A quantitative comprehensive evaluation method for coalbed methane dessert area

CN122412940APending Publication Date: 2026-07-17SOUTHWEST PETROLEUM UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTHWEST PETROLEUM UNIV
Filing Date
2026-04-24
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies for evaluating sweet spots in coalbed methane are insufficient to fully reflect the comprehensive geological constraints of multiple factors. They suffer from dimensional differences, redundant indicators, and correlation issues, leading to unreasonable amplification of evaluation results and reduced objectivity.

Method used

A multi-factor comprehensive evaluation index system was constructed, and the indicators were made in the same direction and standardized. The Z-score standardization method was adopted, and combined with principal component analysis, common factors were extracted to calculate the comprehensive evaluation value.

Benefits of technology

This method enables quantitative classification of sweet spots in coalbed methane, improves the objectivity and comparability of evaluation results, reduces indicator redundancy and correlation, and enhances the accuracy and stability of the evaluation.

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Abstract

The application discloses a kind of coal bed gas dessert area quantitative comprehensive evaluation method, comprising the following steps: S1: the comprehensive evaluation index system consisting of sedimentary condition, gas content, tectonic condition, hydrogeological condition, ground stress condition, fracture development condition and burial-coal structure condition is constructed;S2: the data of each index of target evaluation unit is obtained, and original data table is established;S3: each index is subjected to index homodirection and standardization processing, and standardization result table is obtained;S4: the index in the standardization result table is subjected to average under similar condition, and first-level comprehensive index calculation result table is obtained;S5: the index in the first-level comprehensive index calculation result table is subjected to standardization processing and principal component analysis, and comprehensive evaluation value is obtained;S6: the comprehensive evaluation value is used as the index for evaluating coal bed gas dessert, and the greater the comprehensive evaluation value, the more corresponding evaluation unit is conducive to forming dessert area.The application can more accurately quantitatively comprehensively evaluate coal bed gas dessert.
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