Heterogeneous reservoir geology-mechanics modeling method based on finite element method

A technology for heterogeneous reservoir and mechanics modeling, applied in geophysical measurements, instruments, etc., can solve problems such as the inability to achieve geo-mechanical modeling of heterogeneous reservoirs, and achieve low modeling cost and operability. Strong, high-precision effect

Inactive Publication Date: 2017-02-22
CHINA UNIV OF GEOSCIENCES (BEIJING)
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Problems solved by technology

[0003] The present invention aims to solve the above problems, and provides a method for modeling heterogeneous reservoir geology-mechanics

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  • Heterogeneous reservoir geology-mechanics modeling method based on finite element method
  • Heterogeneous reservoir geology-mechanics modeling method based on finite element method
  • Heterogeneous reservoir geology-mechanics modeling method based on finite element method

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Example Embodiment

[0032] The specific embodiments of the present invention are described below in conjunction with the drawings:

[0033] Taking the upper Paleozoic He-1 reservoir in the XXX oil region of Ordos as an example to illustrate the specific technical scheme of the present invention:-

[0034] The first step is to use the principles of small layer division, sequence stratigraphy, and seismic sedimentology to classify sedimentary microfacies and lithofacies to identify lithology (mudstone, argillaceous siltstone, siltstone, fine sandstone, medium sandstone, etc.) Gradient, sudden change interface.

[0035] In the second step, following the principle of sub-block-layer location-separation of lithology, different core samples were selected for uniaxial-triaxial compression test to obtain rock mechanics parameters of different intervals, combined with logging data and seismic data, The dynamic mechanical parameters interpreted by logging and the static mechanical parameters interpreted by rock ...

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Abstract

The invention relates to the field of oil and gas field exploration and development and geomechanics, and especially relates to a heterogeneous reservoir geology-mechanics modeling method based on a finite element method. According to the invention, small layer contrast, sedimentary microfacies dividing and sequence stratigraphy principles are comprehensively used to identify a lithologic gradient-abrupt change interface; seismic data inversion mechanical parameters are combined, and the result of a triaxial mechanical experiment and logging interpretation is used as constraint to realize heterogeneous reservoir geology-mechanics modeling based on the finite element method; based on actual geological data, the method digitizes corresponding geological information, and uses a computer programming language to develop a corresponding calculation program; finite element simulation software is used to realize heterogeneous reservoir geology-mechanics modeling; the method has a high practical value for heterogeneous reservoir geology-mechanics modeling, and has the advantages of low modeling cost and high operability; and the accuracy of geology-mechanics modeling can be greatly improved.

Description

technical field [0001] The invention relates to the fields of oil and gas field exploration and development and geomechanics, in particular to a heterogeneous reservoir geological-mechanical modeling method based on the finite element method. Background technique [0002] During the development of fractured reservoirs, numerical simulation of stress field based on finite element software such as ANSYS has gradually become a research hotspot for petroleum geologists. In-situ stress plays a crucial role in structural evolution, reservoir fracture prediction, hydrocarbon migration, fault sealing and well pattern deployment. At present, the stress field numerical simulation modeling often regards the rock formation as an average rock formation or simply divides the geological body into several different rock formations for modeling, both of which have a large gap with the actual situation of reservoir heterogeneity, and the rock formation Simply divided into several geological ...

Claims

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Application Information

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IPC IPC(8): G01V11/00
CPCG01V11/00
Inventor 刘敬寿丁文龙杨海盟卢霖金林
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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