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2D Acoustic Wave Propagation on Unstructured Grids Using the Generalized Finite Difference Method
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 74th EAGE Conference and Exhibition incorporating EUROPEC 2012, Jun 2012, cp-293-00882
- ISBN: 978-90-73834-27-9
Abstract
Finite difference schemes on regular grids are efficient to accurately predict the seismic wave field, at least for smooth models. However, spurious diffractions become visible when the topography or internal interfaces do not align with the Cartesian grid. We propose to use the generalized finite difference scheme to propagate the wave field on unstructured meshes. We study the accuracy of the proposed solution on simple applications for the 2D acoustic constant density case and show that triangular meshes allow to reduce the imprint of diffractions.