Surface-Consistent Amplitude Simultaneous Joint Inversion for PP and PS Data

Abstract

Surface-consistent amplitude corrections are commonly used to correct for the amplitude variations due to nearsurface conditions in land processing. Usually, the corrections for PP and PS datasets are computed separately. There are, however, sound geophysical reasons why a subset of these scalars should be common or shared between PP and PS data. The simultaneous joint estimation of the source and receiver correction scalars for PP and PS datasets that we propose is a way to ensure the consistency of the surface-consistent corrections for both datasets. It also enables a better estimation of the source term which must be identical for PP and PS traces originating from the same shot to be in accordance with the surface-consistent model. When performing surface consistent amplitude corrections of PS datasets, only the radial projection is usually used for the estimation of surface-consistent scalars. As regards the simultaneous joint inversion we also investigated the use of the transverse projection in addition to the radial projection for completeness.