Abstract

In recent years, the search for hydrocarbon reservoirs has moved into deep and ultra deep waters in East and West coast of India, especially in East Coast encouraged by the recent Gas finds in the region. Complex depositional environment in deep water calls for most advanced imaging tools to reduce the huge economic risk. Prestack time/depth migration (PSTM/PSDM) is most widely used tools for subsurface imaging. PSTM has now become routine processing and major building block for PSDM processing. For PSTM processing and ultimate quality of the processed output, appropriate RMS velocity field is very crucial. Residual moveout analysis is the basic step in velocity field refinement.