Abstract

The Kopili formation within the Paleogene sequence has an established reserve base apart from proven limited commercial production in Assam shelf and Dhansiri valley. This study has been necessitated as the prolific oil producing Miocene and Oligocene reservoirs have reached a plateau stage of exploration and the recent setbacks and leads obtained for deeper sands exploration had to be reevaluated. A systematic approach has been adopted to understand the hydrocarbon potential and play of deeper sands in Upper Assam. In the first stage, a regional sequence stratigraphic analysis integrating well data of 71 wells with laboratory data was carried out to establish a broad Geological model for the different system tracts that have been identified within the Kopili formation. As a result of this study, prospective areas were identified and ranked. In the final stage, a detailed study of the most prospective identified area for deeper prospect exploration was carried out integrating well data, geochemical data and 3-D seismic data which has led to a new insight into the hydrocarbon potential of these plays in the area