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A Strategy for Elastic Wave Simulation Based on Pseudo-analytical Operator Differencing
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 78th EAGE Conference and Exhibition 2016, May 2016, Volume 2016, p.1 - 5
Abstract
The approach implemented to wave propagation is one of the key factors that will not only determine the accuracy but also influence the computational efficiency. In this paper, by introducing coupled velocity, predictor-corrector strategy for elastic wave simulation is proposed to extend the k-space method from acoustic wave equation to elastic wave equation. Considering the massive computational cost while solving k-space method in spectral domain directly, we adopt optimal finite-difference coefficients based on k-space method to improve the efficiency. Numerical example demonstrates that the proposed strategy can suppress numerical dispersion both in space and time effectively. Furthermore, this method allows us to use large sampling step both in space and time, thus reducing the amount of calculation.