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Numerical simulation method for heterogeneous formation stress field

A technology of formation stress and numerical simulation, applied in 3D modeling, image data processing, electrical digital data processing, etc., can solve the problem of poor modeling function, difficulty in building models, and inability to truly reflect the tectonic and morphological changes in the study area. Rock heterogeneity to solve problems such as applicability and accuracy of simulation results

Inactive Publication Date: 2017-01-11
张树森 +1
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Problems solved by technology

Two-dimensional numerical simulations often use sand thickness maps as modeling constraints to carry out modeling and assign rock mechanics parameters, which inevitably ignores the study of vertical lithological changes and structural changes in formations; while three-dimensional space Most of the numerical simulations are based on the two-dimensional numerical simulation method, and the vertical thickness is increased. Although the three-dimensional model is obtained, the assignment of rock mechanics parameters still uses the two-dimensional modeling method, which cannot truly reflect the three-dimensional space of the research area. Tectonic Morphological Changes and Rock Heterogeneity in
Due to the poor modeling function of the finite element analysis software widely used at present, it is difficult to directly establish a model that conforms to geological understanding in the finite element analysis software

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  • Numerical simulation method for heterogeneous formation stress field

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[0026] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0027] Such as figure 1 As shown, a numerical simulation method for the stress field of a heterogeneous formation includes the following steps:

[0028] (1) First, according to the geological understanding of the research strata, a geological model is established in professional geological modeling software. In this process, it is necessary to select a reasonable modeling method based on the actual situation of the original data obtained, such as logging data, 3D seismic data, and core data, to construct a 3D structural model and a 3D lithology distribution model for the research strata. The geological model should reasonably use seismic data or layer coordinate data to fully and accurately reflect the spatial fluctuation of the stratum; fully co...

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Abstract

The invention discloses a numerical simulation method for a heterogeneous formation stress field, and relates to the technical field of geology. The method comprises totally four steps: establishing a specialized geologic model, obtaining a three-dimensional spatial data body comprising formation structural configuration and lithological distribution research information, generating an ANSYS command stream file on the basis of the three-dimensional spatial data body and reading the command stream file for numerical simulation of the stress field in ANSYS software. According to the method, the three-dimensional geologic model generated by specialized geologic modeling software is read, a data structure is analyzed and matched to obtain the three-dimensional spatial data body comprising the formation structural configuration and lithological distribution research information, and the three-dimensional spatial data body is maximally utilized to generate the ANSYS command stream file and establish a mathematical model consistent with geologic knowledge in the ANSYS software by adopting the modeling concept of breaking up the whole into parts, so that the authenticity and the reliability of a simulation result are improved.

Description

technical field [0001] The invention relates to the technical field of geology, in particular to a numerical simulation method for the stress field of a heterogeneous formation. Background technique [0002] So far, the numerical simulation of formation stress field mainly includes two-dimensional numerical simulation and three-dimensional numerical simulation. Two-dimensional numerical simulations often use sand thickness maps as modeling constraints to carry out modeling and assign rock mechanics parameters, which inevitably ignores the study of vertical lithological changes and structural changes in formations; while three-dimensional space Most of the numerical simulations are based on the two-dimensional numerical simulation method, and the vertical thickness is increased. Although the three-dimensional model is obtained, the assignment of rock mechanics parameters still uses the two-dimensional modeling method, which cannot truly reflect the three-dimensional space of ...

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Application Information

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IPC IPC(8): G06F17/50G06T17/05
CPCG06F30/23G06T17/05
Inventor 张树森王继鹏赵向原
Owner 张树森
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