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A Wave-Equation Modeling And Migration Algorithm For Anisotropics Media
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 6th International Congress of the Brazilian Geophysical Society, Aug 1999, cp-215-00381
Abstract
The interpretation of seismic data acquired in areas characterized by velocity anisotropy is of particular<br>interest in reservoir geophysics. Foward modeling and adequate seismic migration algorithms can<br>enhance the dependability of interpretation. We attack this problem by exploiting the most fundamental<br>property of the anisotropic media which makes them different from the isotropic media, viz., the variation<br>of velocity with direction. This is accomplished by splitting the wave equation and replacing it by<br>two or more simpler equations which involve only one spatial derivative but a different velocity in each<br>case. The evaluation of the wavefield is carried out by setting up a finite-difference model in which a set<br>of difference relations derived from the simpler equations is used in an alternate fashion. We present<br>two examples of application, one in 2D and another in 3D.