Deterministic modeling method and device for strike-slip fracture nuclear band structure

Abstract

The invention provides a deterministic modeling method and device for a strike-slip fracture nuclear band structure, and relates to the technical field of velocity modeling in oil and gas resource exploration, and the method comprises the steps: determining the distribution range of a strike-slip fracture fracture band, so as to determine velocity parameters corresponding to each structure in a stratum and a strike-slip fracture fracture band reservoir body; on the basis of the sedimentary background stratum geologic model, speed parameters corresponding to the sedimentary background stratum are filled, and a sedimentary background stratum speed model is obtained; on the basis of the fracture zone control range and the reservoir body geologic model, filling speed parameters corresponding to all structures in the strike-slip fracture fracture zone reservoir body to obtain a fracture zone control range and reservoir body speed model; and according to the difference of the geological evolution process, combining to obtain a strike-slip fracture fracture zone geological model and a strike-slip fracture fracture zone speed model. According to the method, instability caused by the fact that conventional software adopts a floating layer for modeling is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of velocity modeling in oil and gas resource exploration, and is used to realize the deterministic modeling of the velocity structure of carbonate reservoirs in the strike-slip fault fracture zone. Specifically, it relates to a method and device for deterministic modeling of the strike-slip fault core zone structure. Background Art

[0002] Due to the strong compression or strong stretching effect of strike-slip faults, the reservoir body structure in the strike-slip fault fracture zone is complex. From the statistical results of acoustic logging records, the velocities of the reservoirs and surrounding rocks in the strike-slip fault fracture zone change violently. The velocities of different types of reservoirs, namely Type I, Type II, and Type III, are different, and the velocities of the same type of reservoir also distribute in a relatively wide range. Therefore, higher requirements are put forward for the accuracy of velocity modeling in the strike-slip fault fracture zone.

[0003] The geological modeling methods for reservoirs mainly include two categories: deterministic modeling and stochastic modeling. In the initial stage of the development of reservoirs in the strike-slip fault fracture zone, the logging data is less, and due to the particularity of carbonate reservoirs, the logging data in the target interval of most wells is incomplete, and the information available for constructing variograms is less, which restricts the application of reservoir stochastic modeling methods in the characterization of such reservoirs. In addition, reservoir stochastic modeling methods are also not applicable to the modeling and forward simulation processes aimed at clarifying the seismic response characteristics corresponding to a certain geological body.

[0004] In order to clarify the seismic response characteristics of a certain type of geological body, a deterministic modeling method is usually adopted to establish a targeted geological body velocity model for forward simulation. Many mature domestic and foreign geophysical forward or interpretation software, such as Tesseral, GeoScope, and SMI, includes conventional deterministic velocity modeling functions, which are simple and convenient. Conventional deterministic velocity modeling methods usually use existing seismic horizons to construct the sedimentary background, determine the boundaries of lithologic bodies in a polygonal manner, and quickly construct a relatively simple geological body model by embedding known special geological bodies into the sedimentary background. By filling the corresponding velocity and density parameters in the lithologic polygons, the establishment of the geological body velocity model can be achieved. However, due to the simultaneous development of multiple sets of relatively low-velocity multi-scale reservoirs and relatively high-velocity fractured breccias in the fault fracture zone, the reservoir structure is highly complex, and the conventional deterministic velocity modeling method is severely restricted in the fine construction of the strike-slip fault fracture zone reservoir velocity model. In addition, conventional deterministic velocity modeling methods usually use the relative order of floating layers to define the inclusion and superimposition relationships between different geological anomalies. This results in instability during the conversion from the depth domain to the time domain and the forward simulation process during the operation of the software, leading to the repetition and inefficiency of the modeling forward work.

[0005] Aiming at the problems of the prior art, the present invention provides a method and device for deterministic modeling of the strike-slip fault core zone structure. Summary of the Invention

[0006] In view of the problems of the current prior art, the present invention provides a method for deterministic modeling of the strike-slip fault core zone structure, and the method comprises the following steps:

[0007] Define the distribution range of the strike-slip fault fracture zone to determine the velocity parameters corresponding to each structure inside the formation and the strike-slip fault fracture zone reservoir body;

[0008] Based on the geological model of the sedimentary background formation, fill in the velocity parameters corresponding to the sedimentary background formation to obtain the sedimentary background formation velocity model;

[0009] Based on the fracture zone control range and the geological model of the reservoir body, fill in the velocity parameters corresponding to each structure inside the strike-slip fault fracture zone reservoir body to obtain the fracture zone control range and the reservoir body velocity model;

[0010] According to the differences in the geological evolution process, combine the geological model of the sedimentary background formation, the sedimentary background formation velocity model, the fracture zone control range and the geological model of the reservoir body, and the fracture zone control range and the reservoir body velocity model to obtain the geological model of the strike-slip fault fracture zone and the velocity model of the strike-slip fault fracture zone.

[0011] According to an embodiment of the present invention, the velocity parameters corresponding to each structure inside the formation and the strike-slip fault fracture zone reservoir body are determined through the following steps:

[0012] Comprehensively analyze the logging interpretation data and the development data, distinguish the surrounding rock, fracture zone and collapse breccia inside the strike-slip fault fracture zone reservoir body in different depth range formations, and divide the fracture zone into caves and dissolution pores according to the reservoir type, and statistically calculate the average acoustic velocity of each structure inside the formation and the strike-slip fault fracture zone reservoir body as the velocity parameter.

[0013] According to an embodiment of the present invention, the geological model of the sedimentary background formation is constructed through the following steps:

[0014] Select the continuous in-phase axis corresponding to the change of the tectonic movement period or the lithology change in the seismic profile as the marker horizon, record the peak time of each seismic trace in the marker horizon, and form the seismic horizon corresponding to the marker horizon;

[0015] Use the computer graphics method to construct the sedimentary background formation by using the seismic horizon, and fill different sedimentary background formations with different colors to obtain the geological model of the sedimentary background formation.

[0016] According to an embodiment of the present invention, the sedimentary background formation velocity model is obtained through the following steps:

[0017] Based on the sedimentary background formation geological model, use the image segmentation method based on RGB difference classification to extract the distribution ranges of each sedimentary background formation, and assign corresponding velocity parameters to each sedimentary background formation within the corresponding distribution ranges to obtain the sedimentary background formation velocity model.

[0018] According to an embodiment of the present invention, the fracture zone control range and reservoir body geological model are constructed through the following steps:

[0019] Adopt computer graphics methods to respectively construct the fracture zone control range of the strike-slip fault, and the structures, relative positions and distribution ranges of the collapsed breccias, caves and dissolved pores inside the reservoir body, and fill different structures with different colors to obtain the fracture zone control range and reservoir body geological model.

[0020] According to an embodiment of the present invention, the fracture zone control range and reservoir body velocity model are obtained through the following steps:

[0021] Based on the fracture zone control range and reservoir body geological model, use the image segmentation method based on RGB difference classification to respectively extract the distribution ranges of the fracture zone control range of the strike-slip fault and the collapsed breccias, caves and dissolved pores inside the reservoir body, and assign corresponding velocity parameters to each structure within the corresponding distribution ranges to obtain the fracture zone control range and reservoir body velocity model.

[0022] According to an embodiment of the present invention, the strike-slip fault fracture zone geological model and the strike-slip fault fracture zone velocity model are obtained through the following steps:

[0023] Use the intersection operation and union operation of set theory to orderly combine the sedimentary background formation geological model, the sedimentary background formation velocity model, the fracture zone control range and reservoir body geological model, and the fracture zone control range and reservoir body velocity model to obtain the strike-slip fault fracture zone geological model and the strike-slip fault fracture zone velocity model. Among them, according to the sequence relationship between the sedimentary background formation and the development of the strike-slip fault fracture zone, use the intersection operation of set theory for combination; according to the symbiosis of each structure inside the strike-slip fault fracture zone reservoir body, use the union operation of set theory for combination.

[0024] According to an embodiment of the present invention, the strike-slip fault fracture zone geological model is obtained through the following steps:

[0025] Use the intersection operation of set theory to combine the fracture zone control range in the fracture zone control range and reservoir body geological model into the sedimentary background formation geological model to obtain an intermediate geological model;

[0026] Using the union operation combination of set theory, combine the control range of the fracture zone and each structure inside the reservoir body in the reservoir body geological model into the intermediate geological model to obtain the geological model of the strike-slip fault fracture zone;

[0027] The strike-slip fault fracture zone velocity model is obtained through the following steps:

[0028] Using the intersection operation combination of set theory, combine the control range of the fracture zone in the control range of the fracture zone and the reservoir body velocity model into the sedimentary background formation velocity model to obtain an intermediate velocity model;

[0029] Using the union operation combination of set theory, combine the control range of the fracture zone and each structure inside the reservoir body in the reservoir body velocity model into the intermediate velocity model to obtain the strike-slip fault fracture zone velocity model.

[0030] According to another aspect of the present invention, there is also provided a storage medium, which contains a series of instructions for executing the method steps described in any one of the above.

[0031] According to another aspect of the present invention, there is also provided a device for deterministic modeling of the strike-slip fault core zone structure, which executes the method described in any one of the above. The device includes:

[0032] A velocity parameter module, which clarifies the distribution range of the strike-slip fault fracture zone to determine the velocity parameters corresponding to each structure inside the formation and the strike-slip fault fracture zone reservoir body;

[0033] A formation modeling module, which fills the velocity parameters corresponding to the sedimentary background formation on the basis of the sedimentary background formation geological model to obtain the sedimentary background formation velocity model;

[0034] A fracture zone modeling module, which fills the velocity parameters corresponding to each structure inside the strike-slip fault fracture zone reservoir body on the basis of the control range of the fracture zone and the reservoir body geological model to obtain the control range of the fracture zone and the reservoir body velocity model;

[0035] A model combination module, which combines the sedimentary background formation geological model, the sedimentary background formation velocity model, the control range of the fracture zone and the reservoir body geological model, and the control range of the fracture zone and the reservoir body velocity model according to the differences in the geological evolution process to obtain the geological model of the strike-slip fault fracture zone and the strike-slip fault fracture zone velocity model.

[0036] The present invention provides a method and device for deterministic modeling of the strike-slip fault core zone structure. Compared with the prior art, it has the following advantages:

[0037] 1) The present invention can provide a modeling method for complex geological targets. The scope of geological structures and complex geological bodies is determined by pixel size in computer graphics, and the construction of complex structures and geological bodies with complex shapes is achieved by curve fitting and color filling. At the same time, the image segmentation method based on RGB difference classification can accurately distinguish the structural changes caused by color differences in the image, thereby achieving precise positioning of complex geological structures.

[0038] 2) The present invention can provide a stable deterministic model construction method. The ordered combination between complex structural bodies is realized by using the intersection operation and union operation of set theory, thereby determining the positional relationship between the structures of the strike-slip fault fracture zone and avoiding the instability existing in the conventional software using floating layers for modeling.

[0039] 3) The present invention provides a convenience for the effective combination of geology and geophysics. According to the geological model of the strike-slip fault fracture zone in the form of pictures established by geological personnel, geophysical personnel can effectively convert the pictures into a velocity model in numerical format for forward simulation by using the present invention.

[0040] Other features and advantages of the present invention will be described in the subsequent specification, and part of them will become obvious from the specification or be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures specifically pointed out in the specification, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings are used to provide further understanding of the present invention, and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation to the present invention. In the drawings:

[0042] Figure 1 The flowchart showing the steps of a deterministic modeling method for the structure of the strike-slip fault core zone according to an embodiment of the present invention;

[0043] Figure 2 The schematic diagram showing the implementation principle of a deterministic modeling method for the structure of the strike-slip fault core zone according to an embodiment of the present invention;

[0044] Figure 3 The schematic diagram showing the seismic profile according to an embodiment of the present invention;

[0045] Figure 4 The schematic diagram showing the geological model of the sedimentary background formation according to an embodiment of the present invention;

[0046] Figure 5 The schematic diagram showing the velocity model of the sedimentary background formation according to an embodiment of the present invention;

[0047] Figure 6 Shows a schematic diagram of the control range of a strike-slip fault fracture zone according to an embodiment of the present invention;

[0048] Figure 7 Shows a schematic diagram of an intermediate velocity model according to an embodiment of the present invention;

[0049] Figure 8 Shows a schematic diagram of the internal structure of a reservoir body in a strike-slip fault fracture zone according to an embodiment of the present invention;

[0050] Figure 9 Shows a schematic diagram of a geological model of a strike-slip fault fracture zone according to an embodiment of the present invention;

[0051] Figure 10 Shows a schematic diagram of a velocity model of a strike-slip fault fracture zone according to an embodiment of the present invention.

[0052] In the drawings, the same components are denoted by the same reference numerals. Additionally, the drawings are not drawn to actual scale. Detailed embodiments

[0053] To make the objectives, technical solutions, and advantages of the present invention clearer, the following further elaborates on the embodiments of the present invention with reference to the accompanying drawings.

[0054] The marine carbonate rocks in the platform basin area of the Tarim Basin are characterized by deep layers and low porosity. Controlled by the fault reverse transformation mechanism, the internal structure of the deep carbonate rock strike-slip faults in Shunbei and its adjacent areas is a core fractured breccia zone and fracture zones developed on one or both sides. The core zone structure of the fault zone controls the development of large-scale reservoir bodies. In recent years, due to the progress of drilling engineering technology and logging technology, a number of wells have been drilled into the fault zone, and conventional logging and imaging logging data have been successfully acquired in the inclined well section and horizontal well section. On the basis of fine fault analysis, by comprehensively using imaging logging and well testing data, combined with the production dynamic data of oil and gas wells, geological personnel have carried out a systematic study on the development mode of strike-slip faults and core zone structures, and proposed that a single fault plane can control multiple groups of fractured breccia zones and fracture zones, forming a "cluster-shaped" reservoir core zone structure, among which the fractured breccia zone has the best reservoir performance. It provides an important theoretical support for optimizing well trajectory design.

[0055] To achieve high-quality exploration and development in the Shunbei area, it is necessary to promote the understanding of the "cluster" structure at the logging scale in the seismic data volume and conduct fine three-dimensional carving of the strike-slip fault-controlled fracture-vug bodies. An important task to achieve this goal is to establish the geological and velocity models of the "cluster" structure of the reservoir in the strike-slip fault fracture zone, and clarify the seismic response characteristics corresponding to the "cluster" structure at the logging scale through forward simulation tests. Due to the strong compression or strong stretching effect of the strike-slip fault, the reservoir body structure in the strike-slip fault fracture zone is complex: judging from the statistical results of acoustic logging records, the velocities of the reservoir and surrounding rocks in the strike-slip fault fracture zone change violently, the velocities of different types of reservoirs, namely Type I, Type II and Type III, are different, and the velocities of the same type of reservoir also distribute in a relatively wide range. Therefore, higher requirements are put forward for the accuracy of velocity modeling of the strike-slip fault fracture zone.

[0056] The geological modeling methods for reservoirs mainly include two categories: deterministic modeling and stochastic modeling.

[0057] The reservoir stochastic modeling method is based on probability theory and uses stochastic simulation methods to obtain multiple equally probable realizations of different elastic and physical properties of the reservoir. The core of the method is the variogram of relevant elastic and physical properties. Obtaining a relatively reliable variogram depends on the statistical analysis of a large number of well data of the same type in the same area. In the initial stage of the development of the reservoir in the strike-slip fault fracture zone, the logging data is scarce, and due to the particularity of carbonate reservoirs, the logging data of most wells in the target interval is incomplete, and the information available for constructing the variogram is less, which restricts the application of the reservoir stochastic modeling method in the characterization of such reservoirs. In addition, the reservoir stochastic modeling method is also not applicable to the modeling and forward simulation processes aimed at clarifying the seismic response characteristics corresponding to a certain geological body.

[0058] To clarify the seismic response characteristics of a certain type of geological body, a deterministic modeling method is usually adopted to establish a targeted velocity model of the geological body for forward simulation. Many mature geophysical forward or interpretation software at home and abroad, such as Tesseral, GeoScope, and SMI, include conventional deterministic velocity modeling functions, which are simple and convenient. The conventional deterministic velocity modeling method usually uses existing seismic horizons to construct the sedimentary background, determines the boundaries of lithological bodies in a polygonal manner, and quickly constructs a relatively simple geological body model by embedding known special geological bodies into the sedimentary background. By filling the corresponding velocity and density parameters in the lithological polygons, the establishment of the geological body velocity model can be achieved. However, due to the simultaneous development of multiple sets of relatively low-velocity multi-scale reservoirs and relatively high-velocity fractured breccias in the fracture zone, the reservoir structure is highly complex, and the conventional deterministic velocity modeling method is severely restricted in the fine construction of the reservoir velocity model of the strike-slip fracture zone. In addition, the conventional deterministic velocity modeling method usually uses the relative order of floating layers to define the inclusion and superposition relationships between different geological anomalies. This leads to instability in the software during the conversion from the depth domain to the time domain and the forward simulation process, resulting in the repetition and inefficiency of the modeling forward work.

[0059] The prior art (CN106896421A) can stably achieve the deterministic modeling of simple geological bodies, but has poor control over the model and lacks attempts on complex models. The prior art (Stratified carving technology and practice of strike-slip fracture zone reservoirs in the northern Tarim area, China Geoscience Union Annual Meeting, 2021.11) studied the use of conventional attributes, specifically using structural tensor attributes and wave impedance attributes to determine the fracture network profile and effective reservoirs of actual seismic data. The prior art (Spatial structure differences and three-dimensional modeling of fault-controlled karst systems - taking the Shunbei No. 1 fault zone as an example, Science Technology and Engineering, 2021.10) studied the use of Petrel software for attribute analysis of actual seismic data, and established fracture models and fault-karst body models based on eigen-coherence attributes and structural tensor attributes respectively. The characterization of the internal structure of the strike-slip fault is relatively rough and cannot be used for quantitative analysis of seismic response structures. The prior art (Heterogeneous reservoir prediction of ultra-deep strike-slip fault-damaged zone constrained with local seismic anomaly data, Earth Science Informatics, 2022.07) studied the use of attribute-constrained sparse pulse inversion to characterize the internal fractures and cave bodies of the strike-slip fracture zone, but did not describe the modeling method of the strike-slip fault zone.

[0060] In summary, the current methods for modeling strike-slip fault-controlled fracture-cavity reservoirs mainly have the following problems: First, the deterministic modeling methods in conventional software can only meet the needs of simple geological body modeling and are powerless in the face of the complex structure of strike-slip fault fracture zones. When the model is relatively complex, the stability of the modeling results is not strong. Second, when the forward modeling is aimed at clarifying the seismic response characteristics corresponding to special geological bodies or special reservoirs, the reservoir stochastic modeling method is no longer applicable, and this type of method has a large dependence on the richness of well data.

[0061] In view of the above problems such as the difficulties and instabilities in constructing the structure of strike-slip fault fracture zone reservoirs using conventional deterministic modeling methods, the present invention provides a deterministic modeling method and device for the velocity structure of carbonate reservoirs in strike-slip fault fracture zones, which improves the modeling efficiency and the stability of the modeling results. The method uses computer graphics methods to construct the structures of different special geological bodies, accurately extracts the positions and distribution ranges of special geological bodies in the sedimentary background using an image segmentation method based on RGB difference classification, and combines different geological bodies under the guidance of the geological evolution process to achieve efficient modeling of the complex structure of strike-slip fault fracture zone reservoirs.

[0062] The present invention can achieve deterministic modeling of the velocity structure of carbonate reservoirs in strike-slip fault fracture zones by combining computer graphics with image segmentation methods under the guidance of the geological evolution process. First, computer graphics methods are used to construct the structures of different special geological bodies, then an image segmentation method based on RGB (Red R, Green G, Blue B, RGB color model) difference classification is used to accurately extract the positions and distribution ranges of special geological bodies in the sedimentary background, and finally, the intersection and union operations of set theory are used to combine different geological bodies under the guidance of the geological evolution process to achieve efficient modeling of the complex structure of strike-slip fault fracture zone reservoirs.

[0063] Figure 1 Shows a flowchart of the steps of a deterministic modeling method for the structure of a strike-slip fault core zone according to an embodiment of the present invention.

[0064] As Figure 1 shown, in step S1, the distribution range of the strike-slip fault fracture zone is clarified to determine the velocity parameters corresponding to each structure inside the formation and the strike-slip fault fracture zone reservoir.

[0065] In one embodiment, in step S1, the velocity parameters corresponding to each structure inside the formation and the strike-slip fault fracture zone reservoir are determined through the following steps: comprehensively analyze the logging interpretation data and development data, distinguish the surrounding rock, fracture zone, and collapse breccia inside the strike-slip fault fracture zone reservoir in different depth ranges of the formation, and divide the fracture zone into caves and dissolution pores according to the reservoir type, and statistically calculate the average acoustic velocity of each structure inside the formation and the strike-slip fault fracture zone reservoir as the velocity parameter.

[0066] Specifically, based on the geological understanding that the reservoir body in the strike-slip fault fracture zone has a "grid-like" structure, starting from various logging data and development data, the corresponding sub-areas of different classifications including the surrounding rock, fracture zone, and breccia zone are defined within the "grid-like" structure. According to the reservoir types of the logging interpretation conclusions, caves and dissolution pores are respectively divided, and the average velocity of each structure is statistically calculated using acoustic logging data as the velocity parameter.

[0067] It should be noted that the distribution range of the strike-slip fault fracture zone can be determined using different logging data and development data according to actual requirements, so as to determine the velocity parameters corresponding to each structure within the formation and the strike-slip fault fracture zone reservoir body. The present invention does not limit the types of logging data and development data.

[0068] As Figure 1 shown, in step S2, based on the geological model of the sedimentary background formation, the corresponding velocity parameters of the sedimentary background formation are filled to obtain the sedimentary background formation velocity model. Specifically, the geological model of the sedimentary background formation is in the form of a picture.

[0069] In one embodiment, in step S2, the geological model of the sedimentary background formation is constructed through steps S21 - S22.

[0070] In step S21, continuous coherent axes corresponding to the changes in the stages of tectonic movement or lithology changes in the seismic profile are selected as marker beds, and the peak times of each seismic trace in the marker beds are recorded to form the seismic horizons corresponding to the marker beds (as Figure 3 shown, the two black solid lines are the seismic horizons corresponding to the two interpreted marker beds).

[0071] Specifically, taking the tracking of the peak of the seismic trace as the criterion, the seismic horizons corresponding to the marker beds included in the target seismic profile are interpreted: based on geological understanding, continuous coherent axes corresponding to the changes in the stages of tectonic movement or lithology changes in the seismic profile are selected as marker beds. For convenience, the peak times of each seismic trace in the marker beds are uniformly recorded to form the seismic horizons corresponding to the marker beds.

[0072] In step S22, a computer graphics method is used to construct the sedimentary background formation using the seismic horizons, and different sedimentary background formations are filled with different colors to obtain the geological model of the sedimentary background formation (as Figure 4 shown, the geological model of the sedimentary background formation in the form of a picture).

[0073] Specifically, the curve fitting method in computer graphics is used to define the specified formation ranges between different marker beds and between the marker beds and the top and bottom of the model. Different formation ranges are filled with different colors to highlight the sedimentation differences and velocity differences of different formations. In step S22, attention should be paid to the integrity of all formation ranges and color filling, corresponding to the integrity of the entire sedimentation process.

[0074] Furthermore, in one embodiment, in step S22, with the aid of the Photoshop drawing software, the geological model of the sedimentary background formation is constructed by using pixels, curved curves, closed curves and colors in computer graphics. It should be noted that different computer graphics methods can be used to construct the geological model of the sedimentary background formation according to actual needs, and the present invention does not limit the type of computer graphics methods.

[0075] In one embodiment, in step S2, the velocity model of the sedimentary background formation is obtained through the following steps: based on the geological model of the sedimentary background formation, the distribution ranges of each sedimentary background formation are extracted by using the image segmentation method based on RGB difference classification, and corresponding velocity parameters are assigned to each sedimentary background formation within the corresponding distribution ranges, thereby obtaining the velocity model of the sedimentary background formation (as Figure 5 shown, the velocity model of the sedimentary background formation constructed by combining the computer graphics method and the image segmentation method based on RGB difference classification).

[0076] Specifically, different sedimentary background formations in the geological model of the sedimentary background formation are filled with different colors, and different colors have different combinations of RGB values. For example, the RGB values corresponding to black and red are [0, 0, 0] and [255, 0, 0] respectively. Furthermore, according to the difference of RGB value combinations, image segmentation classification is carried out. The same color belongs to the same class, the same class is represented by the same numerical value, different colors belong to different classes, and different classes are represented by different numerical values, so as to numerically represent the sedimentary background formation combination in image form. Then, for the numerically represented sedimentary background formation, the numerically represented formation is replaced with the velocities corresponding to different formations, thereby obtaining the velocity model of the sedimentary background formation.

[0077] It should be noted that different image segmentation methods based on RGB difference classification can be used to construct the velocity model of the sedimentary background formation according to actual needs, and the present invention does not limit the type of image segmentation methods.

[0078] As Figure 1 shown, in step S3, based on the fracture zone control range and the geological model of the reservoir body, the velocity parameters corresponding to each structure inside the strike-slip fault fracture zone reservoir body are filled, thereby obtaining the velocity model of the fracture zone control range and the reservoir body. Specifically, the fracture zone control range and the geological model of the reservoir body are in picture format.

[0079] In one embodiment, in step S3, the fracture zone control range and the geological model of the reservoir body are constructed through the following steps: Using computer graphics methods, the control range of the strike-slip fault fracture zone (as shown in Figure 6 , the control range of the strike-slip fault fracture zone in picture format) and the structures, relative positions, and distribution ranges of the collapsed breccias, caves, and dissolution pores inside the reservoir body (as shown in Figure 8 , the internal structure model of the strike-slip fault fracture zone reservoir body in picture format) are constructed respectively, and different structures are filled with different colors to obtain the fracture zone control range and the geological model of the reservoir body.

[0080] Specifically, the method for constructing the fracture zone control range and the geological model of the reservoir body is the same as the method for constructing the geological model of the sedimentary background strata in step S2, but the operation objects are different. The curve fitting method in computer graphics is used to define the structures of the collapsed breccias, caves, and dissolution pores in the strike-slip fault fracture zone reservoir body, their relative position relationships in the model, and their respective distribution ranges. Then, different structures are filled with different colors to highlight the genetic differences and velocity differences of each structure in the strike-slip fault fracture zone reservoir body, and the fracture zone control range and the geological model of the reservoir body are obtained.

[0081] Further, in one embodiment, in step S3, the fracture zone control range and the geological model of the reservoir body are constructed by means of the Photoshop drawing software using the pixels, curved curves, closed curves, and colors of computer graphics. It should be noted that different computer graphics methods can be used to construct the fracture zone control range and the geological model of the reservoir body according to actual needs, and the present invention does not limit the type of computer graphics methods.

[0082] In one embodiment, in step S3, the fracture zone control range and the velocity model of the reservoir body are obtained through the following steps: Based on the fracture zone control range and the geological model of the reservoir body, the distribution ranges of the strike-slip fault fracture zone control range and the collapsed breccias, caves, and dissolution pores inside the reservoir body are extracted respectively using the image segmentation method based on RGB difference classification, and the corresponding velocity parameters are assigned to each structure within the corresponding distribution ranges to obtain the fracture zone control range and the velocity model of the reservoir body.

[0083] Specifically, the method and steps for constructing the fracture zone control range and reservoir body velocity model are the same as those for constructing the sedimentary background formation velocity model in step S2, but the operation objects are different. According to the difference in RGB value combinations, image segmentation and classification are performed. The same color belongs to the same class, and the same class is represented by the same value. Different colors belong to different classes, and different classes are represented by different values, so as to numerically represent each structure of the strike-slip fault zone in the form of an image. Then, different structures after numericalization are replaced with different velocities to obtain the fracture zone control range and reservoir body velocity model.

[0084] It should be noted that different image segmentation methods based on RGB difference classification can be used according to actual needs to construct the fracture zone control range and reservoir body velocity model, and the present invention does not limit the type of image segmentation method.

[0085] As Figure 1 shown, in step S4, according to the difference in the geological evolution process, the sedimentary background formation geological model, the sedimentary background formation velocity model, the fracture zone control range and reservoir body geological model, and the fracture zone control range and reservoir body velocity model are combined to obtain the strike-slip fault fracture zone geological model and the strike-slip fault fracture zone velocity model.

[0086] In one embodiment, in step S4, the strike-slip fault fracture zone geological model and the strike-slip fault fracture zone velocity model are obtained through the following steps: the sedimentary background formation geological model, the sedimentary background formation velocity model, the fracture zone control range and reservoir body geological model, and the fracture zone control range and reservoir body velocity model are orderly combined by using the intersection operation and union operation of set theory to obtain the strike-slip fault fracture zone geological model and the strike-slip fault fracture zone velocity model, wherein, according to the sequence relationship between the sedimentary background formation and the development of the strike-slip fault fracture zone, the intersection operation of set theory is used for combination; according to the symbiosis of each structure inside the strike-slip fault fracture zone reservoir body, the union operation of set theory is used for combination.

[0087] Specifically, according to the difference in the geological evolution process, each structural component of the sedimentary background formation and the strike-slip fault fracture zone generated in steps S2 and S3 is orderly combined by using the intersection operation and union operation of set theory to obtain a complete strike-slip fault fracture zone geological model and its corresponding velocity model. Further, according to the sequence relationship between the sedimentary background formation and the development of the strike-slip fault fracture zone, the intersection operation of set theory is used for combination; according to the symbiosis of each structure of the strike-slip fault fracture zone, the union operation of set theory is used for combination, so as to obtain a complete strike-slip fault fracture zone geological model and its corresponding velocity model.

[0088] In one embodiment, in step S4, the geological model of the strike-slip fault fracture zone is obtained through the following steps: By using the intersection operation combination of set theory, the fracture zone control range in the fracture zone control range and the reservoir body geological model is combined with the sedimentary background formation geological model to obtain an intermediate geological model; By using the union operation combination of set theory, the fracture zone control range and each structure inside the reservoir body in the reservoir body geological model are combined with the intermediate geological model to obtain the geological model of the strike-slip fault fracture zone (as Figure 9 shown, the geological model of the strike-slip fault fracture zone in picture format constructed according to geological understanding).

[0089] In one embodiment, in step S4, the velocity model of the strike-slip fault fracture zone is obtained through the following steps: By using the intersection operation combination of set theory, the fracture zone control range in the fracture zone control range and the reservoir body velocity model is combined with the sedimentary background formation velocity model to obtain an intermediate velocity model (as Figure 7 shown, the intermediate velocity model after adding the fracture zone control range to the sedimentary background formation velocity model by using the computer graphics method combined with the image segmentation method of RGB difference classification and using the intersection operation of set theory); By using the union operation combination of set theory, the fracture zone control range and each structure inside the reservoir body in the reservoir body velocity model are combined with the intermediate velocity model to obtain the velocity model of the strike-slip fault fracture zone (as Figure 10 shown, the velocity model of the strike-slip fault fracture zone after adding each structure of the fracture zone reservoir body to the intermediate velocity model by using the computer graphics method combined with the image segmentation method of RGB difference classification and using the intersection operation of set theory).

[0090] This application can construct a stable velocity model for the complex strike-slip fault fracture zone reservoir body structure, improving the accuracy and efficiency of modeling.

[0091] Figure 2 Shows the implementation schematic diagram of a deterministic modeling method for the strike-slip fault core zone structure according to an embodiment of the present invention.

[0092] As Figure 2 shown, the following steps are taken to implement the deterministic modeling of the strike-slip fault core zone structure:

[0093] Comprehensively analyze the logging interpretation data and development data, distinguish different structures inside the strike-slip fault fracture zone reservoir body, and statistically calculate the average value of the acoustic wave velocity of each structure in the strike-slip fault fracture zone as the velocity parameter.

[0094] Taking the peak of the traced seismic trace as the criterion, interpret the seismic horizons corresponding to the marker beds included in the target seismic profile. Use the computer graphics method to construct the sedimentary background formation by using the seismic horizons corresponding to the marker beds, and fill different colors for different formations to obtain the sedimentary background formation geological model.

[0095] Using an image segmentation method based on RGB difference classification to extract the distribution ranges of each sedimentary background formation, and assigning corresponding velocity parameters to the sedimentary background formation within the corresponding distribution ranges to obtain a sedimentary background formation velocity model.

[0096] Using computer graphics methods to respectively construct the structures, relative positions in the model and distribution ranges of the collapsed breccias, caves and dissolution pores inside the strike-slip fault fracture zone reservoir bodies, and filling different structures with different colors to obtain the fracture zone control range and reservoir body geological model.

[0097] Using the image segmentation method based on RGB difference classification to respectively extract the distribution ranges of the strike-slip fault fracture zone control range and the collapsed breccias, caves and dissolution pores inside the reservoir body, and assigning corresponding velocity parameters to each structure within the corresponding distribution ranges to obtain the fracture zone control range and reservoir body velocity model.

[0098] According to the differences in the geological evolution process, the various structural components of the sedimentary background formation and the strike-slip fault fracture zone are orderly combined by using the intersection operation and union operation of set theory to obtain a complete strike-slip fault fracture zone geological model and its corresponding velocity model.

[0099] In one embodiment, a deterministic modeling method for the structure of the strike-slip fault core zone provided by the present invention is used to perform deterministic modeling on a certain target strike-slip fault core zone structure, and steps S31 - S37 are as follows:

[0100] In step S31, the purpose of the present invention is to construct a velocity model for the structure of the strike-slip fault fracture zone. It is necessary to distinguish the surrounding rock and each structure of the strike-slip fault reservoir body in advance from well data, and count the logging scale and average velocity of each structure as the basis for constructing the seismic scale model.

[0101] In step S32, the present invention needs to interpret the marker horizons in the seismic profile in advance as an aid. Therefore, according to geological understanding, continuous in-phase axes corresponding to the period changes of tectonic movements or lithological changes in the seismic profile (as Figure 3 shown) are selected as marker horizons, and the peak times of each seismic trace in the marker horizons are recorded to obtain the seismic horizons of the marker horizons, as shown by the two black solid lines in Figure 3 .

[0102] In step S33, using computer graphics methods to construct the sedimentary background formation by using the seismic horizons of the marker horizons, and filling different formations with different colors to obtain the sedimentary background formation geological model: With the help of the PhotoShop drawing software, the model is constructed by using the pixels, curved curves, closed curves and colors of computer graphics. Among them, the model size is represented by the number of pixels, as Figure 4The four-layer deposited background strata shown have 340 and 450 pixel points longitudinally and transversely, respectively. The curves obtained by key-point B-spline interpolation represent each stratum, as Figure 4 shown. The boundary line between the two colors corresponds to the stratum positions of different marker beds in step S32. The closed curves formed by the strata and the strata and the model boundaries represent the corresponding ranges of each stratum, as Figure 4 shown. The closed curves formed by the boundaries of each color are the corresponding ranges of each stratum. At the same time, the differential deposition of each stratum is represented by filling the closed curves with different colors, as Figure 4 shown. The 4 colors represent 4 strata. Among them, the geological significance of the integrity of the filling with different colors in the model is the integrity of the entire sedimentation process.

[0103] In step S34, the distribution ranges of each deposited stratum are extracted by using an image segmentation method based on RGB difference classification, and the corresponding velocity parameters are assigned to the strata within the corresponding distribution ranges, obtaining a velocity model of the deposited background strata: Figure 4 In [the figure], from top to bottom, four sedimentary strata are represented by red, yellow, blue, and black colors respectively, and their RGB value combinations are [255 0 0], [255 255 0], [0 255 255], and [0 00] (since Figure 4 it is a grayscale image, the four colors of red, yellow, blue, and black are not shown).

[0104] The implementation process of the image segmentation method based on RGB difference classification is as follows: First, according to the difference in the RGB combinations of each color, the number of color categories existing in all pixel points is statistically counted, the RGB value combination corresponding to each category is recorded, and a value is assigned to each category. Those with relatively small RGB value combinations are grouped into the same category; then, according to the statistical color classification and the corresponding RGB value combinations, they are compared and classified with the RGB value combination of each pixel point in turn, and at the same time, the value corresponding to the category of the pixel point is assigned. The same classification is represented by the same value, and different classifications are represented by different values, thus realizing automatic image segmentation, that is, realizing the segmentation of the stratum range.

[0105] The numerical value of the image classification is not equal to the velocity value of the deposited background strata. Therefore, find the numerical value corresponding to each stratum in the image classification result and replace this numerical value with the velocity corresponding to the stratum, obtaining the velocity model corresponding to the deposited background strata. The embodiment of the present invention Figure 4 The velocity model corresponding to the geological model of the deposited background strata shown is as Figure 5 shown.

[0106] In step S35, the overall control range of the strike-slip fault fracture zone is constructed by using computer graphics methods. The structures of the reservoirs in the strike-slip fault fracture zone, the collapsed breccias, caves, and dissolution pores therein, their relative positions in the model, and their distribution ranges are respectively constructed. Different structures are filled with different colors. The control range of the fracture zone and the geological model of the reservoir: The method is the same as that in step S33, but the implementation object is different. With the help of the Photoshop drawing software, the collapsed breccias, caves, and dissolution pores in the reservoirs of the strike-slip fault fracture zone are constructed by using the pixels, curved curves, closed curves, and colors of computer graphics.

[0107] In the embodiment of the present invention, the control range of the constructed strike-slip fault fracture zone is as Figure 6 shown by the green part in (since Figure 6 is a grayscale image, the green color is not shown). The collapsed breccias, caves, and dissolution pores in the reservoirs of the strike-slip fault fracture zone are respectively as Figure 8 shown by the blue, white, and pink parts in (since Figure 8 is a grayscale image, the blue, white, and pink colors are not fully shown). Different structures are distinguished by different colors, and the scales of different structures are represented by the pixel ranges of different colors.

[0108] In step S36, the distribution ranges of the control range of the strike-slip fault fracture zone and the collapsed breccias, caves, and dissolution pores in the reservoir are respectively extracted by using the image segmentation method based on RGB difference classification, and the corresponding velocity parameters are assigned to each structure within the corresponding distribution ranges, obtaining the control range of the fracture zone and the velocity model of the reservoir: The implementation process of the image segmentation method based on RGB difference classification is the same as the description in step S34. In the embodiment of the present invention, the velocity model of the control range of the constructed strike-slip fault fracture zone is also as Figure 6 shown by the green part in, and the velocity models of the collapsed breccias, caves, and dissolution pores in the reservoirs of the strike-slip fault fracture zone are also respectively as Figure 8 shown by the blue, white, and pink parts in.

[0109] In step S37, according to the differences in the geological evolution process, the sedimentary background strata and each structural component of the strike-slip fault fracture zone are orderly combined by using the intersection operation and union operation of set theory, obtaining the complete geological model of the strike-slip fault fracture zone and its corresponding velocity model: Different structures of the reservoirs in the strike-slip fault fracture zone coexist and are included in the control range of the strike-slip fault fracture zone. At the same time, the control range of the strike-slip fault fracture zone is included in the sedimentary background strata. Based on the above geological understanding, the above different structures are orderly combined by using the intersection operation and union operation of set theory. In the embodiment of the present invention, the intermediate velocity model after adding the fracture zone to the sedimentary background by using the intersection operation of set theory is as Figure 7 shown, and the geological model of the strike-slip fault fracture zone is as Figure 9As shown, the velocity model of the strike-slip fault fracture zone for each structure of the rich fracture zone reservoir is as Figure 10 shown.

[0110] In summary, the present invention determines the distribution range of the strike-slip fault fracture zone through logging data and development data, and determines the velocities of each structure within the formation and fracture zone; by obtaining the seismic horizons ([[]] Figure 3 ) of the marker horizons of the seismic profile, uses computer graphics methods to construct the sedimentary background formation ([[]] Figure 4 ), uses the image segmentation method of RGB difference classification to divide the ranges of each formation, and fills the formation velocities to construct the velocity model of the sedimentary background formation ([[]] Figure 5 ). Uses computer graphics methods to construct the fracture zone, uses the image segmentation method of RGB difference classification to divide the range of the strike-slip fault fracture zone ([[]] Figure 6 ), and fills the corresponding velocities, and uses the intersection operation of set theory to construct the intermediate velocity model after adding the fracture zone to the sedimentary background formation ([[]] Figure 7 ). Uses computer graphics methods to construct the internal structure of the fracture zone, uses the image segmentation method of RGB difference classification to divide the ranges of each structure within the strike-slip fault fracture zone ([[]] Figure 8 ), and fills the velocities corresponding to each structure, and uses the intersection operation and union operation of set theory to construct the velocity model of the rich internal structure of the fracture zone ([[]] Figure 10 ).

[0111] A method and device for deterministic modeling of the strike-slip fault core zone structure provided by the present invention can also cooperate with a computer-readable storage medium, on which a computer program is stored, and the computer program is executed to run a method for deterministic modeling of the strike-slip fault core zone structure. The computer program can run computer instructions, and the computer instructions include computer program code, and the computer program code can be in the form of source code, object code form, executable file or some intermediate form, etc.

[0112] The computer-readable storage medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disc, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal, and software distribution medium, etc.

[0113] It should be noted that the content included in the computer-readable storage medium can be appropriately increased or decreased according to the requirements of legislation and patent practice within the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable storage medium does not include electrical carrier signals and telecommunication signals.

[0114] According to another aspect of the present invention, there is also provided a device for deterministic modeling of the strike-slip fault core zone structure, which executes a method for deterministic modeling of the strike-slip fault core zone structure. The device includes: a velocity parameter module, a formation modeling module, a fracture zone modeling module, and a model combination module.

[0115] In one embodiment, the velocity parameter module determines the distribution range of the strike-slip fault fracture zone to determine the velocity parameters corresponding to each structure inside the formation and the strike-slip fault fracture zone reservoir body; the formation modeling module fills in the velocity parameters corresponding to the sedimentary background formation on the basis of the sedimentary background formation geological model to obtain the sedimentary background formation velocity model; the fracture zone modeling module fills in the velocity parameters corresponding to each structure inside the strike-slip fault fracture zone reservoir body on the basis of the fracture zone control range and the reservoir body geological model to obtain the fracture zone control range and the reservoir body velocity model; the model combination module combines the sedimentary background formation geological model, the sedimentary background formation velocity model, the fracture zone control range and the reservoir body geological model, and the fracture zone control range and the reservoir body velocity model according to the differences in the geological evolution process to obtain the strike-slip fault fracture zone geological model and the strike-slip fault fracture zone velocity model.

[0116] In summary, the present invention provides a method and a device for deterministic modeling of the strike-slip fault core zone structure. Compared with the prior art, the following advantages are achieved:

[0117] 1) The present invention can provide a modeling method for complex geological targets. The range of geological structures and complex geological bodies is determined by the pixel size in computer graphics, and the construction of complex structures and geological bodies with complex shapes is realized by curve fitting and color filling. At the same time, the image segmentation method based on RGB difference classification can accurately distinguish the structural changes caused by color differences in the image, so as to realize the precise positioning of complex geological structures.

[0118] 2) The present invention can provide a stable method for constructing a deterministic model. The ordered combination between complex structural bodies is realized by using the intersection operation and union operation of set theory, so as to determine the positional relationship between each structure of the strike-slip fault fracture zone, avoiding the instability existing in the modeling with floating layers adopted by conventional software.

[0119] 3) The present invention provides a convenience for the effective combination of geology and geophysics. According to the strike-slip fault fracture zone geological model in picture format established by geological personnel, geophysical personnel can effectively convert the picture into a velocity model in numerical format for forward simulation by using the present invention.

[0120] It should be understood that the embodiments disclosed in the present invention are not limited to the specific structures, processing steps or materials disclosed herein, but should extend to equivalent alternatives of these features understood by those of ordinary skill in the relevant art. It should also be understood that the terms used herein are for the purpose of describing specific embodiments only and do not imply limitation.

[0121] In the description of the present invention, unless otherwise specified, "plurality" means two or more; the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0122] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0123] Certain terms are used throughout this application document to refer to particular system components. As those skilled in the art will recognize, the same components may generally be referred to by different names, and thus this application document is not intended to distinguish components that differ only in name but not in function. In this application document, the terms "comprise", "include" and "have" are used in an open-ended fashion and should thus be interpreted to mean "including but not limited to...". In addition, the terms "substantially", "essentially" or "approximately" as may be used herein refer to industry-accepted tolerances for the corresponding terms. As the term "coupled" as may be used herein includes direct coupling and indirect coupling via additional components, elements, circuits, or modules, where for indirect coupling the intervening components, elements, circuits, or modules do not change the information of the signal but may adjust its current level, voltage level, and / or power level. Inferred coupling (such as where one element is coupled to another element by inference) includes direct and indirect coupling between the two elements in the same manner as "coupled".

[0124] As used herein, the phrase "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrase "one embodiment" or "an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment.

[0125] Embodiments of the present invention are provided for purposes of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, and to enable others of ordinary skill in the art to understand the invention for designing various embodiments with various modifications suited to particular purposes.

[0126] Although the embodiments disclosed herein are as above, the above description is only an embodiment for facilitating understanding of the present invention, and is not intended to limit the present invention. Any person skilled in the art within the technical field to which the present invention pertains may make any modifications and variations in the form and details of the implementation without departing from the spirit and scope disclosed by the present invention. However, the scope of patent protection of the present invention shall still be subject to the scope defined by the appended claims.

Claims

1. A deterministic modeling method for strike-slip fault core zone structure, characterized by: The method comprises the following steps: Clarify the distribution range of strike-slip fault zones to determine the velocity parameters corresponding to the internal structures of strata and strike-slip fault zone reservoirs; On the basis of the geological model of the sedimentary background strata, velocity parameters corresponding to the sedimentary background strata are filled in to obtain a velocity model of the sedimentary background strata; Based on the geological model of the fracture zone control range and reservoir, the velocity parameters corresponding to the internal structures of the reservoir in the strike-slip fault fracture zone are filled in to obtain the fracture zone control range and reservoir velocity model; According to the differences in geological evolution processes, the sedimentary background stratum geological model, the sedimentary background stratum velocity model, the fracture zone control range and reservoir geological model, and the fracture zone control range and reservoir velocity model are combined to obtain a strike-slip fault fracture zone geological model and a strike-slip fault fracture zone velocity model.

2. The deterministic modeling method for strike-slip fault core zone structure according to claim 1, characterized in that: Determine the velocity parameters corresponding to the internal structures of the formation and strike-slip fault zone reservoir by the following steps: A comprehensive analysis of well logging interpretation data and development data was conducted to distinguish the surrounding rocks, fracture zones and collapsed breccias within the strike-slip fault zone reservoirs in formations of different depth ranges. The fracture zones were divided into caves and dissolution pores according to the reservoir type, and the average acoustic velocity of each structure within the formation and the strike-slip fault zone reservoir was calculated as the velocity parameter.

3. A deterministic modeling method for strike-slip fault core zone structure according to claim 1 or 2, characterized in that: The sedimentary background stratum geological model is constructed by the following steps: Selecting continuous phase axes corresponding to the phase changes of tectonic movement or lithologic changes in the seismic profile as marker layers, recording the peak time of each seismic trace in the marker layer, and forming the seismic horizon corresponding to the marker layer; A computer graphics method is adopted to construct a sedimentary background stratum using the seismic horizon, and different sedimentary background strata are filled with different colors to obtain a geological model of the sedimentary background stratum.

4. A deterministic modeling method for strike-slip fault core zone structure according to any one of claims 1 to 3, characterized in that: The sedimentary background stratum velocity model is obtained by the following steps: Based on the geological model of the sedimentary background strata, the distribution range of each sedimentary background stratum is extracted using an image segmentation method based on RGB difference classification, and corresponding velocity parameters are assigned to each sedimentary background stratum within the corresponding distribution range to obtain the sedimentary background stratum velocity model.

5. A deterministic modeling method for strike-slip fault core zone structure according to any one of claims 2 to 4, characterized in that: The geological model of the fracture zone control range and reservoir is constructed by the following steps: Computer graphics methods are used to construct the control range of the strike-slip fault zone and the structure, relative position and distribution range of collapsed breccia, caves and dissolution pores inside the reservoir. Different structures are filled with different colors to obtain the geological model of the control range of the fracture zone and the reservoir.

6. A deterministic modeling method for strike-slip fault core zone structure according to any one of claims 2 to 5, characterized in that: The fracture zone control range and reservoir velocity model are obtained by the following steps: Based on the geological model of the fracture zone control range and reservoir, the image segmentation method based on RGB difference classification is used to extract the control range of the strike-slip fault fracture zone and the distribution range of collapsed breccia, caves and dissolution pores inside the reservoir. The corresponding velocity parameters are assigned to each structure within the corresponding distribution range to obtain the velocity model of the fracture zone control range and reservoir.

7. A deterministic modeling method for strike-slip fault core zone structure according to any one of claims 1 to 6, characterized in that: The geological model of the strike-slip fault zone and the velocity model of the strike-slip fault zone are obtained by the following steps: The sedimentary background stratum geological model, the sedimentary background stratum velocity model, the fracture zone control range and reservoir geological model, and the fracture zone control range and reservoir velocity model are sequentially combined using set theory intersection and union operations to obtain the strike-slip fault fracture zone geological model and the strike-slip fault fracture zone velocity model. The intersection operation combination of set theory is adopted based on the chronological relationship between the development of the sedimentary background stratum and the strike-slip fault fracture zone; and the union operation combination of set theory is adopted based on the symbiosis of various structures within the strike-slip fault fracture zone reservoir.

8. A deterministic modeling method for strike-slip fault core zone structure according to any one of claims 1 to 7, characterized in that: The geological model of the strike-slip fault zone is obtained by the following steps: Using set theory intersection combination, the fracture zone control range and the fracture zone control range in the reservoir geological model are combined into the sedimentary background stratum geological model to obtain an intermediate geological model; Using the union operation combination of set theory, the fracture zone control range and the internal structures of the reservoir in the reservoir geological model are combined into the intermediate geological model to obtain the geological model of the strike-slip fault fracture zone; The strike-slip fault zone velocity model is obtained by the following steps: Using set theory intersection combination, the fracture zone control range and the fracture zone control range in the reservoir velocity model are combined with the sedimentary background stratum velocity model to obtain an intermediate velocity model; The control range of the fracture zone and the internal structures of the reservoir in the reservoir velocity model are combined into the intermediate velocity model by using the union operation combination of set theory to obtain the strike-slip fault fracture zone velocity model.

9. A storage medium, characterized in that: It contains a series of instructions for executing the method steps according to any one of claims 1 to 8.

10. A deterministic modeling device for strike-slip fault core zone structure, characterized in that: The method according to any one of claims 1 to 8 is performed, wherein the device comprises: Velocity parameter module, which clarifies the distribution range of strike-slip fault zones to determine the velocity parameters corresponding to various structures within the formation and strike-slip fault zone reservoirs; A stratum modeling module fills in the velocity parameters corresponding to the sedimentary background stratum on the basis of the sedimentary background stratum geological model to obtain the sedimentary background stratum velocity model; The fracture zone modeling module fills in the velocity parameters corresponding to the internal structures of the strike-slip fault fracture zone reservoir based on the fracture zone control range and reservoir geological model to obtain the fracture zone control range and reservoir velocity model; A model combination module combines the sedimentary background stratum geological model, the sedimentary background stratum velocity model, the fracture zone control range and reservoir geological model, and the fracture zone control range and reservoir velocity model according to the differences in the geological evolution process to obtain a strike-slip fault fracture zone geological model and a strike-slip fault fracture zone velocity model.

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