Method and device for simulating tectonic stress field

Abstract

The embodiment of the invention provides a method and a device for simulating a tectonic stress field. The method comprises the following steps: utilizing tectonic explaining result information in a target work area to establish a tectonic model; confirming interior physical property parameters by utilizing material attribute information acquired from a rock mechanical test for seismic inversion result data and an objective interval rock sample in the target work area; performing tectonic evolutionary analysis treatment on the tectonic model in combination with geological background information, thereby acquiring bottom margin displacement information; confirming static rock pressure according to objective interval burial depth and logging density curve and confirming an inferior tectonic force in a preset period at a boundary of a target work area on the basis of the geological background information; respectively utilizing the static rock pressure, the inferior tectonic force in the preset period and the bottom margin displacement information as the constraint conditions of the top boundary, the peripheral boundary and the bottom boundary of the tectonic model and performing finite element modeling and calculating treatment in combination with an interior physical property parameter, thereby acquiring the tectonic stress field in the target work area. The technical scheme provided by the embodiment of the invention is utilized to more accurately confirm the tectonic stress field in the work area.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration, in particular to a method and device for simulating a structural stress field. Background technique [0002] In the process of oil and gas exploration and development, the structural stress field can control the construction and transformation of oil and gas basins, the distribution of fractured reservoirs, affect the migration and accumulation of oil and gas, the opening and closing history of faults and fractures, and the permeability of low-permeability reservoirs Rate anisotropy and well pattern deployment and drilling technology, etc. Therefore, the study of tectonic stress field plays an important role. [0003] In recent years, as engineering applications have continuously improved the calculation accuracy of 3D tectonic stress field, numerical simulation method has gradually become the main research method for simulating tectonic stress field. Existing numerical simulati...

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Problems solved by technology

The numerical simulation methods in the prior art either use a complete elastic body or use an elastoplastic method without studying the deformation history of geological bodies, resulting in the inability to accurately determine the size and direction of the structural stress field in the work area and fail to meet the accuracy requirements of follow-up research

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