Ground deformation-based method for inversion of tectonic stress field in shale gas exploration area

Abstract

The invention relates to a ground deformation-based method for inversion of a tectonic stress field in a shale gas exploration area, and the method comprises the following steps: determining a research region by a satellite, establishing a basic geological data database, determining an earth's surface deformation value of the research region by an earth's surface deformation processing module and establishing an earth's surface deformation database; establishing a geological model of the research region by a geographic information processing module, giving the earth's surface deformation value to the geological model, establishing a displacement calculation model by corresponding to the geological model with a finite element analysis module, obtaining an initial displacement field database of the research region, comparing data of the initial displacement field database, determining a corrected displacement field database, and solving by the finite element analysis module to obtain basic stress data of the research region. The method can accurately simulate a tectonic stress field in the shale gas exploration and development region, and can obtain a large-large scale and high-precision tectonic stress field.

Description

technical field [0001] The invention relates to the technical field of shale gas exploration and development, in particular to a method for inversion of structural stress field in a shale gas exploration area based on ground deformation. Background technique [0002] Shale gas reservoir conditions belong to fractured low permeability or ultra-low permeability. At present, in the exploration and development of shale gas, the analysis of regional tectonic stress field is often used to infer rock fracture conditions, and then evaluate the distribution characteristics of shale gas, etc. . In addition, currently in the process of shale gas development, fracturing wells is an effective way to develop shale gas. Then, due to the great difference between the geological and mechanical characteristics of shale gas reservoirs and conventional oil and gas resources, affected by the stress field of geological structures, the selection of fracturing methods and fracturing parameters unde...

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Problems solved by technology

[0005] This application provides a method for inversion of tectonic stress field in shale gas exploration area based on ground deformation, which solves or partly solves the problem of inability to obtain large-scale and high-precision tectonic stress field data in the prior art, which causes problems in exploration and development. The design and implementation of related parameters lack quantitative scientific basis and technical issues, and it can accurately simulate the structural stress field in the shale gas exploration and development zone, providing data for the structural stress field required in the exploration and development of shale gas. It provides an effective solution, and at the same time fills the technical effect of obtaining large-scale, high-precision tectonic stress field research gaps

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