A shale gas development geological stability evaluation method
By constructing an evaluation system that couples geological structure and seismic activity, and combining fault activation potential and seismic activity disturbance index, the multi-dimensional problem of geological stability evaluation in shale gas development has been solved, realizing dynamic tracking and accurate evaluation throughout the entire cycle, and improving the accuracy and guidance of the evaluation results.
CN121997104BActive Publication Date: 2026-06-23CHONGQING HUADI RESOURCES ENVIRONMENT TECH CO LTD +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHONGQING HUADI RESOURCES ENVIRONMENT TECH CO LTD
- Filing Date
- 2026-04-08
- Publication Date
- 2026-06-23
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Figure CN121997104B_ABST
Abstract
The application discloses a shale gas development geological stability evaluation method, which comprises the following steps: collecting geological structure data and seismic monitoring data of a shale gas development area, dividing a space zoning map of the shale gas development area into a plurality of grid units, determining a minimum complete magnitude Mc ; calculating a fault activation potential coefficient FAP in the grid unit based on a revised Mohr-Coulomb fault activation criterion, calculating a geological structure evaluation index TRI of the grid unit; fusing a seismic b value in the seismic monitoring data, constructing an ETAS model to calculate an external triggering rate of engineering activities, and calculating a seismic activity disturbance index SDI of the grid unit; and calculating a geological stability index by using the geological structure evaluation index TRI and the seismic activity disturbance index SDI, so as to evaluate the geological stability of the shale gas development area. The application can realize dynamic tracking and evaluation of the geological stability in the whole cycle of shale gas development.
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