3D frequency-domain finite-difference acoustic wave modeling on discontinuous grids

Li, Q.1,2; Jia, X.2; Zhang, W.1

2019

81st EAGE Conference and Exhibition 2019

London, United kingdom

EAGE Publishing BV

The frequency-domain finite-difference (FDFD) method is an effective tool for implementing frequency-domain seismic modeling and full waveform inversion. However, the computational cost for the FDFD method dealing with 3D large models is prohibitive, limiting its application. As a common strategy to improve computational efficiency, a nonuniform grid is usually adopted in the time-domain finite-difference (TDFD) method instead of the FDFD method. We propose a strategy to implement 3D frequency-domain acoustic wave modeling on discontinuous grids efficiently. In the whole model area discreted by discontinuous grids, we apply the 3D average-derivative optimal scheme (3D-ADOS) to simulate wave propagation in each subregion and use the conventional second-order or rotated second-order finite-difference scheme to calculate the wavefield in the transition area. In this way, the accuracy of the wavefield in the global area remains the same as that obtained by the conventional 3D-ADOS while the computational cost is reduced significantly. The numerical example is shown to verify the feasibility and efficiency of our strategy.
© 81st EAGE Conference and Exhibition 2019. All rights reserved.

第一 ; 通讯

EI

National Key Research and Development Program of China Stem Cell and Translational Research[2017YFB0202903] ; National Natural Science Foundation of China[41574107]

20194307569475

EV Compendex

1.Southern University of Science and Technology, China
2.University of Science and Technology of China, China

Li, Q.,Jia, X.,Zhang, W.. 3D frequency-domain finite-difference acoustic wave modeling on discontinuous grids[C]:EAGE Publishing BV,2019.