Abstract

We present a case study which describes a sub-basalt imaging project in the Gulf of Kutch. The objective of the project was to improve the seismic imaging of Mesozoic sediments lying beneath the Deccan Trap basalts. As the earlier processing attempts were unable to bring out sufficient resolution of the structure so to improve confidence in the interpretation ahead of a further phase of exploration drilling a detailed study was commissioned which included seismic modelling, re-processing of the two available surveys from field tapes, velocity modelling and pre-stack depth migration using the very latest algorithms including Beam and Reverse Time Migration.