Shale gas reservoir classification method and device and storage medium

A classification method and a classification device technology, applied in earthwork drilling, measurement, wellbore/well components, etc., can solve problems such as multiple solutions, falling into other intervals, and different degrees of influence on shale gas reservoirs, etc.

Active Publication Date: 2021-05-28
PETROCHINA CO LTD
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Problems solved by technology

[0004] However, each geological parameter has a different degree of influence on the production of shale gas reservoirs. Simply dividing the reservoir types of shale gas reservoirs according to the above-mentioned partitioning method is often prone to occurrence of shale gas reservoirs. some of the geological parameters fall in one interval, while others fall in other intervals
Therefore, when determining the reservoir type according to the interval range of geological parameters, there will be a problem of multiple solutions

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  • Shale gas reservoir classification method and device and storage medium
  • Shale gas reservoir classification method and device and storage medium
  • Shale gas reservoir classification method and device and storage medium

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[0027] In order to make the purpose, technical solution and advantages of the present disclosure clearer, the implementation manners of the present disclosure will be further described in detail below in conjunction with the accompanying drawings.

[0028] Reservoir category evaluation of shale gas reservoirs is an important content of logging interpretation evaluation. At present, the reservoir category of shale gas reservoirs is usually determined according to the absolute values ​​of total organic carbon content, porosity, total gas content and brittleness index of shale gas reservoirs, namely:

[0029] (1) When TOC≥3, Por≥4, GT≥3 and Brit≥55, the shale gas reservoir belongs to the first-class reservoir and belongs to the high-yield reservoir;

[0030] (2) When 3>TOC≥2 and 4>Por≥3 and 3>GT≥2 and 55>Brit≥35, the shale gas reservoir is a second-class reservoir and belongs to the medium-production reservoir;

[0031] (3) When 2>TOC≥1 and 3>Por and 2>GT≥1 and 35>Brit, the shal...

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Abstract

The invention discloses a shale gas reservoir classification method and device and a storage medium. The classification method includes the steps that a correlation between geological parameters and shale gas reservoir quality coefficients is obtained, wherein the shale gas reservoir quality coefficients are used for reflecting reservoir categories; geological parameters of a to-be-measured shale gas reservoir are obtained, and a shale gas reservoir quality coefficient corresponding to the geological parameters of the to-be-measured shale gas reservoir is determined based on the correlation; and according to the shale gas reservoir quality coefficients corresponding to the geological parameters of the to-be-measured shale gas reservoir, the reservoir category of the to-be-measured shale gas reservoir is determined. According to the shale gas reservoir classification method and device and the storage medium, the reservoir category of the to-be-measured shale gas reservoir can be accurately determined.

Description

technical field [0001] The present disclosure relates to the technical field of reservoir exploitation, in particular to a classification method, device and storage medium for shale gas reservoirs. Background technique [0002] Shale gas reservoirs can be divided into three types of reservoirs according to the gas production rate. Among them, the first type of reservoirs has a relatively fast gas production rate and belongs to high-yield reservoirs; the second type of reservoirs has a moderate gas production rate and belongs to middle-yield reservoirs. The gas production rate of the third type of reservoir is relatively slow, which belongs to the low-yield reservoir. The gas production rate of shale gas reservoirs determines the industrial exploitation value of shale gas reservoirs. Therefore, it is necessary to determine the reservoir type of shale gas reservoirs in the exploration and development of shale gas. [0003] In related technologies, geological parameters are us...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00E21B47/00
CPCE21B49/00E21B47/00
Inventor 钟光海廖茂杰杨杨王广耀高翔
Owner PETROCHINA CO LTD
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