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Published as Geophysics, 79, no. 4, C97-C110, (2014)
Fast algorithms for elastic-wave-mode separation and vector decomposition using low-rank approximation for anisotropic media
Jiubing Cheng, Tongji University, and Sergey Fomel, Bureau of Economic Geology, The University of Texas at Austin
Abstract:
Wave mode separation and vector decomposition are significantly more expensive
than wavefield extrapolation and are
the computational bottleneck for elastic reverse-time migration (ERTM) in heterogeneous anisotropic media.
We express elastic wave mode separation and vector decomposition for anisotropic media as space-wavenumber-domain operations
in the form of Fourier integral operators, and develop fast algorithms for their implementation
using their low-rank approximations. Synthetic data generated from 2D and 3D models demonstrate that these methods are accurate and efficient.
2014-06-24