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Reservoir crack prediction method based on stress release rate

A stress release and fracture prediction technology, applied in the field of oil and gas field exploration and development, can solve the problems of difficulty in accurate quantitative prediction of reservoir fracture density, and achieve the effects of low prediction cost, strong operability, and high practical value

Inactive Publication Date: 2018-04-24
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0004] The present invention aims to solve the above problems, and provides a reservoir fracture prediction method based on stress release rate, which solves the problem that the reservoir fracture density is difficult to accurately and quantitatively predict

Method used

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  • Reservoir crack prediction method based on stress release rate
  • Reservoir crack prediction method based on stress release rate
  • Reservoir crack prediction method based on stress release rate

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specific Embodiment approach

[0055] The patent of the present invention takes the fracture prediction of the Longmaxi Formation shale reservoir in northern Guizhou as an example to illustrate the specific implementation of the patent of the present invention.

[0056] The tectonic location of this area is subordinate to the Upper Yangtze plate, and the structural units mainly include the north-north-east structural deformation area of ​​Fenggang, the eastern part of the north-east structural deformation area of ​​Bijie, and most of the complex structural deformation area of ​​Guiyang. The strata of the Silurian Longmaxi Formation were affected by the paleo-uplift in central Guizhou, and the sediments in the southern part were missing and eroded, and the strata were underdeveloped; the strata in the northern part were intact. The lower part of this group is gray-black-black carbonaceous mudstone, rich in graptolite, 30-120m thick, and upwards is dark gray-gray mudstone, siltstone with banded and lenticular ...

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Abstract

The invention relates to the field of oil and gas field exploration and development, and particularly relates to a reservoir crack prediction method based on the stress release rate. According to themethod disclosed by the invention, through measuring the mineral contents, the TOC contents and the rock mechanics of reservoirs in different areas, analyzing the correlation between mineral contentsand reservoir mechanics parameters, a three-dimensional mechanical parameter distribution is determined. Meanwhile, a finite element heterogeneous geomechanical model is established, and the ancient stress release rate simulation is carried out. Based on an established crack density calculation model, the three-dimensional distribution prediction of the crack density is realized. The method is realized through the strict mathematical algorithm derivation. A corresponding calculation program is developed by utilizing a computer programming language. According to the method, the problem that thereservoir crack density is difficult to quantitatively predict is solved.

Description

technical field [0001] The invention relates to the field of exploration and development of oil and gas fields, in particular to a reservoir fracture prediction method based on stress release rate. Background technique [0002] The successful exploration of marine shale gas in North America and the discovery of a large amount of shale gas in China indicate that natural fractures in low-porosity and low-permeability reservoirs can form important seepage channels. In addition, reservoirs can form connected fracture systems after hydraulic fracturing. thus becoming an effective reservoir. At present, breakthroughs in shale gas exploration of the Longmaxi Formation in the Sichuan Basin, as well as the adjacent areas in northern Guizhou, have gradually attracted the attention of geoscientists. The recent commercial development of the Jiaoshiba shale gas field in the Lower Silurian Longmaxi Formation in Chongqing shows that South China is an important strategic area for shale gas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V11/00
Inventor 刘敬寿
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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