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3D Acoustic Wave Modelling with a Globally Optimal Finite-difference Scheme Based on Least Squares
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 76th EAGE Conference and Exhibition 2014, Jun 2014, Volume 2014, p.1 - 5
Abstract
Summary
High-order finite-difference (FD) methods have been widely used in numerically solving seismic wave equations. Under the same accuracy, the least square-based (LS) optimal FD method for the 3D acoustic wave equation can improve the computational efficiency compared with the Taylor series expansion-based FD method. To increase the efficiency further, we introduce the scheme of adaptive variable-length spatial operators. The hybrid absorbing boundary condition is adopted to suppress the artificial reflections caused by the finite boundary. Dispersion analysis and modelling examples demonstrate advantages and accuracy of the LSM.
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