Coal shale organic matter maturity evaluation method and device
By using vitrinite reflectance, nanoindentation, and specific surface area tests, combined with mathematical optimization techniques, a maturity assessment model for organic matter in coal shale was established. This model solved the problems of low efficiency and sample damage associated with traditional methods, achieving highly accurate and efficient maturity assessment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA UNIV OF GEOSCIENCES (BEIJING)
- Filing Date
- 2026-05-18
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional methods for determining the maturity of organic matter in coal shale are inefficient, limited by the location of observation points and equipment, and cannot generate large-scale effective statistics. Optical determination of vitrinite reflectance in high-maturity coal shale is difficult to identify. Rock pyrolysis analysis is time-consuming and damages samples. Furthermore, there is a lack of methods for judging micromechanical properties and combining specific surface area assessment.
By employing vitrinite reflectance measurement, nanoindentation experiment, and specific surface area test, combined with mathematical optimization techniques, a basic physical model and a residual correction model were established. Parameter fitting was performed using elastic modulus and specific surface area values to construct an assessment model for the organic matter maturity of coal shale.
It improves the accuracy and efficiency of assessing the organic matter maturity of coal shale, avoids irreversible damage to samples, can accurately identify high-maturity coal shale, and provides continuous prediction of the organic matter maturity distribution over a wide range.
Smart Images
Figure CN122409999A_ABST