Multi-scale seismic full waveform inversion in the frequency-domain with a multi-grid method
Song Jian-Yong1, Zheng Xiao-Dong1, Qin Zhen1, and Su Ben-Yu2
1. Geophysical Department CNPC RIPED, Beijing, 10083, China.
2. Department of Earth Resources Engineering, Graduate School of Engineering, Kyushu University, Fukuoka, 819-0395, Japan.
Abstract：
Although full waveform inversion in the frequency domain can overcome the local minima problem in the time direction, such problem still exists in the space direction because of the media subsurface complexity. Based on the optimal steep descent methods,we present an algorithm which combines the preconditioned bi-conjugated gradient stable method and the multi-grid method to compute the wave propagation and the gradient space.The multiple scale prosperity of the waveform inversion and the multi-grid method can overcome the inverse problems local minima defect and accelerate convergence. The local inhomogeneous three-hole model simulated results and the Marmousi model certify the algorithm effectiveness.
SONG Jian-Yong,ZHENG Xiao-Dong,QIN Zhen et al. Multi-scale seismic full waveform inversion in the frequency-domain with a multi-grid method[J]. APPLIED GEOPHYSICS, 2011, 8(4): 303-310.
2011, Vol. 8 
