Comparing full-waveform and amplitude-phase versus offset inversion to recover elastic parameters using a local solver

Abstract:

Both full-waveform and amplitudes and phases from seismic reflections are used in geophysical inversions to recover elastic parameters in regions of interest. In many inverse problems such as full-waveform inversion (FWI) or reverse-time migration (RTM) the key computational cost is the repeated seismic modeling. Due to data and model spaces dimensions, the inversion algorithms become too costly, so that practical approaches are needed to reduce the dimensionality of the problem. Using local solvers, we can reduce the size of the computational domain to small areas while preserving the elastic wavefield reconstruction. In this study, we compare full-waveform inversion and amplitude-phase versus offset inversion to recover elastic parameters for a reflector of interest using a local elastic solver.