A coal seam parting characterization method, device and storage medium

By using full-diameter spiral CT scanning and inorganic mineral classification and identification charts, combined with image processing technology, the problems of low resolution and high destructiveness in the evaluation of inorganic minerals and brittle parameters in coal reservoirs have been solved. Millimeter-level quantitative evaluation of the entire well section has been achieved, improving the accuracy and reliability of the evaluation and providing precise data for coalbed methane development.

CN122312464APending Publication Date: 2026-06-30PETROCHINA CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PETROCHINA CO LTD
Filing Date
2024-12-27
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing technologies for evaluating inorganic mineral content and brittleness parameters in coal reservoirs suffer from problems such as being time-consuming, highly destructive, having low resolution, and yielding inaccurate results, making it difficult to achieve millimeter-level quantitative evaluation across the entire well section.

Method used

High-resolution grayscale images of coal seams are obtained using full-diameter spiral CT scanning technology. Combined with inorganic mineral classification and identification charts and image processing technology, inorganic minerals are accurately classified, and brittleness parameters are calculated to generate a comprehensive evaluation map of mineral content and brittleness parameters for the entire coal reservoir section.

Benefits of technology

It has achieved precise classification of inorganic minerals in coal seams and accurate calculation of brittleness parameters, and for the first time realized millimeter-level quantitative evaluation of the entire well section, improving the accuracy and reliability of the evaluation and providing key data support for coalbed methane development.

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Abstract

This invention belongs to the field of digital core spiral CT scanning analysis technology, and relates to a method, device, and storage medium for characterizing coal seam intercalation. The method includes the following steps: acquiring a CT grayscale image of the coal seam; classifying the inorganic minerals in the CT grayscale image; establishing an inorganic mineral classification and identification chart for the coal seam; acquiring the inorganic mineral content of each CT scan cross-section corresponding to the coal seam; calculating the brittleness parameter of each CT scan cross-section; and generating characterization results based on the CT grayscale image, the inorganic mineral content, and the brittleness parameter. The coal seam intercalation characterization method, device, and storage medium provided in this application utilize a coal reservoir mineral content and brittleness parameter evaluation method based on full-diameter CT, achieving for the first time a quantitative evaluation of the inorganic mineral content and brittleness parameter of the entire well section of a coal reservoir at the millimeter level, providing valuable data support for the next step of coalbed methane development engineering fracturing.
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