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An Efficient Solver for a New Pure-anisotropic Wave Equation
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 78th EAGE Conference and Exhibition 2016, May 2016, Volume 2016, p.1 - 5
Abstract
Summary
Considerable work has been published on the modelisation of propagation in anisotropic media through pseudo-acoustic wave equation models. However, these wave equations suited for numerical implementation remain computationally demanding and generate artificial pseudo shear-waves that spoil any seismic imaging process.
Liu et al. [ Liu et al., Geophysics 2014 , 79(3), T(117–124)] introduced an explicit time evolving scheme for the constant-density acoustic wave equation in heterogeneous and isotropic medium. In the present paper we show that this ETE scheme can naturally be extended to compute generic pure-anisotropic wave propagation in heterogeneous media. While being efficient and simple, our new wave propagation solver describes correctly the anisotropic phase speed and does not generate artificial shear-waves. Numerical experiments we present illustrate this point for the specific TTI anisotropy model.
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