Method for simulating tectonic stress field

A technology of tectonic stress and simulation method, applied in the field of stress simulation to achieve the effect of reducing economic risks

Pending Publication Date: 2020-01-17
INNER MONGOLIA UNIV OF SCI & TECH
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Problems solved by technology

[0004] Although many researchers have made valuable explorations in qualitative and quantitative research on fractures or fractured oil and gas reservoirs, the quantitative description and prediction of structural fractures in underground reservoirs is still an unsolved problem at home and abroad, and is in the exploratory stage

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  • Method for simulating tectonic stress field
  • Method for simulating tectonic stress field
  • Method for simulating tectonic stress field

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[0029] The following examples can enable those skilled in the art to understand the present invention more fully, but do not limit the present invention in any way. The experimental methods in the following examples are conventional methods unless otherwise specified.

[0030] The existing tectonic stress field simulation is based on the finite element analysis method and mainly focuses on the numerical simulation of the elastic mechanical properties of the rock mass. Through the necessary finite element analysis and numerical software simulation of the rock, the stress in the two-dimensional plane is finally calculated. The construction and simulation of the field provide the necessary technical reference for our actual engineering projects. The finite element analysis method can divide the functional continuous field of the rock mass into a series of finite units, the units are connected by nodes, and the unknown quantities in the unit structure can be obtained by interpolat...

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Abstract

The invention provides a method for simulating a tectonic stress field. The method comprises the following steps: establishing a geologic model; establishing a mathematical model; performing numericalsimulation; wherein the numerical simulation comprises selection and calculation of an external load acting force; constructing stress field numerical simulation calculation by an elastic-plastic incremental method; comparing with the stress direction and size of an actual measurement point; and determining whether the stress direction and magnitude are within an error range. According to the method, an elastic-plastic increment method is used for simulating the plastic deformation process of the target geologic body, and an artificial fracture development favorable area can be predicted moreaccurately through research of a tectonic stress field.

Description

technical field [0001] The invention relates to the field of stress simulation, and more specifically, to a simulation method for constructing a stress field. Background technique [0002] Oil and gas reservoir fracture prediction based on numerical simulation of tectonic stress field has attracted the attention of many oil and gas field workers in recent years. The study of fractures has a long history, but the study of reservoir fractures began in the middle of the 20th century. Since the discovery of natural fractures in Cretaceous reservoirs in the western United States and oil and gas production layers in the Middle East in the 1960s, many distinctive research methods have been formed so far. For example, starting from the structural characteristics of the structure itself, exploring the principal curvature of structural deformation In the late 1970s and early 1980s, domestic scholars mainly started from the tectonic stress field, and carried out numerical simulation m...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F119/14
Inventor 王茜茜王路吴祥业吕鹏飞
Owner INNER MONGOLIA UNIV OF SCI & TECH
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