Limited-aperture CSP gathers used for AVO analysis

摘要: Traditionally amplitude variation with offset (AVO) is performed on CMP gathers prestack data. However even if the subsurface has a mild structure, common midpoint no longer depth point. Thus AVO analysis after migration desired. The formation of common-scatterpoint (CSP) gather provides useful tool for such method. METHOD Cheops’ pyramid and Specular energy In seismic modelling an event may be constructed from series scatterpoints. Using 2-D zero-offset forward model (x,t) scatterpoints can modelled by spreading hyperbolas, shape which defined RMS velocity at scatterpoint. Prestack uses 3D surface to recreate reflection in (x,h,t). data (x,h,t) 2D line this volume