Abstract

Ramnad sub basin, the southernmost onland tectonic block of Cauvery Basin, is a proven hydrocarbon province with five Gas fields producing from siliciclastic reservoirs of upper Cretaceous Nannilam and Bhuvanagiri formations. ? Exploratory drilling of 52 wells till date has established presence of commercial quantities of gas from debris flow sandstones of Senonian age with minor pools in deeper Turonian and shallower Paleocene sequences. The prospectivity of the deeper synrift fill has not been explored fully, as only a few wells have penetrated the deeper Lower Cretaceous / Upper Jurassic? stratigraphic succession