Efficient Simulation of Elastic Waves Propagation in Anisotropic Media |
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Authors: | Vadim Lisitsa Egor Lys |
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Affiliation: | Institute of Petroleum Geology and Geophysics SB RAS, 3 Koptug pr., Novosibirsk, Russia, 630090 |
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Abstract: | The paper deals with finite–difference (f-d) approach to simulation of elastic waves' propagation in anisotropic elastic media with general symmetry. Any implementation of this approach claims resolution of two key problems: - construction of an effective f-d scheme itself; we propose to use the Lebedev's scheme (LS) being a natural generalization of Virieux staggered grid scheme (VS) widely used for isotropy; we prove that LS possesses better dispersion properties in comparison with well known Rotated Staggered Grids Scheme (RSGS).
- stable domain distension. The Perfectly Matched Layers(PML) useful for isotropic problems can be unstable in the case of anisotropy. Lebedev scheme allows one to use Optimal Grids (OG) which gives a possibility to implement efficient and low cost domain distension.
(© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) |
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