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Method and system for calculating pyrite content in shale

A calculation method and a calculation system technology, applied in the field of rock physics research, can solve problems such as core destructiveness, pyrite content sampling position influence, etc.

Pending Publication Date: 2021-04-13
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

The existing mineral component identification technology usually uses chemical separation method to separate it from the rock and then measure it, or uses X-ray diffraction method to measure the powder sample. The core must be chemically treated before testing. The implementation process is destructive to the core, and the pyrite content is greatly affected by the sampling location

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  • Method and system for calculating pyrite content in shale
  • Method and system for calculating pyrite content in shale

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Embodiment Construction

[0025] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0026] Such as figure 1 Shown, the present invention provides a kind of calculating method of pyrite content in shale, comprises steps:

[0027] S1. Obtain CT scan data of the shale sample to be tested;

[0028] During specific implementation, CT scan data can be obtained through industrial CT technology, that is, the shale sample to be tested is put into an industrial CT machine for X-ray scanning to obtain CT scan data.

[0029] Industrial CT technology, that is, industrial computer tomography imaging technology, is a high-tech that emerged and developed rapidly in the 1980s. The density change reflects the density change of the section material, thus clearly and intuitively presenting the internal structure of the section and the material composition. In the petroleum industry, industrial CT technology is used in the research field of oil and gas reservoirs, and...

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Abstract

The invention provides a method and a system for calculating the pyrite content in shale. The method comprises the following steps: S1, acquiring CT scanning data of a shale sample to be detected; S2, reconstructing a three-dimensional grayscale image of the shale sample to be detected according to the CT scanning data; and S3, calculating the pyrite content according to the three-dimensional gray level image of the shale sample to be detected. The system comprises: an acquisition unit, which is used for acquiring CT scanning data of a shale sample to be detected; a reconstruction unit used for reconstructing a three-dimensional grayscale image of the shale sample to be detected according to the CT scanning data; and a calculation unit used for calculating the pyrite content according to the three-dimensional gray scale image of the shale sample to be detected. The pyrite content in the shale can be directly obtained without destroying a shale sample.

Description

technical field [0001] The invention belongs to the field of rock physics research, and in particular relates to a calculation method and system for pyrite content in shale. Background technique [0002] Pyrite is widely distributed in pyrite-rich mud shale, and it is an indicator mineral for the depositional environment and diagenetic environment of mud shale formation. There is a good positive correlation between pyrite content and TOC and liquid hydrocarbon (S1) content, which reflects that there is a close relationship between the formation and content of pyrite and pyrite content, and can affect the heat of pyrite. Lysis and lysis are promoted. Therefore, pyrite in shale reservoirs is an important factor that promotes pyrite hydrocarbon generation evolution and shale oil and gas enrichment and accumulation. According to the enrichment degree of pyrite in the vertical and horizontal directions, the accumulation of shale oil and gas can be predicted to a certain extent. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/046G06T7/90G06T5/00
CPCG01N23/046G06T7/90G06T2207/10081G06T2207/20032G06T2207/30132G06T5/70
Inventor 周枫白俊刘卫华沈珲王欢
Owner CHINA PETROLEUM & CHEM CORP
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