Abstract

Pre-stack merging of 10 vintages of overlapping 3D seismic data of 632 sq. km acquired in several field seasons using different equipment and different orientations of acquisition geometry. The datasets were processed earlier individually. Understanding the strati- structural features of the pay sands within Bokabil Upper and Middle Bhubans, delineation of the pay sands and understanding the areal extent of the pay units in totality was main objectives of the project. Sta rting with geometry merged gather, pre-stack merging in a master grid was carried out. The exercise involved stage wise QC of individual vintages in addition to those in master grid. The complete data was subjected to 3D Pre-stack Time Migration (PSTM) using Kirchoff