Method for quantitatively characterizing fracture mechanical properties based on structural style analysis

A technology of fracture mechanics and quantitative characterization, applied in seismology, measuring devices, scientific instruments, etc., can solve the problems that the classification scheme does not clearly define the basis and standards of classification, cannot meet the needs of exploration and development, changes, etc.
CN112305609AActive Publication Date: 2021-02-02CHINA NAT OFFSHORE OIL CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA NAT OFFSHORE OIL CORP
Publication Date
2021-02-02

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Abstract

The invention discloses a method for quantitatively characterizing fracture mechanical properties based on structural style analysis. The method comprises the following steps: reading fracture-relatedstructural style characteristics based on three-dimensional seismic data, coherent data volume data and curvature data volume data; selecting five types of structural styles capable of reflecting fracture mechanical properties based on the difference characteristics of fractures under different property region stress backgrounds, and establishing a detailed structural style database; by establishing a membership function and an evaluation matrix, solving weight coefficients and membership degrees of the five types of structural styles, and preliminarily realizing conversion from geological features to quantitative data; establishing a quantitative evaluation mathematical model based on the five types of structural style weight coefficients and the single structural style membership degree, and solving a mechanical property numerical value of each breakpoint; and based on the mechanical property numerical value of each breakpoint, drawing a plane distribution diagram of the fracture mechanical property numerical value of each trunk by using Petrel software to finish division of the quantitative evaluation standard of the fracture mechanical property of the continental facies subsidence basin. According to the method, the fracture property can be efficiently, accurately and quantitatively described.
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Description

Technical field

[0001] The invention relates to a method for analyzing and quantitatively characterizing the mechanical properties of a fracture zone. In particular, it relates to a method for quantitatively characterizing fracture mechanical properties based on structural pattern analysis.Background technique

[0002] The Cenozoic continental fault-bearing petroliferous basins in eastern China, whose development and evolution are generally controlled by the dual tectonic effects of horizontal extension generated by mantle upwelling and strike-slip shear generated by the activities of the Tanlu fault zone (Ma Xingyuan, 1983; Xu Jiawei, 1995) ; Qi Jiafu, 2014; etc.), leading to very developed faults in the basin and complex and diverse fault properties, which also leads to the complex and reservoir-controlling effects of faults, which have always been research hotspots and difficulties.

[0003] In recent years, with the continuous deepening of exploration and development research in the Bohai...

Claims

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