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.
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This research is supported by the National Nature Science Foundation of China (Grant No. U1262208) and the Important National Science & Technology Specific Projects (Grant No. 2011ZX05019-008).
Liu Yang is a PhD student in the Department of Geological Resources and Geological Engineering, China University of Petroleum (Beijing). Her research interests are high-precision numerical modeling, physical modeling of rugged topography, and seismic processing.
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Liu, Y., Li, XY. & Chen, SQ. Application of the double absorbing boundary condition in seismic modeling. Appl. Geophys. 12, 111–119 (2015). https://doi.org/10.1007/s11770-014-0463-z
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DOI: https://doi.org/10.1007/s11770-014-0463-z