Application of the double absorbing boundary condition in seismic modeling
Liu Yang1,2, Li Xiang-Yang1,2,3, and Chen Shuang-Quan1,2
1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China.
2. CNPC Key Laboratory of Geophysical Prospecting, China University of Petroleum, Beijing 102249, China.
3. Edinburgh Anisotropy Project, British Geophysical Survey, Edinburgh EH9 3LA, UK.
Abstract：
We apply the newly proposed double absorbing boundary condition (DABC) (Hagstrom et al., 2014) to solve the boundary reflection problem in seismic finite-difference (FD) modeling. In the DABC scheme, the local high-order absorbing boundary condition is used on two parallel artificial boundaries, and thus double absorption is achieved. Using the general 2D acoustic wave propagation equations as an example, we use the DABC in seismic FD modeling, and discuss the derivation and implementation steps in detail. Compared with the perfectly matched layer (PML), the complexity decreases, and the stability and flexibility improve. A homogeneous model and the SEG salt model are selected for numerical experiments. The results show that absorption using the DABC is considerably improved relative to the Clayton–Engquist boundary condition and nearly the same as that in the PML.
Liu Yang,Li Xiang-Yang,Chen Shuang-Quan. Application of the double absorbing boundary condition in seismic modeling[J]. APPLIED GEOPHYSICS, 2015, 12(1): 111-119.
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2015, Vol. 12 
