CN-121980724-A - Structural deformation strength evaluation method, electronic equipment, storage medium and device

CN121980724ACN 121980724 ACN121980724 ACN 121980724ACN-121980724-A

Abstract

The invention discloses a structural deformation strength evaluation method, electronic equipment, a storage medium and a device. The method comprises the steps of calculating stratum curvature of a target layer based on seismic data and carrying out normalization processing, establishing a structural deformation strength standard value system based on the stratum curvature, obtaining each structural element index of the target layer based on the seismic data and carrying out normalization processing, carrying out two-dimensional matching on each structural element index and the structural deformation strength standard value system, obtaining values of the structural element indexes corresponding to each standard value, further carrying out correlation analysis on the stratum curvature and each structural element index, carrying out weight assignment on each structural element index, and carrying out structural deformation strength evaluation on a target area based on each structural element index and the corresponding weight. The invention can evaluate the structural deformation strength by only relying on a small amount of seismic data, and provides a reliable theoretical basis for optimizing the favorable region of basin oil gas storage.

Inventors

WEI ZHIHONG
FAN RUI
LIU ZHONGRONG
FAN ZHIWEI
HE ZHIYONG
HAN JING
WU HAO
HE HONGBING

Assignees

中国石油化工股份有限公司
中国石油化工股份有限公司勘探分公司

Dates

Publication Date: 20260505
Application Date: 20241030

Claims (10)

1. The method for evaluating the structural deformation strength is characterized by comprising the following steps: acquiring a structural skeleton cross-section of a target area; Calculating the stratum curvature of the target layer based on the structural skeleton profile, and carrying out normalization processing on the stratum curvature; establishing a construction deformation strength standard value system based on the stratum curvature after the normalization processing is completed; Acquiring each structural element index of a target layer based on a geological map of a target area, and carrying out normalization processing on each structural element index; Two-dimensional matching is carried out on the structural element indexes subjected to normalization processing and the structural deformation strength standard value system, and the values of the structural element indexes corresponding to the standard values are obtained; performing correlation analysis on the stratum curvature and the construction element indexes based on the standard values and the corresponding construction element indexes, and further performing weight assignment on the construction element indexes; And evaluating the structural deformation strength of the target area based on the structural element indexes and the corresponding weights thereof.
2. The method of evaluating structural deformation according to claim 1, wherein calculating the formation curvature of the target layer based on the structural skeleton cross-sectional view comprises: Establishing a coordinate system in the structural skeleton section based on the deepest part of the target layer, setting sampling points along the target layer at set intervals, and additionally setting the sampling points at fault and fold development positions; And calculating the stratum curvature by taking the set number of sampling points as calculation gradients.
3. The method for evaluating the strength of structural deformation according to claim 2, wherein the calculation expression of the formation curvature is: Z 2 is the root mean square of the gradient, the curvature of the stratum is represented, x i and y i are the x coordinate and y coordinate of the ith sampling point on the contour line of the fault plane of the target layer respectively, and M is the number of the sampling points.
4. The method for evaluating structural deformation according to claim 3, wherein the calculation expression for normalizing the curvature of the stratum is: Wherein mu is a stratum deformation index and represents the deformation strength degree of the structure, Z 2max is the gradient root mean square maximum value of the target layer, Z 2min is the gradient root mean square minimum value of the target layer, and Z 2max is dimensionless.
5. The method according to claim 1, wherein the obtaining each structural element index of the target layer based on the geological map of the target region, and normalizing each structural element index comprises: The normalization processing result is that the stratum burial index of the burial area is=1, the stratum burial index of the exposed area is=0.5, the stratum burial index of the denuded area is=0, and the stratum burial index of the magma metamorphic rock is=0; for the stratum inclination index, calculating stratum inclination distribution of the target layer based on the stratum actually measured inclination angle, wherein the normalization processing result is that the stratum inclination index of the stratum inclination angle of 0 degree is=1, and the stratum inclination index of the stratum inclination angle of 90 degrees is=0, so that the stratum inclination indexes corresponding to the stratum inclination angles are obtained by normalization; For the fault inclination index, calculating the fault inclination distribution of the target layer based on the fault actually-measured inclination angle, wherein the normalization processing result is that the fault inclination index of the fault inclination angle below 30 degrees is=1, and the fault inclination index of the fault inclination angle of 90 degrees is=0, so that the normalization is carried out to obtain the fault inclination index corresponding to each fault inclination angle; And for fracture density indexes, carrying out grid division on surface fractures at fixed intervals, counting the fracture length in each grid, and further calculating the fracture density of the target layer, wherein the normalization processing result is that the fracture density index of the fracture density of 0km/km 2 is=1, and the fracture density index of the fracture density of more than 30km/km 2 is=0, so that the fracture density indexes corresponding to the fracture densities are obtained through standardization.
6. The method for evaluating the strength of structural deformation according to claim 2, wherein the two-dimensionally matching the structural element indexes subjected to the normalization processing with the structural deformation strength standard value system to obtain the values of the structural element indexes corresponding to the standard values comprises: Based on a stratum distribution map, a fault dip angle measuring point distribution map and a structural outline map of a target area, acquiring numerical values and corresponding longitude and latitude coordinates of each structural element index at the change boundary of each structural element index based on each structural element index subjected to normalization processing, and further forming a contour map of each structural element index; and carrying out two-dimensional matching on each contour map and the structural deformation strong and weak standard value system, and determining the value of the structural element index corresponding to each standard value based on longitude and latitude coordinates of each sampling point.
7. The structural deformation evaluating method according to claim 1, wherein the correlation analysis is performed on the formation curvature and each structural element index based on the values of each of the standard values and the corresponding structural element index, and further the weight assignment is performed on each structural element index: Performing correlation analysis on each construction element index and the corresponding stratum curvature based on each standard value and the corresponding value of the construction element index to obtain a correlation coefficient matrix; acquiring Pelson coefficients of the construction element indexes based on the correlation coefficient matrix; Ranking the correlation of each of the constituent indices with formation curvature based on the absolute value of each of the pearson coefficients; and carrying out weight assignment on each construction element index based on the sorting result.
8. An electronic device, the electronic device comprising: at least one processor, and A memory communicatively coupled to the at least one processor, wherein, The memory stores instructions executable by the at least one processor to enable the at least one processor to perform the construction distortion strength evaluation method of any one of claims 1-7.
9. A non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the construction deformation strength evaluation method according to any one of claims 1 to 7.
10. The structural deformation evaluating apparatus according to claim 1, comprising: the acquisition module is used for acquiring a structural skeleton profile of the target area; The calculation and normalization processing module is used for calculating the stratum curvature of the target layer based on the structural skeleton profile and carrying out normalization processing on the stratum curvature; The establishing module is used for establishing a construction deformation strength standard value system based on the stratum curvature after the normalization processing is completed; the acquisition and normalization processing module is used for acquiring each structural element index of the target layer based on a geological map of the target area and carrying out normalization processing on each structural element index; The matching module is used for carrying out two-dimensional matching on the structural element indexes subjected to the normalization processing and the structural deformation strength standard value system to obtain the values of the structural element indexes corresponding to the standard values; The correlation analysis and weight assignment module is used for carrying out correlation analysis on the formation curvature and the construction element indexes based on the standard values and the corresponding values of the construction element indexes, and further carrying out weight assignment on the construction element indexes; And the evaluation module is used for evaluating the structural deformation strength of the target area based on the structural element indexes and the corresponding weights thereof.

Description

Structural deformation strength evaluation method, electronic equipment, storage medium and device Technical Field The invention belongs to the technical field of geological exploration, and particularly relates to a structural deformation strength evaluation method, electronic equipment, a storage medium and a device. Background The construction movement plays an important role in controlling the generation, migration and aggregation of oil and gas, is a dynamic mechanism for the formation and evolution of hydrocarbon-bearing basins, and influences the formation and configuration of hydrocarbon source rocks, reservoirs, overburden and traps in the basins. The structural trails (fractures, folds, cracks, non-integrations, etc.) provide good oil and gas migration channels and capping conditions on the one hand, and on the other hand, the strong activity area causes the oil and gas escape channels to open, which causes strong damage to oil and gas preservation. Therefore, the establishment of the structural deformation strength is an important index for measuring the influence of structural movement on oil and gas preservation, and has important indication significance for oil and gas exploration and development. Most of the basins in China are located below the altitude of 1300m, and the regional measurement data are rich. The evaluation of the oil and gas structure preservation condition of the basin is mainly based on zone adjustment reports, earthquakes, heavy magnetism, drilling data and the like, and quantitative analysis of related structure deformation influencing factors (such as stratum inclination angles, stratum erosion amounts and the like) is carried out by combining the structure evolution history. However, due to factors such as severe environment, high drilling and earthquake deployment cost and the like, certain basin exploration degrees are low, well earthquake and other data are deficient, so that the prior structural deformation intensity is mostly qualitatively analyzed, a quantitative analysis method is not introduced, the problems of unknown structural characteristics of the basin, unclear structural evolution mechanism and the like exist, and the difficulty of evaluating the structural deformation intensity of the basin is increased. The information disclosed in the background section of the invention is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art. Disclosure of Invention The invention aims to provide a structural deformation strength evaluation method, electronic equipment, a storage medium and a device, which are used for realizing correlation analysis of a skeleton profile and a geological map of a depending structure by introducing stratum curvature indexes and other structural element indexes, quantitatively representing the structural deformation strength of a basin, greatly reducing the difficulty of evaluating the structural deformation strength of the basin and providing a reliable theoretical basis for optimizing a favorable region of oil and gas storage of the basin. In order to achieve the above object, the present invention provides a method for evaluating structural deformation strength, an electronic device, a storage medium, and a device. According to a first aspect of the present invention, a method for evaluating structural deformation strength is provided, including: acquiring a structural skeleton cross-section of a target area; Calculating the stratum curvature of the target layer based on the structural skeleton profile, and carrying out normalization processing on the stratum curvature; establishing a construction deformation strength standard value system based on the stratum curvature after the normalization processing is completed; Acquiring each structural element index of a target layer based on a geological map of a target area, and carrying out normalization processing on each structural element index; Two-dimensional matching is carried out on the structural element indexes subjected to the normalization processing and the structural deformation strength standard value system, and the values of the structural element indexes corresponding to the standard values are obtained; performing correlation analysis on the stratum curvature and the construction element indexes based on the standard values and the corresponding construction element indexes, and further performing weight assignment on the construction element indexes; And evaluating the structural deformation strength of the target area based on the structural element indexes and the corresponding weights thereof. Optionally, the calculating the formation curvature of the target layer by the constructing skeleton profile includes: Establishing a coordinate system in the structural skeleton section based on