Abstract

Hazad member of Ankleshwar formation consists of 13 (GS-0 to-GS-12) sand units is one of the prolific sand unit in Gandhar field of Cambay Basin. During middle Eocene sedimentation of Hazad member occurs in a subtidal to intertidal with rapid fluctuation in depositional conditions (Biplab et al.). Due to rapid fluctuation in deposition, sands developed are not quite extensive and thin in nature except GS-4 sand. Mapping the extension of these sand units is a challenge. The study which was carried out in North Gandhar area of Cambay basin is an attempt to bring out the depositional features and its lateral variation from 3D seismic data using principal component analysis (PCA) on spectral decomposition volumes.