Abstract

Pre-stack processing, mainly the Time and Depth Migration, have emerged as a very reliable tool for improved imaging of the sub surface. The method is more effective for deeper prospects having geological complexities and lateral velocity variations specially in carbonate build ups. The reliable mapping assumes considerable significance in deepwater exploration due to the fact that such areas are devoid of well data and the cost of drilling the well is extremely high. The Pre-stack Time and Depth Migration has been applied on few 2D lines of the NELP Block of Kerala Konkan Basin of the Western Offshore, India. The present paper describes the methodology, velocity model building and the result of Pre STM and Pre SDM along 3 representative lines namely A,B,C. The result brings out the refinement in the structural features in the zone of interest.