Method and device for determining displacement proportion of strike-slip-extension structure and electronic equipment

Abstract

The invention relates to the technical field of tectonic geology research, and discloses a strike-slip-extension tectonic displacement proportion determination method and device and electronic equipment. The method comprises the following steps: identifying a stretching fracture and a strike-slip fracture based on data; connecting fracture end points, and bending fracture line segments; counting the number e of stretching fractures and the number s of strike-slip fractures; calculating a quantity ratio x, wherein x = s / e; and according to a function analysis method and / or an interval judgment method, determining a strike-slip-extension displacement proportion n based on the x value. According to the technical scheme, the ratio of the strike-slip displacement to the extension displacement in the strike-slip-extension structure can be quantitatively analyzed by analyzing the corresponding relation between the number ratio of the strike-slip and the extension fractures in the same period of the area and the ratio interval of the strike-slip displacement to the extension displacement; according to the method, quantitative analysis can be accurately carried out on the ratio of the displacement amounts with different properties, so that a basis is provided for analyzing the displacement amounts with different properties of a complex structure belt and defining main control factors of regional deformation.

Description

Technical Field

[0001] The present invention relates to the technical field of structural geological research, and in particular to a method, device and electronic equipment for determining the displacement ratio of a strike-slip-extension structure, which are mainly used in a strike-slip-extension complex deformation zone. Background Art

[0002] The mode and process of regional tectonic response under complex tectonic background is one of the core scientific issues in structural geology research. Analysis of tectonic displacement is an important means to analyze regional stress environment and evaluate regional tectonic activity. At present, the basic methods for determining the tectonic evolution mode in a specific period in the region mainly include tectonic physical simulation and numerical simulation. The strike-slip displacement and extension displacement at the same time have a significant control effect on the fault combination pattern in the composite deformation zone. Most of the existing structural analysis methods focus on qualitative analysis, and it is difficult to conduct quantitative research on the tectonic displacement of the tectonic domain under the composite background of multiple stresses. At present, there are mainly three types of research on the displacement and displacement ratio under the control of different stress properties of strike-slip-extensional structures: the first method requires stereo interpretation and three-dimensional structural modeling based on three-dimensional data bodies in the early stage, and the strike-slip displacement is calculated using the marker layer (Jiang Youlu et al., 2017); the second method requires the restoration of profile balance through regional stress field simulation and structural physical simulation (Dong Dawei et al., 2021); the third method requires fault identification and stereoscopic characterization (Li Wei et al., 2017). In general, the above methods have certain difficulties in practical application: (1) 3D seismic interpretation requires less data base and takes a long time; (2) Structural physical simulation requires the refinement of basic geological models based on the original geological knowledge, and this process is highly subjective; (3) For strike-slip structures, numerical simulation related to strike-slip structures is still in its infancy and related methods still need to be improved.

[0003] Further searching yielded the following patent documents: A method for quantitatively characterizing fault strike-slip displacement under tension, document number CN106556869A; A method for quantitatively evaluating the activity of tension-torsion fault structures and a physical simulation device thereof, document number CN113390721B; A method for quantitatively characterizing the relationship between the strength ratio of fault extension and strike-slip stress, document number CN106842361A. The technologies involved in these patent documents more or less have the difficulties mentioned above.

[0004] In general, it is necessary to develop a technical solution that can conduct objective quantitative analysis of the strike-slip-extensional tectonic displacement ratio and is highly feasible. Summary of the invention

[0005] The present application provides a method, device and electronic equipment for determining the displacement ratio of a strike-slip-extension structure to solve the above-mentioned technical problems that the prior art is not feasible enough.

[0006] According to one aspect of the present application, an embodiment provides a method for determining the ratio of strike-slip to extensional structural displacement amounts, including:

[0007] Based on data capable of showing the planar fracture patterns and quantities in the application area, identify extensional fractures and strike-slip fractures;

[0008] Connect the fracture endpoints and segmentize the curved fracture lines; wherein, on the planar data, connect the two endpoints of an independent fracture that does not intersect or merge with other fractures, and the formed line segment represents the fracture;

[0009] Count the number e of extensional fractures and the number s of strike-slip fractures;

[0010] Calculate the quantity ratio x, x = s / e;

[0011] Based on the function analysis method and / or the interval judgment method, determine the strike-slip to extensional displacement amount ratio n based on the x value; wherein, the function analysis method includes one or more of the following situations:

[0012] If x ≤ 0.3, then n < 0.25, and the region is mainly dominated by extensional displacement;

[0013] If 0.3 < x ≤ 0.4, then 0.25 ≤ n ≤ 0.5;

[0014] If 0.4 < x ≤ 0.6, then n is 0.5;

[0015] If 0.6 < x ≤ 0.7, then 0.5 < n ≤ 1;

[0016] If 0.7 < x ≤ 0.8, then n is 1;

[0017] If 0.8 < x ≤ 0.9, then 1 < n ≤ 2;

[0018] If 0.9 < x ≤ 1.1, then n is 2;

[0019] If 1.1 < x ≤ 1.4, then 2 < n ≤ 3;

[0020] If 1.4 < x ≤ 1.6, then n is 3;

[0021] If 1.6 < x ≤ 2, then 3 < n ≤ 4;

[0022] If 2 < x ≤ 2.125, then n is 4;

[0023] If 2.125 < x, then n < 4, and the region is mainly dominated by pure strike-slip displacement;

[0024] The interval judgment method includes one or more of the following situations:

[0025] If x ≤ 0.3, the region is close to pure extensional deformation;

[0026] If 0.3 < x ≤ 0.95, n = 0.081e 3.3741x ;

[0027] If 0.95 < x ≤ 2.125, n = 2.6073ln(x) + 2.0202;

[0028] If 2.125 < x, the region is close to pure strike - slip deformation.

[0029] In one embodiment, the data capable of showing the planar fracture patterns and quantities in the application area includes one or more of seismic planar data, in - formation - coherent slices, surface aerial photographs, and tectonophysical simulation planar images.

[0030] In one embodiment, the identification of extensional fractures and strike - slip fractures includes:

[0031] Based on the regional stress - field data, clarify the main directions of the regional strike - slip stress and extensional stress;

[0032] Identify fractures with different activity natures, where extensional fractures are fractures whose strike is perpendicular to the direction of the regional extensional stress, and strike - slip fractures are fractures whose strike is obliquely intersecting at an acute angle with the direction of the regional strike - slip stress, and multiple fractures in the strike - slip fractures are arranged in an en echelon pattern.

[0033] In one embodiment, in the identification of extensional fractures and strike - slip fractures, if a fracture contains multiple curved segments arranged in an en echelon pattern, then this fracture is defined as a strike - slip fracture.

[0034] In one embodiment, at the same image resolution or seismic interpretation density, select the region with relatively dense fracture development for the statistics of e and s.

[0035] In one embodiment, the function analysis method includes one or more of the following situations:

[0036] If 0.3 < x ≤ 0.4, n takes 0.25;

[0037] If 0.6 < x ≤ 0.7, then n takes 0.75;

[0038] If 0.8 < x ≤ 0.9, then n takes 1.5;

[0039] If 1.1 < x ≤ 1.4, then n takes 2.5;

[0040] If 1.6 < x ≤ 2, then n takes 3.5.

[0041] According to one aspect of the present application, one embodiment provides a device for determining the ratio of strike - slip - extensional tectonic displacement amounts, including:

[0042] An identification module, configured to identify extensional faults and strike-slip faults based on data capable of showing the planar fracture patterns and quantities in the application area;

[0043] A simplification module, configured to connect the fracture endpoints and segmentize the curved fracture lines to simplify the fracture pattern; wherein, on the planar data, the two endpoints of an independent fracture that does not intersect or merge with other fractures are connected, and the connected line segment represents the fracture;

[0044] A statistics module, configured to count the quantity e of extensional faults and the quantity s of strike-slip faults;

[0045] A calculation module, configured to calculate the quantity ratio x, where x = s / e; and

[0046] A determination module, configured to determine the strike-slip - extension displacement ratio n based on the x value;

[0047] Wherein, the determination module includes a function analysis module and / or an interval judgment module; the function analysis module determines the strike-slip - extension displacement ratio n according to the function analysis method, and the function analysis method includes one or more of the following situations:

[0048] If x ≤ 0.3, then n < 0.25, and the area is mainly dominated by extensional displacement;

[0049] If 0.3 < x ≤ 0.4, then 0.25 ≤ n ≤ 0.5;

[0050] If 0.4 < x ≤ 0.6, then n is 0.5;

[0051] If 0.6 < x ≤ 0.7, then 0.5 < n ≤ 1;

[0052] If 0.7 < x ≤ 0.8, then n is 1;

[0053] If 0.8 < x ≤ 0.9, then 1 < n ≤ 2;

[0054] If 0.9 < x ≤ 1.1, then n is 2;

[0055] If 1.1 < x ≤ 1.4, then 2 < n ≤ 3;

[0056] If 1.4 < x ≤ 1.6, then n is 3;

[0057] If 1.6 < x ≤ 2, then 3 < n ≤ 4;

[0058] If 2 < x ≤ 2.125, then n is 4;

[0059] If 2.125 < x, then n < 4, and the area is mainly dominated by pure strike-slip displacement;

[0060] The interval judgment module determines the strike-slip - extension displacement ratio n according to the interval judgment method, and the interval judgment method includes one or more of the following situations:

[0061] If x ≤ 0.3, the area is close to pure extensional deformation;

[0062] If 0.3 < x ≤ 0.95, n = 0.081e 3.3741x ;

[0063] If 0.95 < x ≤ 2.125, n = 2.6073ln(x) + 2.0202;

[0064] If 2.125 < x, the area is close to pure strike-slip deformation.

[0065] In one embodiment, the recognition module includes:

[0066] A direction determination module for clarifying the main directions of the regional strike-slip stress and extensional stress based on the regional stress field data; and

[0067] A fracture form recognition module for recognizing fractures of different activity natures, wherein the extensional fracture is a fracture whose strike is perpendicular to the direction of the regional extensional stress, and the strike-slip fracture is a fracture whose strike is obliquely intersecting at an acute angle with the direction of the regional strike-slip stress, and multiple fractures in the strike-slip fractures are arranged in an en echelon pattern.

[0068] According to one aspect of the present application, an embodiment provides an electronic device, including:

[0069] A memory; and

[0070] A processor;

[0071] Wherein, the memory is used to store one or more computer instructions; the one or more computer instructions are executed by the processor to implement the strike-slip - extension tectonic displacement ratio determination method as described in any one of the above.

[0072] According to one aspect of the present application, an embodiment provides a readable storage medium, on which computer instructions are stored; wherein, when the computer instructions are executed by a processor, the strike-slip - extension tectonic displacement ratio determination method as described in any one of the above is implemented.

[0073] The technical solution of the above embodiment of the present application can quantitatively analyze the ratio of the strike-slip displacement amount to the extensional displacement amount of the strike-slip - extension structure by analyzing the corresponding relationship between the ratio of the number of contemporaneous strike-slip and extensional fractures in the area and the ratio interval of the strike-slip displacement amount to the extensional displacement amount; it can quantitatively analyze the ratio of different nature displacement amounts more accurately, thereby providing a basis for analyzing different nature displacement amounts in complex tectonic belts and clarifying the main controlling factors of regional deformation. Description of the Drawings

[0074] Figure 1 is a flow chart of a method for determining a displacement ratio of a strike-slip-extension structure in an embodiment;

[0075] Figure 2 is a flow chart of a method for determining a displacement ratio of a strike-slip-extension structure in an embodiment;

[0076] Figure 3 is a physical simulation experiment of strike-slip-extension structure in an embodiment;

[0077] Figure 4 is a simplified diagram of the experimental plane photo in an embodiment (the experimental plane diagram is cited from Chen Junpeng et al., 2019, according to the method for judging the nature of the fault; black is considered to be a normal fault and dark gray is a strike-slip fault);

[0078] Figure 5 is a comparison diagram of the similarity between the xn projection points actually measured and the fitting curve at a fixed displacement ratio in an embodiment;

[0079] Figure 6 The present invention is a schematic diagram of the structure of a device for determining the displacement ratio of a strike-slip-extension structure in an embodiment. DETAILED DESCRIPTION

[0080] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0081] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0082] It should be noted that the terms "first", "second" etc. in the present application are used to distinguish similar objects, and need not be used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged in appropriate circumstances, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, the process, method, system, product or equipment comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0083] It should be understood that when an element (such as a layer, film, region, or substrate) is described as being "on" another element, the element can be directly on the other element, or there can also be intermediate elements. Moreover, in this application, when an element is described as being "connected" to another element, the element can be "directly connected" to the other element, or "connected" to the other element through a third element.

[0084] Embodiment 1

[0085] Please refer to Figure 1 , an embodiment provides a method for determining the ratio of strike-slip to extensional tectonic displacement, including the following steps:

[0086] S1. Based on the data that can show the planar fracture pattern and quantity in the application area, identify extensional fractures and strike-slip fractures. Generally, the above data includes one or more of seismic planar data, formation coherence slices along the strata, surface aerial photographs, and planar images of tectonic physical simulations.

[0087] Regarding the identification of fractures, the available scheme is: first, based on the regional stress field data, clarify the main directions of regional strike-slip stress and extensional stress; then identify fractures with different activity natures. Among them, extensional fractures are fractures whose strike is perpendicular to the direction of regional extensional stress, and strike-slip fractures are fractures whose strike is obliquely intersecting at an acute angle with the direction of regional strike-slip stress, and multiple fractures in strike-slip fractures are arranged in an en echelon pattern. Usually, if a fracture contains multiple en echelon curved segments, this fracture is defined as a strike-slip fracture.

[0088] S2. Connect the fracture endpoints and segmentize the curved fracture lines to simplify the fracture pattern; among them, on the planar data, connect the two endpoints of an independent fracture that does not intersect or merge with other fractures, and the formed line segment represents the fracture.

[0089] S3. Count the number e of extensional fractures and the number s of strike-slip fractures. Preferably, under the same image resolution or seismic interpretation density, select the area with relatively dense fracture development for the statistics of e and s.

[0090] S4. Calculate the quantity ratio x, x = s / e;

[0091] S5. Based on the function analysis method and / or interval judgment method, determine the strike-slip to extensional displacement ratio n based on the x value; among them, the function analysis method includes one or more of the following situations:

[0092] If x ≤ 0.3, then n < 0.25, and the area is mainly dominated by extensional displacement;

[0093] If 0.3 < x ≤ 0.4, then 0.25 ≤ n ≤ 0.5, preferably n takes 0.25;

[0094] If 0.4 < x ≤ 0.6, then n is 0.5;

[0095] If 0.6 < x ≤ 0.7, then 0.5 < n ≤ 1, preferably n is taken as 0.75;

[0096] If 0.7 < x ≤ 0.8, then n is 1;

[0097] If 0.8 < x ≤ 0.9, then 1 < n ≤ 2, preferably n is taken as 1.5;

[0098] If 0.9 < x ≤ 1.1, then n is 2;

[0099] If 1.1 < x ≤ 1.4, then 2 < n ≤ 3, preferably n is taken as 2.5;

[0100] If 1.4 < x ≤ 1.6, then n is 3;

[0101] If 1.6 < x ≤ 2, then 3 < n ≤ 4, preferably n is taken as 3.5;

[0102] If 2 < x ≤ 2.125, then n is 4;

[0103] If 2.125 < x, then n < 4, and the region is mainly characterized by pure strike - slip displacement;

[0104] The interval judgment method described above includes one or more of the following situations:

[0105] If x ≤ 0.3, the region is close to pure extensional deformation;

[0106] If 0.3 < x ≤ 0.95, n = 0.081e 3.3741x ;

[0107] If 0.95 < x ≤ 2.125, n = 2.6073ln(x) + 2.0202;

[0108] If 2.125 < x, the region is close to pure strike - slip deformation.

[0109] The method for determining the ratio of strike - slip to extensional tectonic displacement in this application aims at the problem in the prior art of lacking quantitative judgment on the ratio of strike - slip and extensional active displacement in the strike - slip - extensional composite deformation zone. Based on the fracture property analysis and the statistical count of planar fractures, the analysis of the ratio of regional strike - slip to extensional displacement is carried out on this basis, so as to promote the research on the tectonic deformation characteristics of the strike - slip - extensional deformation zone and provide support for the structural geological understanding of oil and gas exploration in the strike - slip tectonic domain.

[0110] Example 2

[0111] Please refer to Figure 2 、 Figure 3, An embodiment provides a method for determining the ratio of strike-slip to extensional tectonic displacement. The following will elaborate on the technical solution of the present invention from the perspective of the inventor, facilitating those skilled in the art to familiarize themselves with the idea of the present invention. Among them, for some technical key points, detailed explanations are provided in order to enable those skilled in the art to comprehensively understand the technical solution of the present invention.

[0112] The method for determining the ratio of strike-slip to extensional tectonic displacement includes the following steps:

[0113] (1) Identify faults with different activity natures. Collect regional stress field data to clarify the main directions of regional strike-slip stress and extensional stress. According to the regional stress field data, identify faults with strikes perpendicular to the regional extensional stress direction as extensional faults, and identify faults with strikes obliquely intersecting the regional strike-slip direction at an acute angle and arranged in an en echelon pattern as strike-slip faults. Among them, if a fault contains multiple en echelon curved segments, this fault is considered a strike-slip fault.

[0114] (2) Simplify the fault morphology. On the planar data, connect the two endpoints of independent faults that do not intersect or merge with other faults. The formed straight line represents the fault.

[0115] (3) Count the number of extensional faults and strike-slip faults, denoted as e and s respectively.

[0116] (4) Calculate the quantity ratio x. Divide the number of strike-slip faults (s) by the number of extensional faults (e) to obtain the fault quantity ratio (x). Generally, x is approximated to two decimal places.

[0117] (5) Provide two methods for judging the value of n based on the value of x, which can be selected and used according to the actual situation, or used simultaneously for comparative analysis.

[0118] One is the interval judgment method: According to Table 1, determine the reference value and determined value of the strike-slip to extensional displacement ratio n. Specifically:

[0119] If x ≤ 0.3, it is inferred that n < 0.25, and the region is mainly characterized by extensional displacement with almost no strike-slip displacement component;

[0120] If 0.3 < x ≤ 0.4, then 0.25 ≤ n ≤ 0.5, and it is recommended that n can take the reference value of 0.25;

[0121] If 0.4 < x ≤ 0.6, then it is considered that n can be determined as 0.5;

[0122] If 0.6 < x ≤ 0.7, then 0.5 < n ≤ 1, and it is recommended that n can take the reference value of 0.75;

[0123] If 0.7 < x ≤ 0.8, then it is considered that n can be determined as 1;

[0124] If 0.8 < x ≤ 0.9, then 1 < n ≤ 2, and the recommended reference value for n is 1.5;

[0125] If 0.9 < x ≤ 1.1, then n is considered to be determined as 2;

[0126] If 1.1 < x ≤ 1.4, 2 < n ≤ 3, and the recommended reference value for n is 2.5;

[0127] If 1.4 < x ≤ 1.6, then n is considered to be determined as 3;

[0128] If 1.6 < x ≤ 2, 3 < n ≤ 4, and the recommended reference value for n is 3.5;

[0129] If 2 < x ≤ 2.125, then n is considered to be determined as 4;

[0130] When 2.125 < x, then n < 4, and the region is mainly dominated by pure strike - slip displacement, with basically no extensional displacement component.

[0131] Table 1 Comparison table of x range and n range

[0132]

[0133] The second is the function analysis method: taking x as the independent variable and n as the dependent variable, calculating the value of n through a piece - wise function. Specifically:

[0134] When x ≤ 0.3, the region is close to pure extensional deformation;

[0135] When 0.3 < x ≤ 0.95, n is calculated by formula 1:

[0136] n = 0.081e 3.3741x —— Formula 1

[0137] When 0.95 < x ≤ 2.125, n is calculated by formula 2:

[0138] n = 2.6073ln(x) + 2.0202 —— Formula 2

[0139] When 2.125 < x, the region is close to pure strike - slip deformation.

[0140] The above - mentioned technical solution is based on the understanding of a large number of geological research results of predecessors on strike - slip faults, and at the same time summarizes the results of the strike - slip - extension tectonic physical simulation experiments carried out in the process of its own research ( Figure 3) proposed this method. Among them, the basic data mainly required for this application are seismic plane data, coherent slices along the strata, surface aerial photos, structural physical simulation plane images and other data that can show the morphology and number of plane faults in the application area. The strike-slip-extension structural displacement ratio determination method of this application mainly conducts statistical analysis on the number of faults of two natures, strike-slip and extension, formed in the same period in the plane data. Under the same image resolution or seismic interpretation density, it is advisable to select areas with relatively dense fault development for statistics. Through this method, the quantitative proportional relationship between the strike-slip displacement and the extension displacement in the same period in the region can be judged based on the results of plane fault interpretation, which provides a basis for more accurately describing the strike-slip-extension process in the region and clarifying the main deformation mode in the region.

[0141] Embodiment 3

[0142] Please refer to Figure 4 , Figure 5 An embodiment provides a method for determining the displacement ratio of a strike-slip-extension structure, which is explained below through a case to facilitate further understanding of its technical solution.

[0143] For the experimental simulation plane image data with different strike-slip-extension displacement ratios formed in the same period in the tectonic physical simulation experiment, the statistics of faults with different properties were carried out (Chen Xingpeng, Li Wei, Wu Zhiping, Xu Changgui, Ren Jian. Physical simulation of tectonic deformation under the combined action of "extension-strike-slip" [J]. Geotectonics and Mineralization, 2019, 43(06): 1106-1116.), and the strike-slip-extension displacement ratio actually set in the experiment was compared.

[0144] The specific steps are as follows:

[0145] (1) The plane images studied have marked faults of different natures, including strike-slip faults and extensional faults ( Figure 4 ).

[0146] (2) According to step (2), the fracture morphology is simplified, and the two end points of the independent fracture that does not intersect or merge with other fractures are connected, and the straight line formed by the connection represents the fracture.

[0147] (3) According to step (3), count the number of extensional faults and strike-slip faults, denoted as e and s, respectively.

[0148] (4) Calculate the number ratio x according to step (4). Divide the number of strike-slip faults (s) by the number of extension faults (e) to obtain the fault number ratio (x), as shown in Table 2.

[0149] Table 2 Statistics of fracture numbers and ratio calculations of different properties

[0150]

[0151]

[0152] (5) According to step (4) and Table 1, select method 1, put x into the corresponding interval, and determine the range of n values. The results show that the range of n values ​​is consistent with the ratio of strike-slip and extension displacements set in the structural physical simulation experiment, as shown in Table 3. The mean value of the ratio of the number of faults in the three stages in each group of experiments is used as the horizontal coordinate of the point, and the displacement ratio n is used as the vertical coordinate. The data points formed are highly similar to the fitting curve given in method 2, as shown in Figure 5 shown.

[0153] Table 3 Ratio of n value range inferred from x to actual strike-slip-extension displacement

[0154]

[0155] This example proves the effectiveness of the method for determining the ratio of strike-slip and extensional structural displacements. With the continuous development of regional structures, the number of strike-slip faults and extensional faults continues to increase, and the ratio of the number of faults tends to be stable, indicating the proportional relationship between the displacements of different properties in the region.

[0156] Embodiment 4

[0157] The quantitative analysis of displacements of different natures in the strike-slip-extensional tectonic belt under complex tectonic background is an important structural geological problem that has not been well solved for a long time. Figure 6 An embodiment provides a device for determining the displacement ratio of a strike-slip-extension structure, which has the following structural form:

[0158] (1) Identification module 10

[0159] The identification module 10 is used to identify extensional faults and strike-slip faults based on data that can show the morphology and quantity of planar faults in the application area;

[0160] (2) Simplified module 20

[0161] The simplification module 20 is used to connect the fracture endpoints and bend the fracture into segments to simplify the fracture shape; wherein, on the plane data, two endpoints of an independent fracture that does not intersect or merge with other fractures are connected, and the line segment formed by the connection represents the fracture;

[0162] (3) Statistics module 30

[0163] The statistical module 30 is used to count the number of extension faults e and the number of strike-slip faults s;

[0164] (4) Computing module 40

[0165] The calculation module 40 is used to calculate the quantity ratio x, where x = s / e;

[0166] (5) The determination module 50

[0167] The determination module 50 is used to determine the strike-slip - extension displacement ratio n based on the value of x; wherein, the determination module includes a function analysis module and / or an interval judgment module; the function analysis module determines the strike-slip - extension displacement ratio n according to the function analysis method, and the function analysis method includes one or more of the following situations:

[0168] If x ≤ 0.3, then n < 0.25, and the area is mainly dominated by extension displacement;

[0169] If 0.3 < x ≤ 0.4, then 0.25 ≤ n ≤ 0.5;

[0170] If 0.4 < x ≤ 0.6, then n is 0.5;

[0171] If 0.6 < x ≤ 0.7, then 0.5 < n ≤ 1;

[0172] If 0.7 < x ≤ 0.8, then n is 1;

[0173] If 0.8 < x ≤ 0.9, then 1 < n ≤ 2;

[0174] If 0.9 < x ≤ 1.1, then n is 2;

[0175] If 1.1 < x ≤ 1.4, then 2 < n ≤ 3;

[0176] If 1.4 < x ≤ 1.6, then n is 3;

[0177] If 1.6 < x ≤ 2, then 3 < n ≤ 4;

[0178] If 2 < x ≤ 2.125, then n is 4;

[0179] If 2.125 < x, then n < 4, and the area is mainly dominated by pure strike-slip displacement;

[0180] The interval judgment module determines the strike-slip - extension displacement ratio n according to the interval judgment method, and the interval judgment method includes one or more of the following situations:

[0181] If x ≤ 0.3, the area is close to pure extension deformation;

[0182] If 0.3 < x ≤ 0.95, n = 0.081e 3.3741x ;

[0183] If 0.95 < x ≤ 2.125, n = 2.6073ln(x) + 2.0202;

[0184] If 2.125 < x, the region is close to pure strike-slip deformation.

[0185] In one embodiment, the recognition module 10 includes: a direction determination module and a fracture form recognition module; wherein, the direction determination module is configured to determine the main directions of the strike-slip stress and the extensional stress in the region based on the regional stress field data; the fracture form recognition module is configured to identify fractures with different activity natures, wherein, the extensional fracture is a fracture whose strike is perpendicular to the direction of the regional extensional stress, the strike-slip fracture is a fracture whose strike is obliquely intersecting at an acute angle with the direction of the regional strike-slip stress, and multiple fractures in the strike-slip fractures are arranged in an en echelon pattern.

[0186] It should be noted that the above-mentioned strike-slip - extensional tectonic displacement ratio determination device is used to implement the strike-slip - extensional tectonic displacement ratio determination method in each of the above embodiments, and each module in the device corresponds to each step in the method.

[0187] Embodiment Five

[0188] Based on the same inventive concept, an embodiment of the present application provides an electronic device, including: a memory and a processor; wherein, the memory is used to store one or more computer instructions; the one or more computer instructions are executed by the processor to perform the strike-slip - extensional tectonic displacement ratio determination method according to any one of the above embodiments.

[0189] Embodiment Six

[0190] Based on the same inventive concept, an embodiment of the present application provides a readable storage medium, on which computer instructions are stored; wherein, when the computer instructions are executed by a processor, the strike-slip - extensional tectonic displacement ratio determination method according to any one of the above embodiments is implemented.

[0191] Wherein, the above-mentioned one or more computer instructions can form a program.

[0192] The above program can be run in the processor, or it can be stored in the memory (or computer-readable medium), which includes permanent and non-permanent, removable and non-removable media. Information storage can be achieved by any method or technology. Information can be computer-readable instructions, data structures, program modules or other data. Examples of computer 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 technology, read-only compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined in this article, computer-readable media does not include temporary computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0193] These computer programs can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps of the functions specified in one or more blocks can be implemented by different modules corresponding to different steps.

[0194] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for determining the displacement ratio of a strike-slip-extension structure, characterized in that: Including: Based on data capable of showing the planar fracture patterns and quantities in the application area, identifying extensional fractures and strike-slip fractures; Connecting the fracture endpoints and segmenting the curved fracture lines; wherein, on the planar data, connect the two endpoints of an independent fracture that does not intersect or merge with other fractures, and the formed line segment represents the fracture; Counting the number e of extensional fractures and the number s of strike-slip fractures; Calculating the quantity ratio x, where x = s / e; Based on the function analysis method and / or the interval judgment method, determining the strike-slip - extensional displacement ratio n based on the x value; wherein, the function analysis method includes one or more of the following situations: If x ≤ 0.3, then n < 0.25, and the area is mainly dominated by extensional displacement; If 0.3 < x ≤ 0.4, then 0.25 ≤ n ≤ 0.5; If 0.4 < x ≤ 0.6, then n is 0.5; If 0.6 < x ≤ 0.7, then 0.5 < n ≤ 1; If 0.7 < x ≤ 0.8, then n is 1; If 0.8 < x ≤ 0.9, then 1 < n ≤ 2; If 0.9 < x ≤ 1.1, then n is 2; If 1.1 < x ≤ 1.4, then 2 < n ≤ 3; If 1.4 < x ≤ 1.6, then n is 3; If 1.6 < x ≤ 2, then 3 < n ≤ 4; If 2 < x ≤ 2.125, then n is 4; If 2.125 < x, then n < 4, and the area is mainly dominated by pure strike-slip displacement; The interval judgment method includes one or more of the following situations: If x ≤ 0.3, the area is close to pure extensional deformation; If 0.3 <x≤0.95,n=0.081e 3.3741x ; If 0.95 < x ≤ 2.125, n = 2.6073ln(x) + 2.0202; If 2.125 < x, the area is close to pure strike-slip deformation.

2. The method for determining the displacement ratio of strike-slip-extension structure according to claim 1, characterized in that: The data capable of showing the planar fracture patterns and quantities in the application area includes one or more of seismic planar data, formation coherence slices, surface aerial photographs, and tectonic physical simulation planar images.

3. The method for determining the displacement ratio of a strike-slip-extension structure according to claim 1, characterized in that: The identification of extensional fractures and strike-slip fractures includes: Based on the regional stress field data, clarifying the main directions of regional strike-slip stress and extensional stress; Identifying fractures with different activity natures, wherein, an extensional fracture is a fracture whose strike is perpendicular to the direction of regional extensional stress, and a strike-slip fracture is a fracture whose strike is obliquely intersecting at an acute angle with the direction of regional strike-slip stress, and multiple fractures in the strike-slip fractures are arranged in an en echelon pattern.

4. The method for determining the displacement ratio of strike-slip-extension structure according to claim 3, characterized in that: In the identification of extensional fractures and strike-slip fractures, if a fracture contains multiple curved segments arranged in an en echelon pattern, then this fracture is defined as a strike-slip fracture.

5. The method for determining the displacement ratio of strike-slip-extension structure according to claim 1, characterized in that: Under the same image resolution or seismic interpretation density, select the area with relatively dense fracture development for the statistics of e and s.

6. The method for determining the displacement ratio of strike-slip-extension structure according to claim 1, characterized in that: The function analysis method includes one or more of the following situations: If 0.3 < x ≤ 0.4, n takes 0.25; If 0.6 < x ≤ 0.7, then n takes 0.75; If 0.8 < x ≤ 0.9, then n takes 1.5; If 1.1 < x ≤ 1.4, then n takes 2.5; If 1.6 < x ≤ 2, then n takes 3.

5.

7. A device for determining the displacement ratio of a strike-slip-extension structure, characterized in that: Including: An identification module for identifying extensional fractures and strike-slip fractures based on data capable of showing the planar fracture patterns and quantities in the application area; A simplification module, which is used to connect the broken endpoints, bend and segment the broken line segments to simplify the fracture pattern. Among them, on the planar data, the two endpoints of the independent fracture that does not intersect or merge with other fractures are connected, and the connected line segment represents the fracture. A statistical module, which is used to count the number e of extensional fractures and the number s of strike-slip fractures. A calculation module, which is used to calculate the quantity ratio x, where x = s / e; and A determination module, which is used to determine the strike-slip - extensional displacement ratio n based on the value of x. Among them, the determination module includes a function analysis module and / or an interval judgment module; the function analysis module determines the strike-slip - extensional displacement ratio n according to the function analysis method, and the function analysis method includes one or more of the following situations: If x ≤ 0.3, then n < 0.25, and the region is mainly dominated by extensional displacement. If 0.3 < x ≤ 0.4, then 0.25 ≤ n ≤ 0.

5. If 0.4 < x ≤ 0.6, then n is 0.

5. If 0.6 < x ≤ 0.7, then 0.5 < n ≤ 1. If 0.7 < x ≤ 0.8, then n is 1. If 0.8 < x ≤ 0.9, then 1 < n ≤ 2. If 0.9 < x ≤ 1.1, then n is 2. If 1.1 < x ≤ 1.4, then 2 < n ≤ 3. If 1.4 < x ≤ 1.6, then n is 3. If 1.6 < x ≤ 2, then 3 < n ≤ 4. If 2 < x ≤ 2.125, then n is 4. If 2.125 < x, then n < 4, and the region is mainly dominated by pure strike-slip displacement. The interval judgment module determines the strike-slip - extensional displacement ratio n according to the interval judgment method, and the interval judgment method includes one or more of the following situations: If x ≤ 0.3, the region is close to pure extensional deformation. If 0.3 <x≤0.95,n=0.081e 3.3741x ; If 0.95 < x ≤ 2.125, n = 2.6073ln(x) + 2.0202. If 2.125 < x, the region is close to pure strike-slip deformation.

8. The device for determining the displacement ratio of a strike-slip-extension structure according to claim 1, characterized in that: The recognition module includes: A direction determination module, which is used to clarify the main directions of the strike-slip stress and extensional stress in the region based on the regional stress field data; and A fracture form recognition module, which is used to recognize fractures with different activity properties. Among them, the extensional fracture is a fracture whose strike is perpendicular to the regional extensional stress direction, and the strike-slip fracture is a fracture whose strike is obliquely intersecting at an acute angle with the regional strike-slip stress direction, and multiple fractures in the strike-slip fractures are arranged in an en echelon pattern.

9. An electronic device, characterized in that: Including: A memory; And A processor; Among them, the memory is used to store one or more computer instructions; the one or more computer instructions are executed by the processor to implement the method for determining the strike-slip - extensional tectonic displacement ratio according to any one of claims 1 to 6.

10. A readable storage medium, characterized in that: Computer instructions are stored on the readable storage medium; among them, when the computer instructions are executed by the processor, the method for determining the strike-slip - extensional tectonic displacement ratio according to any one of claims 1 to 6 is implemented.

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