Abstract
In elastic wave forward modeling, absorbing boundary conditions (ABC) are used to mitigate undesired reflections from the model truncation boundaries. The perfectly matched layer (PML) has proved to be the best available ABC. However, the traditional splitting PML (SPML) ABC has some serious disadvantages: for example, global SPML ABCs require much more computing memory, although the implementation is easy. The implementation of local SPML ABCs also has some difficulties, since edges and corners must be considered. The traditional non-splitting perfectly matched layer (NPML) ABC has complex computation because of the convolution. In this paper, based on non-splitting perfectly matched layer (NPML) ABCs combined with the complex frequency-shifted stretching function (CFS), we introduce a novel numerical implementation method for PML absorbing boundary conditions with simple calculation equations, small memory requirement, and easy programming.
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This research was sponsored by the Chinese National Development and Reform Commission (No. [2005]2372) and the Innovative Technological Research Foundation of PetroChina Company Limited (No. 060511-1-3).
Qin Zhen received his master from Jianghan Petroleum University in 2004 and received his PhD from the China University of Geosciences in Wuhan in 2008. Currently, he is a post-doctor at the Research Institute of Petroleum Exploration & Development. His research work mainly focus on seismic pre-stack denoising, geophysical forward modeling, and geophysical inverse problems.
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Qin, Z., Lu, M., Zheng, X. et al. The implementation of an improved NPML absorbing boundary condition in elastic wave modeling. Appl. Geophys. 6, 113–121 (2009). https://doi.org/10.1007/s11770-009-0012-3
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DOI: https://doi.org/10.1007/s11770-009-0012-3