Limited-aperture CSP gathers used for AVO analysis

Shuang Sun, John C. Bancroft

Traditionally amplitude variation with offset (AVO) is performed on CMP gathers on prestack data. However even if the subsurface has a mild structure, the common midpoint is no longer the common depth point. Thus AVO analysis after prestack migration is desired. The formation of the common-scatterpoint (CSP) gather provides a useful tool for such method.