Mantle source oil and gas enrichment region analysis and prediction method based on crustal stress finite elements

A prediction method, a technology of ground stress, applied in special data processing applications, image data processing, instruments, etc., can solve the problems of inability to accurately display a specific position and low precision

A prediction method, a technology of ground stress, applied in special data processing applications, image data processing, instruments, etc., can solve the problems of inability to accurately display a specific position and low precision

CN110390175AActive Publication Date: 2019-10-29西安幔源油气勘探开发研究有限公司
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  • Mantle source oil and gas enrichment region analysis and prediction method based on crustal stress finite elements
  • Mantle source oil and gas enrichment region analysis and prediction method based on crustal stress finite elements
  • Mantle source oil and gas enrichment region analysis and prediction method based on crustal stress finite elements

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Embodiment Construction

[0048] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0049] The finite element analysis method is a quantitative analysis method that can accurately calculate the ground stress in a small range. The finite element method is a numerical method that uses a finite number of elements to discretize a continuum, and solves various mechanical and physical problems by performing slice interpolation on a finite number of elements. The finite element analysis method discretizes the geological model into finite units. The units of the geological model are unit bodies of various shapes (such as triangles, quadrilaterals, hexahedrons, etc.), and the field function of each unit is a simple Field functions, the set of these unit field functions can approximately represent the field functions of the entire continuum, according to the energy equation or weighted residual equation, a finite number of alg...

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Abstract

The invention relates to the technical field of petroleum and natural gas exploration. The invention discloses a mantle source oil and gas enrichment region analysis and prediction method based on crustal stress finite elements. In a primary modeling finite element analysis result, deep fluid filling is carried out in a pulse mode along a deep fracture crustal stress low-value area. An filled shallow low-crustal stress area is divided. Asecondary model is established, analysis is carried out according to a primary modeling analysis process, the crustal stress low-value position of the shallowfracture model is checked, the position is an oil-gas enrichment area, and the position is generally a high-yield oil-gas well. Therefore, the valance source oil and gas enrichment region analysis andprediction method based on the crustal stress finite element can accurately predict the oil and gas enrichment region and the specific reservoir forming part.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas exploration, in particular to a method for analyzing and predicting mantle source oil and gas enrichment areas based on in-situ stress finite elements. Background technique [0002] Since the beginning of petroleum geology, scholars have recognized the control of structures on oil and gas reservoirs, formed typical anticline oil control theory, fault block oil control theory and other systems, and successfully guided oil and gas exploration. The reason why the geological structure can control the accumulation is largely due to the in-situ stress at different structural positions. Compared with the surrounding wall rocks, the parts with relatively low in-situ stress are easy to enrich and form oil and gas reservoirs. Therefore, through the analysis of the current In situ stress analysis to predict the location of oil and gas accumulation. [0003] There are many analysis methods ...

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Application Information

Patent Timeline
29 Oct 2019
Publication
CN110390175A
IPC
G06F17/50; G06T17/05
CPC
G06T17/05; G06F30/23
Inventors
李玉琪; 李建红