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Seismic Modelling with the Discontinuous Galerkin Finite–element Method – Application to Complex 3D Elastic MediaNormal access

Authors: V. Etienne, J. Virieux and S. Operto
Event name: 72nd EAGE Conference and Exhibition incorporating SPE EUROPEC 2010
Session: FWI & Modelling (EAGE)
Publication date: 14 June 2010
DOI: 10.3997/2214-4609.201400805
Organisations: SPE, EAGE
Language: English
Info: Extended abstract, PDF ( 383.54Kb )
Price: € 20

Summary:
We present a discontinuous Galerkin finite-element method (DG-FEM) suitable to seismic modelling in large scale 3D elastic media. The method makes use of unstructured tetrahedral meshes locally refined to the medium properties (h-adaptivity) and of interpolation orders that can change from one element to another according to an adequate criterion (p-adaptivity). These two features allow us to reduce significantly the numerical cost of the simulations. While the efficiency of DG-FEM has been largely demonstrated with high interpolation orders, we favour the use of low orders more appropriate to the applications we are interested in. In particular, we address the issues of seismic modelling or seismic imaging in case of complex geological structures requiring a fine medium discretisation.


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