodiment, taking the existence of 4 marker layers as an example, the marker layers from the top and bottom are named sequentially as: first marker layer, second marker layer, third marker layer, and fourth marker layer. The fault points of the first and second marker layers are both left-high and right-low, while the third and fourth marker layers are left-low and right-high. Therefore, the fault points of some marker layers in the multi-layered system have opposite tendencies, indicating a reversal of tendencies. This also confirms that the fault is a strike-slip fault.

[0065] Further, the second attribute parameter is the dip direction and the fault displacement of each fault point in the multi-layered marker layers; determining whether the fault is a strike-slip fault based on the first and second attribute parameters of the fault includes:

[0066] If the layer offset angle of the discontinuity point in the uppermost and lowermost marker layers of the multi-layer marker system is less than or equal to the preset offset angle; and

[0067] If the fault points of each marker layer in a multi-layered fault system have the same orientation and the fault displacement of each marker layer above the target marker layer is greater than the fault displacement of each marker layer below the target marker layer, then the fault is determined to be a strike-slip fault.

[0068] Specifically, after determining that the faults in multiple marker layers belong to the same fault, the stratigraphic offset angles of the fault points in the uppermost and lowermost marker layers are obtained. If the stratigraphic offset angles of the fault points in the uppermost and lowermost marker layers are less than or equal to a preset offset angle, and the fault points in each marker layer in the multiple marker layers have the same dip, and the fault displacement of the fault point in each marker layer above the target marker layer is greater than the fault displacement of the fault point in each marker layer below the target marker layer, then the fault is determined to be a strike-slip fault. Wherein, if... Figure 6 As shown in the schematic diagram of the first type of strike-slip fault provided in this embodiment, taking the existence of four marker layers as an example, the marker layers are named sequentially from the top to the bottom as: first marker layer, second marker layer, third marker layer, and fourth marker layer. All four marker layers have the same dip direction, with the left side higher than the right side. Furthermore, the displacement of the fault point in the first marker layer is equal to the displacement of the fault point in the second marker layer, the displacements of the first and second marker layers are greater than the displacement of the fault point in the third marker layer, and the displacement of the fault point in the third marker layer is greater than the displacement of the fault point in the fourth marker layer. The distribution pattern of the displacements in the multiple marker layers is larger at the top and smaller at the bottom. The second marker layer can be designated as the target marker layer, such that the displacement of the fault point in the first marker layer above the second marker layer is greater than or equal to the displacement of the fault point in the second marker layer, and the displacements of the fault points in the third and fourth marker layers below the second marker layer are smaller than the displacement of the fault point in the second marker layer.

[0069] Furthermore, the method further includes: determining the target marker layer in a multi-layered marker system, specifically including:

[0070] Traverse from the topmost marker layer to the bottommost marker layer, and determine the marker layer that first satisfies the condition that the breakpoint distance is less than or equal to the breakpoint distance of each marker layer above it and greater than the breakpoint distance of each marker layer below it as the target marker layer.

[0071] Specifically, taking a four-layer flag layer as an example, the top and bottom flag layers are named sequentially as: first flag layer, second flag layer, third flag layer, and fourth flag layer. All four flag layers have the same tendency, with the left side higher than the right. Furthermore, the breakpoint distance of the first flag layer is 12.5ms, the second flag layer is 11.5ms, the third flag layer is 9.5ms, and the fourth flag layer is 8ms. Then, traversing from the top flag layer (first flag layer) to the bottom flag layer (fourth flag layer), the flag layer that first satisfies the condition that its breakpoint distance (11.5ms) is less than or equal to the breakpoint distance (12.5ms) of each flag layer above it and greater than the breakpoint distances (9.5ms and 8ms) of each flag layer below it is determined as the target flag layer, i.e., the second flag layer.

[0072] In another implementation, specifically, taking a four-layer flag layer as an example, the top and bottom flag layers are named sequentially as: first flag layer, second flag layer, third flag layer, and fourth flag layer. All four flag layers have the same tendency, with the left side higher than the right. Furthermore, the breakpoint distance of the first flag layer is 12.5ms, the second flag layer is 12.5ms, the third flag layer is 9.5ms, and the fourth flag layer is 9.5ms. Then, traversing from the top flag layer (i.e., the first flag layer) to the bottom flag layer (the fourth flag layer), the flag layer that first satisfies the condition that its breakpoint distance (12.5ms) is less than or equal to the breakpoint distance (12.5ms) of each flag layer above it and greater than the breakpoint distance (9.5ms and 9.5ms) of each flag layer below it is determined as the target flag layer, i.e., the second flag layer. Here, ms stands for millisecond, which represents the vertical depth unit of time-domain seismic data.

[0073] Figure 7 This is a schematic diagram of the structure of the strike-slip fault determination device provided by the present invention, as shown below. Figure 7 As shown, a second aspect of the present invention provides an apparatus for determining strike-slip faults, comprising:

[0074] The acquisition module 10 is used to acquire a seismic profile of the target area, the seismic profile including multiple marker layers; and to acquire first attribute parameters and second attribute parameters of the fault.

[0075] The first determining module 20 is used to determine whether the faults of multiple marker layers belong to the same fault when there is a fault in each marker layer.

[0076] The second determining module 30 is used to determine whether the fault is a strike-slip fault based on the first attribute parameter and the second attribute parameter of the fault when it is determined that the faults of the multiple marker layers belong to the same fault.

[0077] The first attribute parameter includes the stratigraphic offset angle of the fault points in the uppermost and lowermost marker layers of the multi-layer marker layers, and the second attribute parameter includes at least one of the following: the fault structure, the fault displacement of the fault points in each marker layer of the multi-layer marker layers, and the fault tendency of the fault points in each marker layer of the multi-layer marker layers.

[0078] A third aspect of the present invention provides a terminal device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the above-described method for determining strike-slip faults.

[0079] A fourth aspect of the present invention provides a machine-readable storage medium storing instructions for causing a machine to perform the strike-slip fault determination method described above.

[0080] The optional embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the scope of the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all fall within the protection scope of the embodiments of the present invention.

[0081] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not describe the various possible combinations separately.

[0082] Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. This program is stored in a storage medium and includes several instructions to cause a microcontroller, chip, or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0083] Furthermore, various different implementations of the present invention can be combined arbitrarily, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed in the present invention.

Claims

1. A method for determining strike-slip faults, characterized in that, include: Obtain a seismic profile of the target area, the seismic profile including multiple marker layers; If each marker layer has faults, determine whether the faults of multiple marker layers belong to the same fault. If so, obtain the first and second attribute parameters of the fault, and determine whether the fault is a strike-slip fault based on the first and second attribute parameters of the fault. The first attribute parameter includes the layer offset angle of the discontinuity points in the uppermost and lowermost marker layers of the multi-layer marker layers; the second attribute parameter is one of the following: Fault structural patterns; The discontinuity of the fault point in each of the multi-layered markers; The tendency of discontinuity points in each of the multi-layered markers; The tendency of the discontinuity point of each marker layer in the multi-layer marker layer and the discontinuity of the discontinuity point of each marker layer in the multi-layer marker layer.

2. The method according to claim 1, characterized in that, The seismic profile is obtained based on seismic data from the target area.

3. The method according to claim 1, characterized in that, The second attribute parameter is the fault's structural pattern; Determining whether a fault is a strike-slip fault based on its first and second attribute parameters includes: If the stratigraphic offset angle of the fault point in the uppermost and lowermost marker layers of a multi-layered fault is less than or equal to a preset offset angle, and the fault structure is a flower-like structure from the lowermost to the uppermost marker layer, then the fault is determined to be a strike-slip fault.

4. The method according to claim 1, characterized in that, The second attribute parameter is the break distance of the break point in each of the multi-layered marker layers; Determining whether a fault is a strike-slip fault based on its first and second attribute parameters includes: If the stratigraphic offset angle of the fault point in the uppermost and lowermost multi-layer marker layers is less than or equal to a preset offset angle, and the difference in fault distance between the fault points in two adjacent marker layers is less than a preset difference, then the fault is determined to be a strike-slip fault.

5. The method according to claim 1, characterized in that, The second attribute parameter is the tendency of the breakpoints in each of the multi-layered marker layers; Determining whether a fault is a strike-slip fault based on its first and second attribute parameters includes: If the stratigraphic offset angle of the fault points in the uppermost and lowermost marker layers of the multi-layer marker layers is less than or equal to a preset offset angle, and the fault points in some marker layers of the multi-layer marker layers have opposite tendencies, then the fault is determined to be a strike-slip fault.

6. The method according to claim 1, characterized in that, The second attribute parameter is the tendency of the fault point in each of the multi-layered flag layers and the fault distance of the fault point in each of the multi-layered flag layers; Determining whether a fault is a strike-slip fault based on its first and second attribute parameters includes: If the layer offset angle of the fault points in the uppermost and lowermost marker layers of the multi-layer marker layers is less than or equal to the preset offset angle, the fault points in each marker layer of the multi-layer marker layers have the same tendency, and the fault displacement of the fault point in each marker layer above the target marker layer is greater than the fault displacement of the fault point in each marker layer below the target marker layer, then the fault is determined to be a strike-slip fault.

7. The method according to claim 6, characterized in that, The method further includes: determining the target marker layer in a multi-layered marker system, specifically including: Traverse from the topmost marker layer to the bottommost marker layer, and determine the marker layer that first satisfies the condition that the breakpoint distance is less than or equal to the breakpoint distance of each marker layer above it and greater than the breakpoint distance of each marker layer below it as the target marker layer.

8. A device for determining strike-slip faults, characterized in that, include: The acquisition module is used to acquire seismic profile maps of the target area, wherein the seismic profile maps include multiple marker layers; And the first and second attribute parameters used to obtain the fault; The first determining module is used to determine whether the faults of multiple marker layers belong to the same fault when there is a fault in each marker layer. The second determining module is used to determine whether a fault is a strike-slip fault based on the first and second attribute parameters of the fault when it is determined that the faults of multiple marker layers belong to the same fault. The first attribute parameter includes the layer offset angle of the discontinuity points in the uppermost and lowermost marker layers of the multi-layer marker layers; the second attribute parameter is one of the following: Fault structural patterns; The discontinuity of the fault point in each of the multi-layered markers; The tendency of discontinuity points in each of the multi-layered markers; The tendency of the discontinuity point of each marker layer in the multi-layer marker layer and the discontinuity of the discontinuity point of each marker layer in the multi-layer marker layer.

9. A terminal 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 determining strike-slip faults as described in any one of claims 1-7.

10. A machine-readable storage medium storing instructions for causing a machine to perform the method for determining a strike-slip fault as described in any one of claims 1-7 of this application.

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