Abstract

Journey of the Indian Plate through the warm latitudes during Middle Eocene times triggered prolific growth of platform carbonates in the Mumbai Offshore Basin. Known as the Bassein Formation, it is a Second Order Sequence, bound by Sequence Boundaries of CII-30 (Base Mid Eocene) and CII-40 (Base Early Oligocene). The profound impact of CII40 unconformity on the Bassein carbonates is imprinted as distinctive diagenetic belts across the Mumbai Offshore Basin. Earlier work done which defined these zones of differing porosities was derived through analysis of data of over 600 wells. This paper uses the diagenetic model as a template and integrates petrophysical and geophysical methods to corroborate it. A model thus prepared, elucidates the importance of diagenetic analysis in carbonate exploration and becomes a predictive tool to focus on areas with exploration potential in Bassein Formation.