Method for establishing high-precision three-dimensional ground stress model for heterogeneous formation
A technology for model establishment and in-situ stress, which is applied in the fields of earthwork drilling, wellbore/well components, etc., can solve problems such as failure to meet the accuracy requirements of oil and gas exploration and development, inability to effectively guide oil and gas drilling and development projects, and limited accuracy. The effect of reducing risk cost, improving accuracy and improving efficiency
Active Publication Date: 2016-10-12
CHINA UNIV OF PETROLEUM (BEIJING)
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However, due to the limited accuracy of the geological model, the accuracy of the three-dimensional stress distribution model established by the three-dimensional finite element numerical simulation technology cannot meet the accuracy requirements of oil and gas exploration and development, and cannot effectively guide oil and gas drilling and development projects.
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[0038] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The following description is only for demonstration and explanation, and does not limit the present invention in any form.
[0039] The establishment method of high-precision 3D ground stress model in heterogeneous formation includes the following four steps:
[0040] Step 1, using drilling, well logging and 3D seismic data to establish a 3D grid model of the heterogeneous formation;
[0041] Step 2, using 3D seismic data inversion and logging data to establish a 3D petrophysical parameter model for heterogeneous formations;
[0042] Step 3, carry out the three-dimensional finite element numerical simulation calculation of the spatial distribution law of the high-precision ground stress in the heterogeneous formation;
[0043] Step 4, establishing a high-precision three-dimensional in-situ stress distribution model for heterogeneous formations...
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The invention relates to a method for establishing a high-precision three-dimensional ground stress model for a heterogeneous formation. The method includes the first step of establishing a three-dimensional framework model for the heterogeneous formation according to drilling data, logging data and three-dimensional seismic data, the second step of establishing a three-dimensional rock physical parameter model for the heterogeneous formation according to three-dimensional seismic data inversion and the logging data, the third step of conducting three-dimensional finite element numerical simulation calculation on high-precision ground stress spatial distribution patterns of the heterogeneous formation, and the fourth step of establishing the high-precision three-dimensional ground stress distribution model for the heterogeneous formation. By means of the method for establishing the high-precision three-dimensional ground stress model for the heterogeneous formation, reliable reference can be provided for compact low-permeability oil and gas field development and sweet spot prediction and exploration and development of unconventional oil and gas, exploration and development efficiency of compact low-permeability and nonconventional oil and gas is effectively improved, and the risk cost of exploration and development of compact low-permeability and nonconventional oil and gas is lowered.
Description
technical field [0001] The invention relates to the fields of oil and gas geology and computer technology, in particular to a method for establishing a high-precision three-dimensional ground stress model of a heterogeneous formation. Background technique [0002] The high-precision 3D in-situ stress distribution law is the core geological parameter for unconventional oil and gas reservoir engineering sweet spot evaluation and exploration and development. At present, the three-dimensional finite element numerical simulation technology is mainly used to establish a three-dimensional geostress distribution model in a region. However, due to the limited accuracy of the geological model, the accuracy of the three-dimensional stress distribution model established by the three-dimensional finite element numerical simulation technology cannot meet the accuracy requirements of oil and gas exploration and development, and cannot effectively guide oil and gas drilling and development ...
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IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 曾联波祖克威刘国平
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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