A method and system for multi-area planar fusion of large strike-slip faults

Abstract

This invention discloses a planar fusion method for large strike-slip faults across multiple work zones, comprising: acquiring coherent body boundary data and coherent body data corresponding to different work zones within the current fault, wherein the coherent body data includes the location and morphological information of the coherent bodies within the corresponding work zone; storing the coherent body data of each work zone as a first-type data body in a first format, and storing the coherent body boundary data of each work zone as a second-type data body in a second format; integrating and contour-drawing the two types of data bodies for each work zone based on the first-type and second-type data bodies, forming initial coherent bodies containing fault zone characteristic information for each work zone, and further forming corresponding independent coherent body models; and performing work zone overlay processing on the independent coherent body models corresponding to each work zone to form a fusion model used to display the complete planar features of the strike-slip fault. This invention can accurately display the complete planar features of large strike-slip faults.

Description

Technical Field

[0001] This invention relates to the field of seismic data display technology, and in particular to a method and system for multi-zone planar fusion of large strike-slip faults. Background Technology

[0002] The Shunbei No. 5 strike-slip fault (hereinafter referred to as "Shunbei No. 5 fault") in the Tarim Basin is a fault zone that runs through the Tabei Uplift, Shuntogole Low Uplift and Tazhong Uplift, with a fault extension length of 270 km. According to the research on the oil and gas exploration results of the Tarim Basin over many years, the strike-slip fault zone in the Aman area of ​​the Tarim Basin has obvious segmentation characteristics. Oil and gas are mainly distributed along the fault zone, with 75% of the oil and gas distributed on the fault zone, while the oil and gas indication is poor in areas far away from the fault zone.

[0003] Seismic body coherence technology is considered one of the major breakthroughs in petroleum geophysical exploration in recent decades. It provides an effective tool for the detailed interpretation of seismic data and is mainly applied to the interpretation of geological structures and sedimentary environments, as well as the exploration and development of concealed oil and gas reservoirs. In developing this invention, the inventors discovered at least the following problems in the existing technology: In previous industrial production and scientific research, coherence slices formed from different work areas, with different acquisition parameters, and using different preparation methods, when displayed in the same color gamut, exhibit significant differences in coherence values. This results in some work areas appearing clear while others appear blurry, limiting the overall understanding of fault zones and the planar characteristics of coherence bodies.

[0004] Therefore, existing technologies need to develop a platform that can accurately display the complete planar features of large strike-slip fractures when coherent slices from different work areas are displayed in the same color gamut, resulting in significant differences in coherence values. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a planar fusion method for multiple work zones in large strike-slip faults, comprising: acquiring coherent body boundary data and coherent body data corresponding to different work zones within the current fault, wherein the coherent body data includes the location and morphological information of the coherent bodies within the corresponding work zone; storing the coherent body data of each work zone as a first type of data body in a first format, and storing the coherent body boundary data of each work zone as a second type of data body in a second format; integrating and contour-drawing the two types of data bodies for each work zone based on the first type of data body and the second type of data body, forming initial coherent bodies containing fault zone feature information for each work zone, and further forming corresponding independent coherent body models; and performing work zone overlay processing on the independent coherent body models corresponding to each work zone to form a fusion model used to display the complete strike-slip fault features.

[0006] Preferably, before storing the coherent volume boundary data of each work area as a second type of data body in a second format, the method further includes: performing bounding box closure processing on the coherent volume boundary data of each work area.

[0007] Preferably, based on two types of data volumes in the same work area, contour lines are drawn using the minimum tension method to form the initial coherence volume for the current work area.

[0008] Preferably, the initial coherence volume of the current work area is sequentially processed by deleting contour lines and primary colors to form the independent coherence volume model.

[0009] Preferably, the step of storing the coherent volume data of each work area as a first type of data body in a first format includes: loading the coherent volume data corresponding to the current work area into the UE software; performing data preprocessing using the UE software; inserting an English comma after each column of data in the position and morphology information of the preprocessed coherent volume data, thereby converting the coherent volume data of the current work area into a first type of data body in the first format.

[0010] Preferably, the data preprocessing step using UE software includes: deleting invalid data from the coherent volume data.

[0011] Preferably, the step of performing work area overlay processing on the independent coherent body models corresponding to each work area to form a fusion model used to display the complete strike-slip fault features includes: performing work area overlay processing on the independent coherent body models corresponding to each work area according to the location coordinate information, and independently adjusting the colors of the different independent coherent body models to form the fusion model with a unified color tone.

[0012] Preferably, the first format is xyz format and the second format is dfd format.

[0013] Preferably, the step of acquiring coherent body boundary data and coherent body data corresponding to different work areas within the current fault includes: acquiring coherent body boundary data and coherent body data with an initial format corresponding to different work areas, wherein the initial format is dat format.

[0014] On the other hand, the present invention also provides a multi-sectoral planar fusion system for large strike-slip faults, comprising: a basic data acquisition module configured to acquire coherent body boundary data and coherent body data corresponding to different sectors within the current fault, wherein the coherent body data includes the position and morphological information of the coherent bodies within the corresponding sector; a basic data format conversion module configured to store the coherent body data of each sector as a first type of data body in a first format, and to store the coherent body boundary data of each sector as a second type of data body in a second format; an independent coherent body generation module configured to integrate and contour-draw the two types of data bodies of each sector based on the first type of data body and the second type of data body, thereby forming initial coherent bodies containing fault zone feature information for each sector, and further forming corresponding independent coherent body models; and a fusion model generation module configured to perform sector overlay processing on the independent coherent body models corresponding to each sector to form a fusion model used to display the complete strike-slip fault features.

[0015] Compared with the prior art, one or more embodiments of the above solutions may have the following advantages or beneficial effects:

[0016] This invention discloses a planar fusion method and system for large-scale strike-slip faults across multiple work areas. The method and system sequentially process 3D seismic parameters and coherence volumes from different work areas, performing color unification and overlaying of overlapping areas to form a fusion model that comprehensively displays the planar features of large-scale strike-slip faults. The fusion model generated in this embodiment utilizes techniques for characterizing and analyzing ultra-deep complex strike-slip faults in basins, fusing and displaying 3D seismic data from multiple work areas based on different parameters. This not only solves the problems of only seeing localized parts of the strike-slip fault across multiple work areas and the inconsistency in displayed fault features due to inconsistent coherence parameters between different work areas, but also determines the boundaries and main sections of the complete strike-slip fault zone. This allows for the study of the planar and geometric features of large-scale strike-slip fault zones at different times and strata, as well as the study of the tectonic evolution and degree of fault development, guiding the selection of exploration and development well locations and the optimization of well trajectory design.

[0017] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a step diagram of the planar fusion method for multiple work zones of large strike-slip faults according to an embodiment of this application.

[0020] Figure 2 This is a flowchart illustrating the planar fusion method for large strike-slip faults across multiple work zones, as described in this application.

[0021] Figure 3 This is a schematic diagram of the processing interface for an example of contour line delineation in the planar fusion method for large strike-slip faults in this application.

[0022] Figure 4 This is a comparison diagram showing the effect before and after the generation of an independent coherent body model in the planar fusion method for large strike-slip faults in this application embodiment.

[0023] Figure 5 This is a comparison diagram of the effects before and after the generation of the fusion model in the planar fusion method for large strike-slip faults in this application embodiment.

[0024] Figure 6 This is a block diagram of a multi-zone planar fusion system for large strike-slip faults according to an embodiment of this application. Detailed Implementation

[0025] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and examples, so that the process of how the present invention uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. It should be noted that, as long as there is no conflict, the various embodiments and features in the various embodiments of the present invention can be combined with each other, and the resulting technical solutions are all within the protection scope of the present invention.

[0026] Furthermore, the steps illustrated in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Also, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than that shown here.

[0027] The Shunbei No. 5 strike-slip fault (hereinafter referred to as "Shunbei No. 5 fault") in the Tarim Basin is a fault zone that runs through the Tabei Uplift, Shuntogole Low Uplift and Tazhong Uplift, with a fault extension length of 270 km. According to the research on the oil and gas exploration results of the Tarim Basin over many years, the strike-slip fault zone in the Aman area of ​​the Tarim Basin has obvious segmentation characteristics. Oil and gas are mainly distributed along the fault zone, with 75% of the oil and gas distributed on the fault zone, while the oil and gas indication is poor in areas far away from the fault zone.

[0028] Seismic body coherence technology is considered one of the major breakthroughs in petroleum geophysical exploration in recent decades. It provides an effective tool for the detailed interpretation of seismic data and is mainly applied to the interpretation of geological structures and sedimentary environments, as well as the exploration and development of concealed oil and gas reservoirs. In developing this invention, the inventors discovered at least the following problems in the existing technology: In previous industrial production and scientific research, coherence slices formed from different work areas, with different acquisition parameters, and using different preparation methods, when displayed in the same color gamut, exhibit significant differences in coherence values. This results in some work areas appearing clear while others appear blurry, limiting the overall understanding of fault zones and the planar characteristics of coherence bodies.

[0029] Therefore, to address the problems of existing technologies, this invention proposes a planar fusion method and system for large strike-slip faults across multiple work zones. This method and system unifies the colors of 3D seismic parameters and coherence volumes from different work zones and covers the corresponding overlapping areas, thus fully displaying the planar features of large-scale strike-slip faults. Therefore, this invention solves the problems of multi-work zone planar features only showing local features of the strike-slip fault within the corresponding work zone, and the inconsistency in display features caused by inconsistent coherence parameters between different work zones.

[0030] Figure 1 This is a step diagram of the planar fusion method for multiple work zones of large strike-slip faults according to an embodiment of this application. Figure 2 This is a detailed flowchart of the planar fusion method for large strike-slip faults across multiple work zones, according to an embodiment of this application. The following is in conjunction with... Figure 1 and Figure 2 The implementation process of the multi-area planar fusion method for large strike-slip faults (hereinafter referred to as the "fusion method") described in this invention is explained. It should be noted that the fusion method described in this invention is applied to ultra-deep complex fault scenarios and is a multi-area fault feature fusion method involving ultra-deep large strike-slip faults. Specifically, this invention does not impose a specific limitation on the size of the strike-slip fault, as long as the large strike-slip fault involves at least two work areas. Furthermore, the multiple work areas mentioned in the embodiments of this invention refer to multiple work areas involved in the same large strike-slip fault.

[0031] like Figure 1As shown, step S110 acquires the coherence boundary data and coherence data corresponding to different work areas within the current fault. In step S110, it is necessary to acquire the 3D seismic feature data of all work areas included within the same large strike-slip fault. The 3D seismic feature data corresponding to these work areas are stored in the Landmark software. Therefore, when obtaining the coherence boundary data and coherence data corresponding to these work areas, it is necessary to export the coherence boundary data and coherence data corresponding to each work area from the Landmark sesmic or DSG workstation. It should be noted that in practical applications, 3D seismic feature data is often constructed on a work area basis. Thus, for large faults spanning multiple work areas, it is impossible to intuitively observe the seismic features of the complete strike-slip fault using the seismic data of a single work area. Therefore, step S110 needs to acquire the corresponding (for the current work area) coherence boundary data and (for the current work area) coherence data for each work area involved in the current large fault.

[0032] Furthermore, in the process of acquiring the coherent volume boundary data and coherent volume data corresponding to each work area, it is necessary to acquire coherent volume boundary data and coherent volume data with initial formats corresponding to different work areas. The initial format should be compatible with the landmark software, preferably in .dat format.

[0033] Furthermore, in obtaining coherent body boundary data for different work areas, based on the 3D seismic feature map of each work area, the boundaries of the coherent bodies are depicted to delineate the extent of each coherent body within the current work area, thus obtaining coherent body boundary data for the current work area. Further, when exporting the coherent body boundary data for each work area, the polygon tool is used on the workstation to depict the coherent body boundaries in the 3D seismic model corresponding to the current work area, delineating the boundary extent of all involved coherent bodies within that work area. Then, the drawn boundaries are exported from the workstation and saved as a data file with the .dat extension. In this way, coherent body boundary data with an initial format is obtained for each work area.

[0034] Furthermore, in obtaining coherent volume data for different work areas, it is necessary to export coherent volume data with an initial format for each work area from the workstation. The coherent volume data for each work area includes the position coordinates and morphological information of all coherent bodies within that work area. Specifically, when exporting the coherent volume data for each work area, the exported data from the workstation contains xyz values, and then the exported data is saved as .dat format data. In this way, coherent volume data with an initial format is obtained for each work area. It should be noted that the xyz values ​​represent the position coordinates and morphological information of all coherent bodies within each work area. The x and y values ​​represent the position coordinates of each coherent body within the current work area, and the z value represents the elevation difference of each coherent body within the current work area. Therefore, the xyz values ​​are used to represent the position and morphological range information of each coherent body.

[0035] Thus, after obtaining the coherent volume boundary data and coherent volume data corresponding to each work area within the current fault, the process proceeds to step S120. Step S120 stores the coherent volume data of each work area as a first type of data body in a first format, and stores the coherent volume boundary data of each work area as a second type of data body in a second format.

[0036] In step S120, the coherent volume data with an initial format obtained in step S110 is first converted into a first type of data volume with a first format, which facilitates the subsequent integration of coherent volume data and boundary data. Since the process of converting the coherent volume data corresponding to each work area into the first type of data volume is the same in actual application, this embodiment of the invention takes the format conversion process of one work area as an example, so that the coherent volume data with an initial format corresponding to each work area will be converted into the corresponding first type of data volume through the following process.

[0037] Specifically, the first step is to load the coherent volume data corresponding to the current work area into the UE software (i.e., Uedit32, a data editing processor for text or data). The second step is to use the UE software to preprocess the loaded coherent volume data. In a preferred embodiment, in the second step, invalid data in the loaded coherent volume data needs to be deleted using the UE software. Invalid data here includes: invalid prefix data, invalid suffix data, and other data that does not contain xyz values. The third step is to insert commas in English format after each column of data in the position and morphology information of the coherent volume data processed in the second step, thereby converting the coherent volume data of the current work area (with its initial format) into a first-type data volume with a first format. In the third step, it is first necessary to determine the position and shape information (x, y, z values) of the coherent volume data with the initial format of the deleted invalid data corresponding to the current work area; then, insert a comma (in English format) at the end of each column of data (including x, y, and z values) in the position and shape information to adjust the data format; finally, save the adjusted data as a first-type data volume with the first format suffix. The first format is xyz format.

[0038] In existing technologies, coherent volume data is typically converted directly into xyz format data volumes using dual-arc software. However, the xyz format data volumes generated by dual-arc software are too large, causing lag and making the conversion process difficult to execute. The inventors of this invention studied the data generation patterns of dual-arc software and replaced it with UE software to generate data volumes containing xyz values ​​in the same format. This significantly improves work efficiency by replacing the traditional process of generating data volumes first using dual-arc software and then generating graphics with UE software, which converts the data volume format directly for coherent imaging.

[0039] In step S120, the coherent volume boundary data of each work area obtained in step S110 with an initial format also needs to be converted into a second type of data body with a second format, so as to facilitate the subsequent integration of coherent volume data and boundary data. Since the process of converting the coherent volume boundary data corresponding to each work area into the second type of data body is the same in actual application, this embodiment of the invention takes the format conversion process of one work area as an example, so that the coherent volume boundary data with an initial format corresponding to each work area will be converted into the corresponding second type of data body through the following process.

[0040] Specifically, before performing the second type of data volume conversion, this embodiment of the invention first performs boundary box closure processing on the coherent volume boundary data of each work area. Then, the coherent volume boundary data for the current work area, after boundary box closure processing, is saved as a second type of data volume with a second format for subsequent contour line delineation. More specifically, the coherent volume boundary data for the current work area exported in step S110 is loaded into the dual-arc software, causing the boundary boxes to be closed. Finally, the processed data is saved as a data volume with a second data format suffix, i.e., a second type of data volume, for subsequent contour line delineation. The second format is DFD format.

[0041] After converting the coherent volume data and coherent volume boundary data of each work area into a first type of data body in a first format and a second type of data body in a second format that can be recognized by the DoubleFox software, the process proceeds to step S130.

[0042] Continue to refer to Figure 1 and Figure 2 Step S130 integrates the two types of data bodies corresponding to each work area and performs contour line delineation based on the first type of data body and the second type of data body obtained in step S120, and forms an initial coherent body containing the corresponding fault zone feature information for each work area, and further forms a corresponding independent coherent body model.

[0043] In step S130, the first type of data volume and the second type of data volume corresponding to the same work area are first imported into the contour drawing software to achieve integration processing. Then, contour drawing processing is performed on the model after the two types of data volumes of the current work area are combined to form the initial coherence volume (model) for the current work area. Figure 3 This is a schematic diagram of the processing interface for contour line delineation, an example of the planar fusion method for large strike-slip faults across multiple work areas, as described in this application. (Reference) Figure 3 In step S130, based on two types of data volumes in the same work area, contour lines are drawn using the minimum tension method to form an initial coherence volume for the current work area. Specifically, the minimum tension method is a process of performing interpolation on the XYZ data (location and morphology information of the coherence volume) to form a regional grid, and assigning different colors according to the grid to highlight the characteristics of the fault zone in the current work area.

[0044] Therefore, step S130 first obtains the corresponding initial coherence volume (with grid calculation implemented) for each work area. The initial coherence volume of each work area contains the prominent feature information of the local fault zone involved in the corresponding work area.

[0045] Next, after obtaining the initial coherence volume for each work area in step S130, it is necessary to construct a corresponding independent coherence volume model based on each initial coherence volume. Since the process of converting the initial coherence volume for each work area into an independent coherence volume model is the same in practical applications, this embodiment of the invention takes the model conversion process of one work area as an example, so that the initial coherence volume for each work area is converted into a corresponding independent coherence volume model through the following steps. Specifically, the initial coherence volume of the current work area is sequentially processed by deleting contour lines and primary colors, thereby forming an independent coherence volume model.

[0046] Figure 4 This is a comparison diagram showing the effect before and after the generation of an independent coherent body model in the planar fusion method for large strike-slip faults in this application embodiment. Figure 4 The left figure shows the initial coherence volume corresponding to a single work area after grid calculation. Figure 4 The right figure shows an independent coherent volume model corresponding to the same work area as the left figure, such as... Figure 4 As shown in the right figure, the characteristic information of the strike-slip fault zone in the work area is highlighted more clearly. In this embodiment of the invention, each independent coherent volume model can form a relatively independent region, and the tonal range within this region can be adjusted independently without affecting other regions.

[0047] After forming an independent coherent model for each work area, the process proceeds to step S140. Step S140 involves overlaying the independent coherent models for each work area to form a fused model that displays the complete strike-slip fault characteristics. Since step S130 yielded independent coherent models for each work area that only display the strike-slip fault characteristics of that specific work area, step S140 requires fusing the independent coherent models of all work areas involved in the same large strike-slip fault zone to form a fused coherent model that can display the complete strike-slip fault zone characteristics.

[0048] The overlapping zone is a complex tectonic phenomenon caused by the interference of stress fields at the tail ends of two or more strike-slip faults. Its planar geometric morphology and internal fracture patterns are controlled by factors such as the lithology of the developing strata, the arrangement of the strike-slip faults, and the intensity of strike-slip activity. In step S140, according to the location coordinate information, the independent coherent body models corresponding to each work area are overlapped, and the colors of the different independent coherent body models are adjusted independently to form a fused model with a unified color tone.

[0049] Specifically, step S140 first imports the independent coherent body models of different work areas into the Shuanghu software. Then, based on the position coordinates of all coherent bodies within each work area, the independent coherent body models of different work areas are overlaid according to their distribution location characteristics. Next, step S140 performs independent tonal range adjustment processing on the independent coherent body models corresponding to each work area in the location-integrated model, thereby obtaining a fused model with unified tonal values ​​for all work areas. In this way, the planar features of a large-scale strike-slip fault can be fully displayed using the current fused model.

[0050] Figure 5 This is a comparison diagram of the effects before and after the generation of the fusion model in the planar fusion method for large strike-slip faults in this application embodiment. Figure 5 The left figure shows the integrated model after only undergoing work area overlay processing on the multi-work area independent coherent body models. Figure 5 The right figure shows the fusion model corresponding to the same fault as the left figure, such as Figure 5 As shown, the right image more clearly highlights the characteristics of the complete strike-slip fault zone composed of multiple work areas, while the left image only shows local fault features and is blurry.

[0051] Example 1

[0052] The planar fusion method for large strike-slip faults in multiple work areas described in this invention was applied to the No. 5 strike-slip fault zone in the Shunbei area of ​​the Tarim Basin. The following describes the process of generating the fusion model for this strike-slip fault zone:

[0053] The Shunbei 5 strike-slip fault (hereinafter referred to as "Shunbei 5 fault") in the Tarim Basin is a fault zone that runs through the Tabei Uplift, Shuntogole Low Uplift, and Tazhong Uplift, with an extension length of 270 km. It is currently the longest known intracratonic strike-slip fault zone in the Shunbei and adjacent areas, extending all the way to Tazhong. It exhibits distinct segmentation in the plane, appearing as a discontinuous fault zone with widespread en echelon faults. However, due to the complex tectonic activity of the basin, the fault development is essentially multi-phase, resulting in a complex fault profile that is difficult to characterize. Furthermore, the Shunbei 5 fault is located at extremely deep subsurface levels, so geophysical methods, aided by coherence volumes, are necessary to enhance our understanding of the fault zone. However, only fused coherence volumes can comprehensively reflect the characteristics of the fault zone. Therefore, this invention presents a multi-area planar fusion processing and characterization of a large, ultra-deep strike-slip fault. Fusing a complete strike-slip fault zone is of great significance for studying the planar, geometric, and kinematic characteristics of the fault zone.

[0054] This invention takes the Shunbei No. 5 fault zone as the research background. It utilizes dual-arc software to process 3D seismic data and coherence data from different work areas. A fusion model clearly and completely displays the planar characteristics of large-scale strike-slip faults on a plane. This model can be used to study the planar and geometric characteristics of large-scale strike-slip fault zones at different times and strata, and also to study the tectonic evolution and fault development degree of the Shunbei No. 5 fault zone. In practice with the Shunbei No. 5 fault zone, it has achieved excellent results in identifying: planar characteristics such as en echelon faults, minor branch faults, and uplifts; strike; geometric characteristics; and kinematic characteristics. Figure 5 As shown in the right figure, on the well-defined T70 interface of the Shunbei No. 5 fault zone, it can be identified that the northern segment of the fault zone exhibits left-handed characteristics, the middle segment exhibits right-handed characteristics, while the southern segment shows characteristics of both left and right-handed development. Furthermore, it indicates tectonic stress backgrounds of different stresses and activity sequences. Additionally, it can be seen from... Figure 5 The pull-apart basins or compressional uplifts on the fault zone shown in the right figure can be used to determine whether the fault zone is diagonal to the left or right.

[0055] On the other hand, based on the above-mentioned planar fusion method for multiple work areas of large strike-slip faults, a planar fusion system for multiple work areas of large strike-slip faults (hereinafter referred to as the "fusion system") is also proposed. Figure 6 This is a block diagram of a multi-area planar fusion system for large strike-slip faults, according to an embodiment of this application. Figure 6 As shown, the fusion system of the present invention includes: a basic data acquisition module 61, a basic data format conversion module 62, an independent coherence volume generation module 63, and a fusion model generation module 64.

[0056] Furthermore, the basic data acquisition module 61 is implemented according to the method described in step S110 above, configured to acquire coherent body boundary data and coherent body data corresponding to different work areas within the current fault. The coherent body data for each work area includes the location and morphological information of the coherent bodies within that work area. The basic data format conversion module 62 is implemented according to the method described in step S120 above, configured to store the coherent body data of each work area as a first-type data body in a first format, and to store the coherent body boundary data of each work area as a second-type data body in a second format. The independent coherent body generation module 63 is implemented according to the method described in step S130 above, configured to integrate and contour-draw the two types of data bodies for each work area based on the first and second types of data bodies, forming initial coherent bodies containing fault zone characteristic information for each work area, and further forming corresponding independent coherent body models. The fusion model generation module 64 is implemented according to the method described in step S140 above, and is configured to perform work area overlay processing on the independent coherent body models corresponding to each work area to form a fusion model used to display the complete strike-slip fault characteristics.

[0057] This invention discloses a planar fusion method and system for large-scale strike-slip faults across multiple work areas. The method and system sequentially process 3D seismic parameters and coherence volumes from different work areas, performing color unification and overlaying of overlapping areas to form a fusion model that comprehensively displays the planar features of large-scale strike-slip faults. The fusion model generated in this embodiment utilizes techniques for characterizing and analyzing ultra-deep complex strike-slip faults in basins, fusing and displaying 3D seismic data from multiple work areas based on different parameters. This not only solves the problems of only seeing localized parts of the strike-slip fault across multiple work areas and the inconsistency in displayed fault features due to inconsistent coherence parameters between different work areas, but also determines the boundaries and main sections of the complete strike-slip fault zone. This allows for the study of the planar and geometric features of large-scale strike-slip fault zones at different times and strata, as well as the study of the tectonic evolution and degree of fault development, guiding the selection of exploration and development well locations and the optimization of well trajectory design.

[0058] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

[0059] It should be understood that the embodiments disclosed herein are not limited to the specific structures, processing steps, or materials disclosed herein, but should be extended to equivalent substitutions of these features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0060] The phrase "an embodiment" or "an embodiment" used in this specification means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Therefore, the phrase "an embodiment" or "an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0061] While the embodiments disclosed in this invention are as described above, the content is merely for the purpose of facilitating understanding of the invention and is not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and changes in form and detail of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection of this invention shall still be determined by the scope defined in the appended claims.

Claims

1. A method for multi-area planar fusion of large strike-slip faults, comprising: Obtain coherent body boundary data and coherent body data corresponding to different work areas within the current fault, wherein the coherent body data includes the location and morphological information of the coherent bodies within the corresponding work area; The coherent volume data of each work area is stored as a first type of data body in a first format, and the coherent volume boundary data of each work area is stored as a second type of data body in a second format. Based on the first type of data body and the second type of data body, the two types of data bodies of each work area are integrated and contour lines are drawn. Initial coherence bodies containing the corresponding fault zone feature information are formed for different work areas, and then corresponding independent coherence body models are formed. The independent coherent models corresponding to each work area are overlaid to form a fusion model that displays the complete strike-slip fault characteristics.

2. The method according to claim 1, characterized in that, Before the step of storing the coherent volume boundary data of each work area as a second type of data volume in the second format, the method further includes: performing bounding box closure processing on the coherent volume boundary data of each work area.

3. The method according to claim 1, characterized in that, Based on two types of data volumes in the same work area, contour lines are drawn using the minimum tension method to form the initial coherence volume for the current work area.

4. The method according to claim 3, characterized in that, The initial coherence volume of the current work area is sequentially processed by deleting contour lines and primary colors to form the independent coherence volume model.

5. The method according to any one of claims 1 to 4, characterized in that, The step of storing the coherent volume data of each work area as a first type of data volume in a first format includes: Load the coherent data corresponding to the current work area into the UE software; Use ue software for data preprocessing; After each column of data in the position and morphology information of the preprocessed coherent volume data, insert a comma in English format, thereby converting the coherent volume data of the current work area into the first type of data volume in the first format.

6. The method according to claim 5, characterized in that, The data preprocessing step using UE software includes: deleting invalid data from the coherent volume data.

7. The method according to any one of claims 1 to 4, characterized in that, The step of overlaying the independent coherent body models corresponding to each work area to form a fused model that displays the complete strike-slip fault characteristics includes: Based on the location coordinate information, the independent coherent body models corresponding to each work area are overlaid, and the colors of the different independent coherent body models are adjusted independently to form the fused model with a unified color tone.

8. The method according to claim 1, characterized in that, The first format is xyz format, and the second format is dfd format.

9. The method according to claim 1, characterized in that, The steps of acquiring coherent body boundary data and coherent body data corresponding to different work areas within the current fault include: acquiring coherent body boundary data and coherent body data with an initial format corresponding to different work areas, wherein the initial format is dat format.

10. A multi-zone planar fusion system for large strike-slip faults, comprising: The basic data acquisition module is configured to acquire coherent body boundary data and coherent body data corresponding to different work areas within the current fault. The coherent body data includes the location and morphological information of the coherent bodies within the corresponding work area. The basic data format conversion module is configured to store the coherent volume data of each work area as a first type of data body in a first format, and to store the coherent volume boundary data of each work area as a second type of data body in a second format. The independent coherence volume generation module is configured to integrate the two types of data volumes of each work area and perform contour line drawing based on the first type of data volume and the second type of data volume, thereby forming an initial coherence volume containing the corresponding fault zone feature information for different work areas, and further forming a corresponding independent coherence volume model. The fusion model generation module is configured to perform work area overlay processing on the independent coherent body models corresponding to each work area to form a fusion model used to display the complete strike-slip fault characteristics.

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