2D Elastic Time-Laplace-Fourier-Domain Hybrid Full Waveform Inversion

摘要

Most full waveform inversion (FWI) algorithms are based on the acoustic wave equation. However, only a few studies are related to the elastic FWI, even though many geological targets of seismic exploration are located on elastic media. There~- fore, to invert the subsurface properties accurately, we must develop a suitable FWI algorithm for generating elastic parameters. In this paper, we developed an elastic hybrid FWI algorithm, in which wave-modeling is performed in the time domain, and other procedures are conducted in the Laplace-Fourier domain. As a modeling operator, we employed the staggered-grid finite-difference method using a first-order elastic wave equation. To validate the feasibility of our proposed algorithm, we applied it to land data recorded from Alberta, Canada.