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Shale brittleness prediction method based on rock physical analysis

A rock brittleness and prediction method technology, applied in the direction of soil material testing, material inspection products, etc., can solve the problems of non-universality

Inactive Publication Date: 2017-04-19
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, for shale, it has regional differences and characteristic differences. Only by comprehensively researching and analyzing the actual rock samples, well logging, seismic and other data in the research target area, and proposing targeted methods on this basis, can it be more targeted. Moreover, the method proposed above is not universal, and it is debatable whether it is applicable to shale

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  • Shale brittleness prediction method based on rock physical analysis
  • Shale brittleness prediction method based on rock physical analysis
  • Shale brittleness prediction method based on rock physical analysis

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[0021] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0022] The invention belongs to the application research of unconventional shale brittleness prediction technology, and specifically relates to the prediction of favorable brittle shale distribution areas in actual work areas on the basis of petrophysical analysis of shale rock samples. The present invention takes the actually selected shale target layer of the work area as the main research target, obtains the rock samples of the target sec...

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Abstract

The invention provides a shale brittleness prediction method based on rock physical analysis. The method comprises the following steps: analyzing a shale sample to obtain the elasticity parameter characteristics of the shale sample; based on the obtained elasticity parameter characteristics, establishing a rock brittleness factor expression; utilizing the rock brittleness factor expression to calculate the brittleness factor value of rock in a reflecting interface in seismic data, and according to the calculated values, describing the brittleness of the shale sample. According to the method, for the first time, shale in the target section of an actual selected area is chosen to carry out statistic analysis of brittleness of shale. According to the statistical law, a brittle factor expression capable of representing the shale brittleness conditions is established. Under the assistance of a pre-stack seismic inversion technology, the description of shale brittleness is realized; and the method is used to predict shale brittleness, is based on rock physical analysis, and has the characteristics of pertinency, practicality, and innovation.

Description

technical field [0001] The invention belongs to the field of unconventional shale gas exploration and development, and in particular relates to a shale brittleness prediction method based on petrophysical analysis. Background technique [0002] Shale gas refers to natural gas with methane as the main component and stored in high-carbon mudstone or dark (black) mudstone in the form of free and adsorbed states. Free and adsorbed properties are the main characteristics of shale gas. Shale gas is produced in rock series dominated by organic-rich mud shale with extremely low porosity and permeability, and is a typical unconventional natural gas. Due to its particularity, shale gas was first recognized abroad in the 1720s. At present, with the continuous demand for oil and gas, unconventional shale gas has become an important oil and gas resource in my country. The global shale gas resources are huge (456×1012m 3 , 2012), which is equivalent to the sum of tight sandstone gas an...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 陈勇关达孙振涛刘玉琦朱博华章惠董清源李洋冉琦
Owner CHINA PETROLEUM & CHEM CORP
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