Quantitative evaluation methods and apparatus for reservoir control by strike-slip faults in carbonate rocks

Abstract

This invention provides a quantitative evaluation method and apparatus for reservoir control by strike-slip faults in carbonate rocks. The method includes: analyzing three-dimensional seismic data of the strike-slip fault in carbonate rocks to extract coherence attribute maps of the strike-slip fault at deformation interfaces, wherein the deformation interfaces include the top reflection interface of the target carbonate rock layer; constructing a segmented geological model of the strike-slip fault at the top reflection interface; performing finite element analysis on the elastic tensile strain of the strike-slip fault at the top reflection interface, and quantitatively determining the elastic tensile strain distribution of the strike-slip fault at the top reflection interface based on the analysis results; and quantitatively determining the single-well productivity of various parts of the carbonate strike-slip fault based on a pre-defined relationship between the elastic tensile strain of the carbonate strike-slip fault and single-well productivity, according to the elastic tensile strain distribution of the strike-slip fault at the top reflection interface. This method is beneficial for studying reservoir development and favorable locations for hydrocarbon accumulation in carbonate strike-slip faults.

Description

Technical Field

[0001] This invention relates to the field of geological structural analysis technology, and in particular to a quantitative evaluation method and apparatus for reservoir control by strike-slip faults in carbonate rocks. Background Technology

[0002] Strike-slip faults, due to their steep dips, cut through deep strata and often connect major source rocks, especially in ancient marine basins. Paleo-uplifts and the low uplifts and slopes between them play a crucial role in controlling the migration and accumulation of deep hydrocarbons. In recent years, with a series of oil and gas discoveries related to strike-slip faults in deep and even ultra-deep carbonate strata within the Tarim and Sichuan Basins, it has become increasingly clear that strike-slip faults are widely developed structures within the carbonate strata of these basins. They are complex three-dimensional geological bodies that play a role in controlling reservoirs, reservoirs, and hydrocarbon enrichment.

[0003] Previous studies have shown that multi-stage tectonic deformation activity of deep strike-slip faults plays a crucial role in controlling the development of fault-controlled reservoirs in carbonate rocks. Due to the relatively low activity intensity of these strike-slip faults (small to medium slip distances), a comprehensive and quantitative evaluation of their reservoir-controlling effect is one of the main technical challenges hindering efficient exploration of deep carbonate rocks. Quantitatively evaluating the development degree of fault-controlled reservoirs at different locations along deep strike-slip faults is essential for predicting hydrocarbon accumulation sites. Current technologies often struggle to characterize the internal structure of deep strike-slip faults in basins, and quantitatively evaluate the development degree of fault-controlled reservoirs across different strike-slip faults or even different locations along the same strike-slip fault. Summary of the Invention

[0004] The main objective of this invention is to provide a method, apparatus, storage medium, and computer equipment for quantitatively evaluating the reservoir-controlling effect of strike-slip fractures in carbonate rocks, so as to quantitatively evaluate the reservoir-controlling effect of strike-slip fractures in carbonate rocks.

[0005] Firstly, this application provides a quantitative evaluation method for the reservoir-controlling effect of carbonate strike-slip faults, comprising the following steps: analyzing three-dimensional seismic data of carbonate strike-slip faults and extracting coherence attribute maps of the strike-slip faults at deformation interfaces, wherein the deformation interfaces include the top reflection interface of the target carbonate layer; based on the three-dimensional seismic data and according to the coherence attribute maps of the strike-slip faults at the top reflection interface, determining the segmented structure of the strike-slip faults and constructing a segmented geological model of the strike-slip faults at the top reflection interface; based on the segmented geological model and according to the segmented structure of the strike-slip faults, performing finite element analysis on the elastic tensile strain of the strike-slip faults at the top reflection interface, and quantitatively determining the elastic tensile strain distribution of the strike-slip faults at the top reflection interface based on the analysis results; based on a preset relationship between the elastic tensile strain of carbonate strike-slip faults and single-well productivity, and according to the elastic tensile strain distribution of the strike-slip faults at the top reflection interface, quantitatively determining the single-well productivity of each part of the carbonate strike-slip fault.

[0006] In one embodiment, based on the three-dimensional seismic data and according to the coherence attribute map of the strike-slip fault at the top reflecting interface, a segmented geological model of the strike-slip fault at the top reflecting interface is constructed, including: based on the three-dimensional seismic data and according to the coherence attribute map of the strike-slip fault at the top reflecting interface, determining the vertical displacement of the strike-slip fault in multiple profiles perpendicular to its strike at the top reflecting interface; and constructing a segmented geological model of the strike-slip fault at the top reflecting interface based on the vertical displacement of the strike-slip fault in multiple profiles perpendicular to its strike at the top reflecting interface and in combination with the coherence attribute characteristics of the strike-slip fault.

[0007] In one embodiment, based on the segmented geological model and according to the segmented structure of the strike-slip fracture, a finite element analysis is performed on the elastic tensile strain of the strike-slip fracture at the top reflecting interface. The distribution of elastic tensile strain of the strike-slip fracture at the top reflecting interface is quantitatively determined based on the analysis results. This includes: constructing a finite element simulation geometric model of the strike-slip fracture based on the segmented geological model; determining the slip direction of the strike-slip fracture at the top reflecting interface based on the segmented structure of the strike-slip fracture; and performing stress simulation on the strike-slip fracture based on the finite element simulation geometric model and according to the segmented structure and slip direction of the strike-slip fracture, in order to quantitatively determine the distribution of elastic tensile strain of the strike-slip fracture at the top reflecting interface.

[0008] In one embodiment, the relationship between the elastic tensile strain of a carbonate strike-slip fracture and the single-well productivity is determined by the following steps: obtaining historical data on the elastic tensile strain distribution of the carbonate strike-slip fracture at the top reflection interface of the target carbonate layer and the single-well productivity at different locations of the carbonate strike-slip fracture; and determining the relationship between the elastic tensile strain of the carbonate strike-slip fracture and the single-well productivity based on the historical data using a logarithmic fitting method.

[0009] In one embodiment, the relationship between the elastic tensile strain of a strike-slip fracture in carbonate rock and the single-well productivity is determined using the following formula: y = alan(x) - b, where y represents the elastic tensile strain of the strike-slip fracture, x represents the single-well productivity, and a and b are fitting constants.

[0010] In one embodiment, the deformation interface further includes a layer with a beeline normal fault development over the target carbonate rock layer, the beeline normal fault development layer being located directly above the top reflection interface; after extracting the coherence attribute map of the strike-slip fault at the deformation interface, the method further includes the step of: based on the three-dimensional seismic data, according to the coherence attribute map of the beeline normal fault development layer over the target carbonate rock layer, determining the vertical displacement of the strike-slip fault in multiple profiles perpendicular to its strike in the beeline normal fault development layer over the target carbonate rock layer, and selecting the well with the largest vertical displacement on the strike-slip fault zone as the well with the largest future production capacity.

[0011] In one embodiment, the segmented structure includes segmented deployment steps and overlapping styles.

[0012] Secondly, this application provides a quantitative evaluation device for the reservoir-controlling effect of carbonate strike-slip faults, comprising: a data processing module for analyzing three-dimensional seismic data of carbonate strike-slip faults and extracting coherence attribute maps of the strike-slip faults at deformation interfaces, wherein the deformation interfaces include the top reflection interface of the target carbonate layer; a model construction module for determining the segmented structure of the strike-slip fault based on the three-dimensional seismic data and the coherence attribute maps of the strike-slip faults at the top reflection interface, and constructing a segmented geological model of the strike-slip faults at the top reflection interface; a finite element analysis module for performing finite element analysis on the elastic tensile strain of the strike-slip faults at the top reflection interface based on the segmented geological model and the segmented structure of the strike-slip faults, and quantitatively determining the elastic tensile strain distribution of the strike-slip faults at the top reflection interface based on the analysis results; and a production capacity calculation module for quantitatively determining the single-well production capacity of each part of the carbonate strike-slip fault based on the preset relationship between the elastic tensile strain of the carbonate strike-slip faults and the single-well production capacity, and based on the elastic tensile strain distribution of the strike-slip faults at the top reflection interface.

[0013] Thirdly, this application provides a storage medium storing a computer program, which, when executed by a processor, implements the steps of the quantitative evaluation method for the reservoir control effect of strike-slip faults in carbonate rocks as described above.

[0014] Fourthly, this application provides a computer device, including a processor and a storage medium storing program code, wherein when the program code is executed by the processor, it implements the steps of the quantitative evaluation method for the reservoir control effect of carbonate strike-slip faults as described above.

[0015] The method of this invention can not only analyze the internal segmentation and layering structure of deep carbonate strike-slip faults in detail based on three-dimensional seismic data, but also achieve a quantitative evaluation of the reservoir-controlling effect of carbonate strike-slip faults by performing stress simulation on the segmented structure of the strike-slip fault and quantitatively calculating the activity intensity of different segments in the later stages. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 This is a flowchart of a method for quantitatively evaluating the reservoir-controlling effect of strike-slip faults in carbonate rocks according to an exemplary embodiment of this application;

[0018] Figure 2 This is a flowchart of a method for quantitatively evaluating the reservoir-controlling effect of strike-slip faults in carbonate rocks according to a specific embodiment of this application;

[0019] Figure 3 According to a specific embodiment of this application, the Shunbei 1 strike-slip fault is located at the top reflection interface of the target carbonate layer and Coherence property diagram of the interface;

[0020] Figure 4 This is a schematic diagram of the segmentation and vertical displacement distribution of the Shunbei 1 strike-slip fault at the top reflection interface of the target carbonate layer according to a specific embodiment of this application.

[0021] Figure 5 This is a schematic diagram of the finite element simulation geometric model of the top reflection interface of the Shunbei 1 strike-slip fault in the target carbonate layer according to a specific embodiment of this application.

[0022] Figure 6 This is a schematic diagram of the local elastic strain distribution at the top reflection interface of the target carbonate rock layer of the Shunbei 1 strike-slip fault according to a specific embodiment of this application.

[0023] Figure 7 According to a specific embodiment of this application, the Shunbei 1 strike-slip fault in the target carbonate rock layer Overlay diagram of the en echelon normal fault at the interface and the strike-slip segment of the top reflecting interface;

[0024] Figure 8According to a specific embodiment of this application, the Shunbei 1 strike-slip fault in the target carbonate rock layer Distribution diagram of vertical fault displacement of the interfacial rift normal fault;

[0025] Figure 9 This is an overlay diagram of the well location distribution and elastic strain distribution on the Shunbei 1 strike-slip fault zone according to a specific embodiment of this application;

[0026] Figure 10 This is a diagram showing the relationship between single-well productivity and local elastic strain on the Shunbei 1 strike-slip fault zone according to a specific embodiment of this application;

[0027] Figure 11 This is a schematic diagram of the single-well productivity distribution from north to south on the Shunbei 1 strike-slip fault zone according to a specific embodiment of this application;

[0028] exist Figures 9 to 11 In the diagram, W1-W14 represent the well numbers. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] Example 1

[0031] This embodiment provides a quantitative evaluation method for the reservoir-controlling effect of strike-slip faults in carbonate rocks. Figure 1 This is a flowchart illustrating a method for quantitatively evaluating the reservoir-controlling effect of strike-slip faults in carbonate rocks according to an exemplary embodiment of this application. Figure 1 As shown, the method in this embodiment includes the following steps:

[0032] S100: Analyze the 3D seismic data of the strike-slip fault in carbonate rocks and extract the coherence attribute map of the strike-slip fault at the deformation interface, wherein the deformation interface includes the top reflection interface of the target carbonate rock layer (i.e., Interface) and the stratigraphic position of the en echelon normal fault developed over the target carbonate rock layer (i.e. interface).

[0033] S200: Based on the aforementioned 3D seismic data, and according to the coherence attribute map of the strike-slip fault at the top reflection interface, the segmented structure of the strike-slip fault is determined, and a segmented geological model of the strike-slip fault at the top reflection interface is constructed. The segmented structure includes segmented distribution steps and overlapping patterns.

[0034] Specifically, based on the three-dimensional seismic data and according to the coherence attribute map of the strike-slip fault at the top reflection interface, constructing a segmented geological model of the strike-slip fault at the top reflection interface may include: based on the three-dimensional seismic data and according to the coherence attribute map of the strike-slip fault at the top reflection interface, determining the vertical displacement of the strike-slip fault in multiple profiles perpendicular to its strike at the top reflection interface; and constructing a segmented geological model of the strike-slip fault at the top reflection interface based on the vertical displacement of the strike-slip fault in multiple profiles perpendicular to its strike at the top reflection interface, combined with the coherence attribute characteristics of the strike-slip fault.

[0035] S300: Based on the segmented geological model, according to the segmented structure of the strike-slip fault, the elastic tensile strain of the strike-slip fault in the top reflecting interface is analyzed by finite element method, and the distribution of elastic tensile strain of the strike-slip fault in the top reflecting interface is quantitatively determined according to the analysis results.

[0036] Specifically, based on the segmented geological model, and according to the segmented structure of the strike-slip fracture, finite element analysis is performed on the elastic tensile strain of the strike-slip fracture at the top reflecting interface. The distribution of elastic tensile strain of the strike-slip fracture at the top reflecting interface is quantitatively determined based on the analysis results. This can include: constructing a finite element simulation geometric model of the strike-slip fracture based on the segmented geological model; determining the slip direction of the strike-slip fracture at the top reflecting interface based on the segmented structure of the strike-slip fracture; and performing stress simulation on the strike-slip fracture based on the finite element simulation geometric model, according to the segmented structure and slip direction of the strike-slip fracture, to quantitatively determine the distribution of elastic tensile strain of the strike-slip fracture at the top reflecting interface.

[0037] S400: Based on the preset relationship between the elastic tensile strain of the carbonate rock strike-slip fracture and the single-well productivity, the single-well productivity of each part of the carbonate rock strike-slip fracture is quantitatively determined according to the elastic tensile strain distribution of the strike-slip fracture in the top reflection interface.

[0038] The relationship between the elastic tensile strain of carbonate strike-slip fractures and the single-well productivity is determined through the following steps: obtaining historical data on the elastic tensile strain distribution of carbonate strike-slip fractures at the top reflection interface of the target carbonate layer and the single-well productivity at different locations of the carbonate strike-slip fracture; and determining the relationship between the elastic tensile strain of carbonate strike-slip fractures and single-well productivity based on the historical data using a logarithmic fitting method.

[0039] Specifically, the relationship between the elastic tensile strain of the carbonate strike-slip fracture and the single-well productivity can be determined using the following formula: y = alan(x) - b, where y represents the elastic tensile strain of the carbonate strike-slip fracture, x represents the single-well productivity, and a and b are fitting constants.

[0040] In another example, the deformable interface also includes The interface, the The interface is located directly above the top reflective interface; after extracting the coherence property map of the strike-slip fault at the deformation interface, the method may further include the step of: based on the three-dimensional seismic data, according to the strike-slip fault at the... The coherence property graph of the interface determines the strike-slip fracture in the... The vertical displacement in multiple profiles perpendicular to the orientation of the interface is used to determine the single well with the largest vertical displacement on the strike-slip fault zone as the single well with the largest future production capacity.

[0041] Segmentation is a fundamental characteristic of strike-slip faults, prevalent in both basin-scale and outcrop-scale strike-slip faults. Under regional stress conditions, the segmented distribution and overlapping patterns of strike-slip faults are important factors influencing local stress field characteristics, largely determining the distribution and development scale of fracture-fracture zones within the strike-slip fault.

[0042] In the technical solution of this application, based on the quantitative and detailed analysis of the seismic and geological characteristics of strike-slip faults in the target carbonate rock layer, the segmentation of the main slip zone can be systematically determined. Based on this, a segmented geological model of the strike-slip fault is constructed. By conducting local stress field simulations of the strike-slip fault using the finite element method, the development characteristics and distribution range of the fracture-fracture system of the strike-slip fault are predicted, and the reservoir-controlling effect of the strike-slip fault is quantitatively evaluated. Rock fracture theory indicates that the overlying en echelon normal faults of the strike-slip fault zone can indicate the intensity of later activity of the fault zone. Therefore, by statistically analyzing the maximum vertical displacement of the overlying en echelon normal faults corresponding to the underlying steep strike-slip segments, the potential activity intensity of the strike-slip fault in the target carbonate rock layer can be quantitatively evaluated.

[0043] This technical solution is based on detailed seismic-geological analysis of deep carbonate strike-slip faults, defining the segmental structure of the strike-slip faults. Using this as a basis, stress simulations are performed on geological models of the carbonate strike-slip fault segments to quantitatively evaluate their reservoir-controlling effect. The kinematic characteristics of the strike-slip faults are then determined to ascertain the intensity of later-stage activity in different segments.

[0044] This technical solution overcomes the technical difficulty of quantitatively evaluating the reservoir development degree in different parts of strike-slip faults. It can be widely used to quantitatively evaluate the reservoir control effect of deep carbonate strike-slip faults, and is of great significance for studying the favorable reservoir development sites and oil and gas migration and accumulation in carbonate strike-slip fault systems.

[0045] Example 2

[0046] This embodiment presents a quantitative evaluation of the reservoir-controlling effect of the strike-slip fault in the Shunbei 1 fault (Shunbei three-dimensional overburden area) in the Shunbei area of ​​the Tarim Basin. Figure 2This is a flowchart of a method for quantitatively evaluating the reservoir-controlling effect of strike-slip faults in carbonate rocks according to a specific embodiment of this application.

[0047] (1) Conduct detailed seismic-geological analysis of strike-slip fault zones to determine their "longitudinal stratification and planar segmentation" characteristics, that is, to determine the development horizons of the underlying high and steep strike-slip segments and the overlying en echelon normal faults.

[0048] The 3D seismic data (Shunbei 3D) was analyzed to extract the coherence attribute map of the main active interface of the Shunbei 1 fault, thereby determining the underlying high-steep strike-slip segment of the strike-slip fault zone (i.e., Interface) and the developmental horizon of the overlying en echelon normal fault (i.e. Interface (e.g.) Figure 3 As shown in the figure, the planar section combined with the longitudinal section is used to clarify the longitudinal stratification characteristics of the Shunbei 1 fault.

[0049] (2) For strike-slip faults in the target carbonate rock layer, the vertical displacement changes (uplift or depression) along multiple profiles perpendicular to the strike are quantitatively statistically analyzed. Combined with the characteristics of fault coherence attributes, the segmented structure of the strike-slip fault is determined, namely the segmented distribution pattern and superimposed deformation pattern of the strike-slip fault, and a fine segmented geological model of the strike-slip fault is established. Subsequently, based on the segmented distribution pattern and superimposed deformation characteristics, the slip direction of the strike-slip fault in the target layer is determined.

[0050] like Figure 4 As shown, based on the statistical analysis of vertical fault displacement in closely spaced (500-meter intervals) profiles perpendicular to the strike of the Shunbei 1 fault, the variation in vertical fault displacement is determined, clarifying the influence of the Shunbei 1 fault on... The downward drop (negative vertical displacement) and upward bulge (positive vertical displacement) caused by interface deformation, combined with... The coherent characteristics of the interface can identify eight oblique segments. These segments are uniformly arranged on the left, and the overlapping areas all show segmentation, indicating that the Shunbei 1 fault is located in... The activity is on the left side of the interface.

[0051] (3) Based on the segmented structure of the strike-slip fracture determined in step (2), construct a segmented geometric model for finite element simulation of the strike-slip fracture (e.g., Figure 5 As shown), using a segmented structure (8 left-hand segments) and a slip direction (leftward) as boundary conditions, a strike-slip fracture stress simulation was conducted to quantitatively predict the stress-strain distribution characteristics of different parts of the segments (e.g., Figure 6 As shown in the figure, this allows for the prediction of the development range and density of fractured reservoirs, thus enabling a quantitative evaluation of the reservoir-controlling effect of strike-slip faults.

[0052] like Figure 5 As shown, the strike-slip fracture is divided into 8 segments (the numbers in the circles are the segment numbers), and the segments extend to the left. Figure 6 As shown, for Figure 5The geometric model shown in the image, combined with the left-lateral strike-slip characteristics of the Shunbei 1 fault obtained through detailed analysis, is used to simulate the elastic strain distribution characteristics by applying left-lateral strike-slip boundary conditions to the model. Figure 6 As can be seen, the elastic strain is concentrated at the segmented overlapping parts (e.g., between segment 1 and segment 2, and between segment 2 and segment 3) (black).

[0053] (4) Statistically determine the vertical fault displacement of the overlying en echelon normal fault corresponding to the underlying high and steep strike-slip segment in multiple profiles, determine the maximum vertical fault displacement, and quantitatively compare the relative activity intensity of the strike-slip segment of the target layer.

[0054] Shunbei 1 Fault The formation of interfacial en echelon normal faults is controlled by In the later stages of reactivation of strike-slip segments, the larger the maximum vertical displacement of the en echelon normal fault, the greater the intensity of later-stage activity in the underlying strike-slip segment. For example... Figure 7 and Figure 8 As shown, The distribution of the maximum vertical displacement of the five pairs of en echelon normal faults at the interface indicates that during the later stage of the Shunbei 1 fault (early Hercynian stage), the activity intensity of the northern segment was significantly stronger than that of the southern segment (the activity intensity of segments 1, 2, and 3 was greater than that of segments 5 and 6, with segment 1 having the greatest activity intensity in the later stage).

[0055] (5) Combining steps (3) and (4), comprehensively evaluate the reservoir control effect of different parts of the Shunbei 1 fault.

[0056] Combination Figure 9 and Figure 10 It can be seen that the single-well productivity (such as...) Figure 10 (as shown) and local elastic tensile strain (such as) Figure 9 As shown, there is a positive correlation between the degree of crack development and the [data]. Figure 10 The fitted relationship is: y = 0.0644ln(x) - 0.2819, where y represents elastic tensile strain, x represents single-well productivity, and R represents the correlation coefficient.

[0057] In addition, the vertical displacement distribution of en echelon normal faults ( Figure 8 This indicates that the activity intensity of the northern segment of the Shunbei 1 fault is significantly stronger than that of the southern segment, suggesting that the fractured reservoir generated by the strike-slip activity in the northern segment of the Shunbei 1 fault should also be larger than that in the southern segment. This characteristic is consistent with the decreasing trend of single-well productivity from north to south (e.g., Figure 11 (As shown)

[0058] By combining the simulated distribution of elastic tensile strain with single-well productivity, and comparing the location of maximum activity intensity indicated by the maximum vertical displacement of the Yanlie normal fault, the effectiveness of this technical method is demonstrated, and it can be used to quantitatively evaluate the reservoir control effect of strike-slip faults in carbonate rocks.

[0059] This technical solution overcomes the technical challenge of evaluating the reservoir development level at different locations along strike-slip faults. Based on the strike-slip fault segmentation theory, it conducts detailed seismic-geological analysis to determine the segmental structure and kinematic characteristics of strike-slip faults. Furthermore, it performs stress simulations on geological models of carbonate strike-slip fault segments and quantitatively calculates the later-stage activity intensity of different segments, thus quantitatively evaluating the reservoir-controlling effect of carbonate strike-slip faults. This method can be widely applied to quantitatively evaluate the reservoir-controlling effect of deep carbonate strike-slip faults in basins and is of great significance for studying favorable reservoir development locations and hydrocarbon migration and accumulation within carbonate strike-slip fault systems.

[0060] Example 3

[0061] This embodiment provides a quantitative evaluation device for reservoir control via strike-slip faults in carbonate rocks, comprising:

[0062] The data processing module is used to analyze the three-dimensional seismic data of the strike-slip fault of carbonate rock and extract the coherence attribute map of the strike-slip fault at the deformation interface, wherein the deformation interface includes the top reflection interface of the target layer of carbonate rock.

[0063] The model building module is used to determine the segmented structure of the strike-slip fault based on the three-dimensional seismic data and according to the coherence attribute map of the strike-slip fault at the top reflection interface, and to build a segmented geological model of the strike-slip fault at the top reflection interface.

[0064] The finite element analysis module is used to perform finite element analysis on the elastic tensile strain of the strike-slip fracture in the top reflection interface based on the segmented geological model and the segmented structure of the strike-slip fracture, and to quantitatively determine the elastic tensile strain distribution of the strike-slip fracture in the top reflection interface based on the analysis results.

[0065] The production capacity calculation module is used to quantitatively determine the production capacity of each part of the carbonate rock strike-slip fracture based on the relationship between the elastic tensile strain of the strike-slip fracture and the production capacity of a single well, according to the distribution of the elastic tensile strain of the strike-slip fracture in the top reflection interface.

[0066] In this embodiment, the quantitative evaluation device for the reservoir control effect of carbonate strike-slip fractures may further include a processor and a memory, wherein the processor is used to execute the following program modules stored in the memory: a data processing module, a model building module, a finite element analysis module, and a production capacity calculation module, so as to realize the quantitative evaluation of the reservoir control effect of carbonate strike-slip fractures.

[0067] Example 4

[0068] A storage medium storing a computer program, which, when executed by a processor, implements the steps of the quantitative evaluation method for reservoir control by strike-slip faults in carbonate rocks as described above:

[0069] A quantitative evaluation method for reservoir control by strike-slip faults in carbonate rocks includes the following steps: analyzing three-dimensional seismic data of the strike-slip faults in carbonate rocks and extracting coherence attribute maps of the strike-slip faults at deformation interfaces, wherein the deformation interfaces include the top reflection interface of the target carbonate rock layer; based on the three-dimensional seismic data and according to the coherence attribute maps of the strike-slip faults at the top reflection interface, determining the segmented structure of the strike-slip faults and constructing a segmented geological model of the strike-slip faults at the top reflection interface; based on the segmented geological model and according to the segmented structure of the strike-slip faults, performing finite element analysis on the elastic tensile strain of the strike-slip faults at the top reflection interface, and quantitatively determining the elastic tensile strain distribution of the strike-slip faults at the top reflection interface based on the analysis results; based on a preset relationship between the elastic tensile strain of the carbonate strike-slip faults and the single-well productivity, and according to the elastic tensile strain distribution of the strike-slip faults at the top reflection interface, quantitatively determining the single-well productivity of each part of the carbonate strike-slip fault.

[0070] In one embodiment, based on the three-dimensional seismic data and according to the coherence attribute map of the strike-slip fault at the top reflecting interface, a segmented geological model of the strike-slip fault at the top reflecting interface is constructed, including: based on the three-dimensional seismic data and according to the coherence attribute map of the strike-slip fault at the top reflecting interface, determining the vertical displacement of the strike-slip fault in multiple profiles perpendicular to its strike at the top reflecting interface; and constructing a segmented geological model of the strike-slip fault at the top reflecting interface based on the vertical displacement of the strike-slip fault in multiple profiles perpendicular to its strike at the top reflecting interface and in combination with the coherence attribute characteristics of the strike-slip fault.

[0071] In one embodiment, based on the segmented geological model and according to the segmented structure of the strike-slip fracture, a finite element analysis is performed on the elastic tensile strain of the strike-slip fracture at the top reflecting interface. The distribution of elastic tensile strain of the strike-slip fracture at the top reflecting interface is quantitatively determined based on the analysis results. This includes: constructing a finite element simulation geometric model of the strike-slip fracture based on the segmented geological model; determining the slip direction of the strike-slip fracture at the top reflecting interface based on the segmented structure of the strike-slip fracture; and performing stress simulation on the strike-slip fracture based on the finite element simulation geometric model and according to the segmented structure and slip direction of the strike-slip fracture, in order to quantitatively determine the distribution of elastic tensile strain of the strike-slip fracture at the top reflecting interface.

[0072] In one embodiment, the relationship between the elastic tensile strain of a carbonate strike-slip fracture and the single-well productivity is determined by the following steps: obtaining historical data on the elastic tensile strain distribution of the carbonate strike-slip fracture at the top reflection interface of the target carbonate layer and the single-well productivity at different locations of the carbonate strike-slip fracture; and determining the relationship between the elastic tensile strain of the carbonate strike-slip fracture and the single-well productivity based on the historical data using a logarithmic fitting method.

[0073] In one embodiment, the relationship between the elastic tensile strain of a strike-slip fracture in carbonate rock and the single-well productivity is determined using the following formula: y = alan(x) - b, where y represents the elastic tensile strain of the strike-slip fracture, x represents the single-well productivity, and a and b are fitting constants.

[0074] In one embodiment, the deformation interface further includes a layer with a beeline normal fault development over the target carbonate rock layer, the beeline normal fault development layer being located directly above the top reflection interface; after extracting the coherence attribute map of the strike-slip fault at the deformation interface, the method further includes the step of: based on the three-dimensional seismic data, according to the coherence attribute map of the beeline normal fault development layer over the target carbonate rock layer, determining the vertical displacement of the strike-slip fault in multiple profiles perpendicular to its strike in the beeline normal fault development layer over the target carbonate rock layer, and selecting the well with the largest vertical displacement on the strike-slip fault zone as the well with the largest future production capacity.

[0075] In one embodiment, the segmented structure includes segmented deployment steps and overlapping styles.

[0076] Those skilled in the art will understand that embodiments of the present invention can be provided as methods or computer program products. Therefore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0077] This invention is described with reference to flowchart illustrations of methods and computer program products according to embodiments of the invention. It should be understood that each step in the flowchart and combinations of steps in the flowchart can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing device, generate instructions for implementing the process. Figure 1 A device for a function specified in one or more processes.

[0078] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 The function specified in one or more processes.

[0079] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 Steps of a specified function in one or more processes.

[0080] The storage medium includes permanent and non-permanent, removable and non-removable media, and information storage can be achieved by any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data.

[0081] Storage media, including permanent and non-permanent, removable and non-removable media, can be used to store information by any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by computing devices.

[0082] Example 5

[0083] A computer device includes a processor and a storage medium storing program code, which, when executed by the processor, implements the steps of the quantitative evaluation method for reservoir control by strike-slip faults in carbonate rocks as described above:

[0084] A quantitative evaluation method for reservoir control by strike-slip faults in carbonate rocks includes the following steps: analyzing three-dimensional seismic data of the strike-slip faults in carbonate rocks and extracting coherence attribute maps of the strike-slip faults at deformation interfaces, wherein the deformation interfaces include the top reflection interface of the target carbonate rock layer; based on the three-dimensional seismic data and according to the coherence attribute maps of the strike-slip faults at the top reflection interface, determining the segmented structure of the strike-slip faults and constructing a segmented geological model of the strike-slip faults at the top reflection interface; based on the segmented geological model and according to the segmented structure of the strike-slip faults, performing finite element analysis on the elastic tensile strain of the strike-slip faults at the top reflection interface, and quantitatively determining the elastic tensile strain distribution of the strike-slip faults at the top reflection interface based on the analysis results; based on a preset relationship between the elastic tensile strain of the carbonate strike-slip faults and the single-well productivity, and according to the elastic tensile strain distribution of the strike-slip faults at the top reflection interface, quantitatively determining the single-well productivity of each part of the carbonate strike-slip fault.

[0085] In one embodiment, based on the three-dimensional seismic data and according to the coherence attribute map of the strike-slip fault at the top reflecting interface, a segmented geological model of the strike-slip fault at the top reflecting interface is constructed, including: based on the three-dimensional seismic data and according to the coherence attribute map of the strike-slip fault at the top reflecting interface, determining the vertical displacement of the strike-slip fault in multiple profiles perpendicular to its strike at the top reflecting interface; and constructing a segmented geological model of the strike-slip fault at the top reflecting interface based on the vertical displacement of the strike-slip fault in multiple profiles perpendicular to its strike at the top reflecting interface and in combination with the coherence attribute characteristics of the strike-slip fault.

[0086] In one embodiment, based on the segmented geological model and according to the segmented structure of the strike-slip fracture, a finite element analysis is performed on the elastic tensile strain of the strike-slip fracture at the top reflecting interface. The distribution of elastic tensile strain of the strike-slip fracture at the top reflecting interface is quantitatively determined based on the analysis results. This includes: constructing a finite element simulation geometric model of the strike-slip fracture based on the segmented geological model; determining the slip direction of the strike-slip fracture at the top reflecting interface based on the segmented structure of the strike-slip fracture; and performing stress simulation on the strike-slip fracture based on the finite element simulation geometric model and according to the segmented structure and slip direction of the strike-slip fracture, in order to quantitatively determine the distribution of elastic tensile strain of the strike-slip fracture at the top reflecting interface.

[0087] In one embodiment, the relationship between the elastic tensile strain of a carbonate strike-slip fracture and the single-well productivity is determined by the following steps: obtaining historical data on the elastic tensile strain distribution of the carbonate strike-slip fracture at the top reflection interface of the target carbonate layer and the single-well productivity at different locations of the carbonate strike-slip fracture; and determining the relationship between the elastic tensile strain of the carbonate strike-slip fracture and the single-well productivity based on the historical data using a logarithmic fitting method.

[0088] In one embodiment, the relationship between the elastic tensile strain of a strike-slip fracture in carbonate rock and the single-well productivity is determined using the following formula: y = alan(x) - b, where y represents the elastic tensile strain of the strike-slip fracture, x represents the single-well productivity, and a and b are fitting constants.

[0089] In one embodiment, the deformation interface further includes a layer with a beeline normal fault development over the target carbonate rock layer, the beeline normal fault development layer being located directly above the top reflection interface; after extracting the coherence attribute map of the strike-slip fault at the deformation interface, the method further includes the step of: based on the three-dimensional seismic data, according to the coherence attribute map of the beeline normal fault development layer over the target carbonate rock layer, determining the vertical displacement of the strike-slip fault in multiple profiles perpendicular to its strike in the beeline normal fault development layer over the target carbonate rock layer, and selecting the well with the largest vertical displacement on the strike-slip fault zone as the well with the largest future production capacity.

[0090] In one embodiment, the segmented structure includes segmented deployment steps and overlapping styles.

[0091] In one embodiment, a computer device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0092] Memory may include non-persistent storage in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash memory (flash FLASH RAM). Memory is an example of computer-readable media.

[0093] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this application. When the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0094] It should be noted that the terms "first," "second," etc., used in the specification, claims, and drawings of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in sequences other than those illustrated or described herein.

[0095] It should be understood that the exemplary embodiments described herein can be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. These embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art, and should not be construed as limiting the invention.

Claims

1. A quantitative evaluation method for reservoir control by strike-slip faults in carbonate rocks, characterized in that, Includes the following steps: The three-dimensional seismic data of the strike-slip fault of carbonate rock are analyzed to extract the coherence attribute map of the strike-slip fault at the deformation interface, wherein the deformation interface includes the top reflection interface of the target carbonate rock layer. Based on the aforementioned three-dimensional seismic data, and according to the coherence attribute map of the strike-slip fault at the top reflection interface, the segmented structure of the strike-slip fault is determined, and a segmented geological model of the strike-slip fault at the top reflection interface is constructed. Based on the segmented geological model, according to the segmented structure of the strike-slip fault, the elastic tensile strain of the strike-slip fault in the top reflecting interface is analyzed by finite element method, and the distribution of elastic tensile strain of the strike-slip fault in the top reflecting interface is quantitatively determined according to the analysis results. Based on the pre-defined relationship between the elastic tensile strain of the carbonate rock strike-slip fracture and the single-well productivity, the single-well productivity of each part of the carbonate rock strike-slip fracture is quantitatively determined according to the elastic tensile strain distribution of the strike-slip fracture in the top reflection interface. Based on the segmented geological model, and according to the segmented structure of the strike-slip fault, finite element analysis is performed on the elastic tensile strain of the strike-slip fault in the top reflecting interface. Based on the analysis results, the distribution of elastic tensile strain of the strike-slip fault in the top reflecting interface is quantitatively determined, including: Based on the segmented geological model, a finite element simulation geometric model of the strike-slip fault is constructed. Based on the segmented structure of the strike-slip fracture, the slip direction of the strike-slip fracture at the top reflective interface is determined; Based on the aforementioned finite element simulation geometric model, stress simulation is performed on the strike-slip fracture according to its segmented structure and slip direction, in order to quantitatively determine the elastic tensile strain distribution of the strike-slip fracture in the top reflecting interface.

2. The quantitative evaluation method according to claim 1, characterized in that, Based on the aforementioned 3D seismic data, and according to the coherence attribute map of the strike-slip fault at the top reflection interface, a segmented geological model of the strike-slip fault at the top reflection interface is constructed, including: Based on the aforementioned three-dimensional seismic data, and according to the coherence property map of the strike-slip fault at the top reflection interface, the vertical displacement of the strike-slip fault in multiple profiles perpendicular to its strike at the top reflection interface is determined. Based on the vertical displacement of the strike-slip fault in multiple profiles perpendicular to its strike at the top reflecting interface, and combined with the coherence properties of the strike-slip fault, a segmented geological model of the strike-slip fault at the top reflecting interface is constructed.

3. The quantitative evaluation method according to claim 1, characterized in that, The relationship between the elastic tensile strain of strike-slip fractures in carbonate rocks and the productivity of a single well is determined through the following steps: To obtain the elastic tensile strain distribution of the strike-slip fracture in the top reflection interface of the target carbonate layer and historical data on the single-well productivity of different parts of the strike-slip fracture. Based on the historical data, the relationship between the elastic tensile strain of carbonate strike-slip fractures and the single-well productivity was determined using a logarithmic fitting method.

4. The quantitative evaluation method according to claim 3, characterized in that, The relationship between the elastic tensile strain of strike-slip fractures in carbonate rocks and the productivity of a single well can be determined using the following formula: y = alan(x) - b Where y represents the elastic tensile strain of the strike-slip fracture, x represents the single-well productivity, and a and b are fitting constants.

5. The quantitative evaluation method according to claim 1, characterized in that, The deformation interface also includes the layer of en echelon normal fault development over the target carbonate rock layer, which is located directly above the top reflection interface. After extracting the coherent property map of the strike-slip fracture at the deformation interface, the method further includes the following steps: Based on the aforementioned 3D seismic data, and according to the coherence attribute map of the strike-slip fault over the target carbonate layer with en echelon normal fault development, the vertical displacement of the strike-slip fault in multiple profiles perpendicular to its strike in the target carbonate layer with en echelon normal fault development is determined. The single well with the largest vertical displacement in the strike-slip fault zone is selected as the single well with the largest future production capacity.

6. The quantitative evaluation method according to claim 1, characterized in that, The segmented structure includes segmented deployment steps and overlapping styles.

7. A quantitative evaluation device for reservoir control via strike-slip faults in carbonate rocks, characterized in that, include: The data processing module is used to analyze the three-dimensional seismic data of the strike-slip fault of carbonate rock and extract the coherence attribute map of the strike-slip fault at the deformation interface, wherein the deformation interface includes the top reflection interface of the target layer of carbonate rock. The model building module is used to determine the segmented structure of the strike-slip fault based on the three-dimensional seismic data and according to the coherence attribute map of the strike-slip fault at the top reflection interface, and to build a segmented geological model of the strike-slip fault at the top reflection interface. The finite element analysis module is used to perform finite element analysis on the elastic tensile strain of the strike-slip fracture in the top reflection interface based on the segmented geological model and the segmented structure of the strike-slip fracture, and to quantitatively determine the elastic tensile strain distribution of the strike-slip fracture in the top reflection interface based on the analysis results. The production capacity calculation module is used to quantitatively determine the production capacity of each part of the carbonate rock strike-slip fracture based on the relationship between the elastic tensile strain of the strike-slip fracture and the production capacity of a single well, according to the distribution of the elastic tensile strain of the strike-slip fracture in the top reflection interface. The finite element analysis module is also used for: Based on the segmented geological model, a finite element simulation geometric model of the strike-slip fault is constructed. Based on the segmented structure of the strike-slip fracture, the slip direction of the strike-slip fracture at the top reflective interface is determined; Based on the aforementioned finite element simulation geometric model, stress simulation is performed on the strike-slip fracture according to its segmented structure and slip direction, in order to quantitatively determine the elastic tensile strain distribution of the strike-slip fracture in the top reflecting interface.

8. A storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the quantitative evaluation method for the reservoir control effect of strike-slip faults in carbonate rocks as described in any one of claims 1 to 6.

9. A computer device comprising a processor and a storage medium storing program code, wherein when the program code is executed by the processor, it implements the steps of a method for quantitatively evaluating the reservoir control effect of strike-slip faults in carbonate rocks as described in any one of claims 1 to 6.

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