Frequency-domain mesh-free finite-difference operator for visco-acoustic wave equation
Junichi Takekawa, Hitoshi Mikada · Recent advances in exploration geophysics · 2016
In the present study, we apply a mesh-free finite difference method (MF-FDM) to frequency-domain visco-acoustic wave propagation.Although the full-waveform inversion (FWI) is a powerful tool to investigate the subsurface quantitatively, FWI requires a huge amount of computer resources.This poses an obstacle to apply FWI to practical studies especially in three-dimensional cases.MF-FDM has a potential to decrease the computational costs for making synthetic data sets in a simple manner.We demonstrate the effectiveness of MF-FDM using numerical experiments.Our results show that the proposed method can improve the numerical efficiency without sacrificing the numerical accuracy.