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Method for constructing hydraulic fracturing fracture space seam net by utilizing microseism event points

A hydraulic fracturing and event point technology, applied in seismology, seismic signal processing, geophysical measurement, etc., can solve the problems of non-unique three-dimensional space and insufficient interpretation basis, and achieve reasonable fracture network construction and fracturing effect evaluation. effect of science

Inactive Publication Date: 2020-04-21
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

This method can roughly describe the orientation of fractures, but there are three problems in the description process: ① When describing the relationship between microseismic event points, the planar top view projection is used, and two points that are close to each other on the planar projection may not be in space. ②The fracture surface represented by the connection line between the two points described by the top view projection is not unique in the three-dimensional space; ③The connected microseismic event points are only determined to be the same fracture according to the orientation of the artificial fracture. very poor explanation

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  • Method for constructing hydraulic fracturing fracture space seam net by utilizing microseism event points
  • Method for constructing hydraulic fracturing fracture space seam net by utilizing microseism event points
  • Method for constructing hydraulic fracturing fracture space seam net by utilizing microseism event points

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[0016] In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments are listed below and shown in the accompanying drawings in detail as follows.

[0017] like figure 1 as shown, figure 1 It is a flowchart of a method for constructing a hydraulic fracture space fracture network using microseismic event points of the present invention.

[0018] In step 101, the regional stress field research is carried out by using the 3D seismic fine structure interpretation results of the target layer and combining with the regional tectonic evolution of the region. Firstly, through the study of stratigraphic development characteristics and regional basin-controlling fault evolution characteristics, the regional tectonic evolution of the study area was understood. On this basis, use 3D seismic data to carry out 1*1 grid fine interpretation of the target layer, and describe microstructures and microfaults in det...

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Abstract

The invention provides a method for constructing a hydraulic fracturing fracture space seam net by utilizing microseism event points. The method comprises the following steps of 1, carrying out regional stress field research by utilizing a three-dimensional seismic fine structure interpretation result of a target layer and combining regional structure evolution of a local region; 2, describing natural fracture distribution of the target layer by utilizing curvature analysis, coherence analysis and azimuth anisotropy analysis methods; and 3, in combination with regional stress field characteristics and the natural fracture distribution, constructing a hydraulic fracturing fracture space seam net by utilizing a time sequence and a space distribution position of the microseism event points. According to the method, when the microseism event points are used for constructing the hydraulic fracturing fracture space seam net, the regional stress field and the natural fracture distribution areconsidered, the time sequence and the space distribution position of the microseism event points in a fracturing construction process are also considered, seam net interpretation is more reasonable,and fracturing effect evaluation is more scientific.

Description

technical field [0001] The invention relates to the field of unconventional oil and gas development, and relates to a method for constructing a spatial fracture network of hydraulic fracturing fractures by using microseismic event points. Background technique [0002] Microseismic monitoring is a reservoir dynamic monitoring method that directly monitors activities such as underground fluid flow, fracture generation, or formation rupture by monitoring the weak seismic signals released by changes in the reservoir. In the fracturing process of unconventional oil and gas reservoirs, microseismic monitoring and combined seismic and geological interpretation of microseismic event points are the main means to evaluate fracturing effects. At present, the distribution characteristics of microseismic event points are mainly used to calculate the length, height, width, azimuth, inclination, and reservoir fracturing volume and other parameters of artificial fracturing fractures, and th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30
CPCG01V1/288G01V1/306G01V2210/624
Inventor 刘海宁李红梅宋明水韩宏伟江洁宫红波陈红
Owner CHINA PETROLEUM & CHEM CORP
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