BENEFITS OF A SEISMIC MIGRATION-INVERSION TECHNIQUE FOR RESERVOIR DESCRIPTION

With the improvement in data quality and amplitude preserving preprocessing techniques, linearized inverse scattering algorithms can recover multiparameter information of the subsurface. In this context, an elastic migration/inversion (M/I) is applied to obtain high-resolution depth images representing approximately changes in elastic properties (e.g., P and S waves, and density) of a reservoir region. This technique uses ray and Born approximations within a least squares optimization scheme, and is formulated in the space-time domain. It consists in a prestack depth migration of the data, followed by an inversion at depth. Elastic images are estimated from amplitude changes with offset of the data.