一种基于纵横波互相关加权的微地震偏移定位方法
By employing a microseismic migration localization method that uses cross-correlation weighting of P-waves and S-waves, the problems of low signal-to-noise ratio and weak energy in microseismic monitoring have been solved, achieving higher accuracy and stronger noise resistance in microseismic event localization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- YANGTZE UNIVERSITY
- Filing Date
- 2023-12-06
- Publication Date
- 2026-07-17
AI Technical Summary
In existing microseismic monitoring technologies, the low signal-to-noise ratio and weak energy of the monitoring data result in low first arrival picking accuracy, which affects the positioning accuracy of microseismic events. Existing migration positioning methods have low objective function focusing and weak noise resistance.
A microseismic migration location method based on P-wave and S-wave cross-correlation weighting was adopted. By roughly estimating the first arrival travel time, a corrected velocity model was constructed. The polarity correction method of cross-correlation analysis was applied, and the objective function was constructed by combining P-wave and S-wave cross-correlation weighting. The maximum value of the objective function was solved by the grid search method to determine the location of microseismic events.
It improved the location accuracy of microseismic events, enhanced the noise resistance of monitoring data, and significantly improved the accuracy and resolution of location.
Smart Images
Figure CN117572500B_ABST