Abstract

3D seismic survey acquired in KG deep water basin has been used for identification and mapping of Gas hydrate deposits and subsequently drilled under NGHP-2 successfully. Conventionally processed seismic data has limitations in reservoir descriptions far as thin bed resolution is concerned. In the present study, the legacy 3D seismic data in the study area was reprocessed in broadband sense by using state of art software for de-signature and de-ghosting (shot and receiver both). Broadband processed data are characterized by sharp and clean wavelets that deliver a significant increase in the frequency bandwidth. It provided significantly improved subsurface images, allowing much detailed interpretation. Broadband processed data has brought out small scale faults within reservoir and some faults are running up to seafloor clearly establishes the continuing melting of hydrates and escaping to the environments. AVO analysis of Pre-stack migrated seismic data demonstrates that bottom simulating reflector (BSR) is showing class III AVO anomaly.