Anisotropic Seismic-Waveform Inversion and Least-Squares Reverse-Time Migration of Surface Seismic Data from the Soda Lake Geothermal Field

摘要

Accurate imaging of subsurface structures and fault/fracture zones is crucial for optimizing well placement and geothermal production. We apply anisotropic seismic-waveform inversion to the surface seismic data acquired at the Soda Lake geothermal field to construct a high-resolution subsurface velocity model, and use the model together with anisotropic least-squares reverse-time migration to obtain a high-resolution subsurface image. Compared to conventional reverse-time migration, our least-squares reverse-time migration produces a subsurface image with higher spatial resolution and balanced amplitudes. The image reveals some fault/fracture zones beneath the basalt structure. These inversion and imaging results can help optimize geothermal production at the Soda Lake geothermal plant.