Joint inversion for microseismic event positions and velocity structures by combining multi-scale deformable-layer tomography and master station earthquake location method

摘要

Hypocenter determination is an ever-green research topic in earthquake seismology, and it has gained interest recently for monitoring microseismicity in unconventional petroleum exploration. In the microseismic monitoring, both the seismic event positions and the velocity model of production area are critical for understanding the changes in the subsurface caused by the hydraulic fracturing. However, there are uncertainties in all velocity models due to limited data quality and coverage, and such uncertainties would degrade the accuracy of the event position inversion.