Abstract

Wide Azimuth (WAZ) data acquisition offers better sampling of wavefield compared to narrow azimuth acquisition. Improvements in the spatial sampling helps in better attenuation of the ground roll and other coherent noise and improved data regularization. Azimuth dependent velocity estimation provides insight for the study of anisotropy in the subsurface formations. The difficulty often faced while processing the WAZ data is the inadequacies in the processing using 2D based approaches. Signal and various noise is registered in the 3D sense and hence needs the methods based on 3D. Offset Vector Tile (OVT) based approaches are better suited for the wide azimuth acquisition (Vermeer, Gijs J.O, 1994). 3D Seismic data of Padra area of WON basin was acquired with orthogonal geometry is processed to assess the value addition. Coherent noise attenuation was carried out in a real 3D sense by making cross-spreads. 5D regularization was performed to improve the azimuthal coverage and reduce migration artifacts. An effect of both was realized in gather as well as in stack. Offset Vector Tiles (OVTs) were formed with offset & azimuth dimensions of 60m and 45