India’s Hydrocarbon Outlook 2024 70 A Report on Exploration & Production Activities 4. CAMBAY BASIN Cambay is a Category I basin, implying that the basin has significant commercial discovered inplace, potential to be produced at an optimum level. The basin is characterized primarily by siliciclastic rift-fill sediments, situated in the western region of Indian peninsula. The basin is endowed with most matured petroleum provices of India with major producing fields and 88% of total hydrocarbons already discovered. The Cambay basin, though enough exploited, is still under active exploration for opening deeper plays. Commercial hydrocarbon occurrences spread over different stratigraphic intervals ranging from the oldest sediments, including Deccan Trap volcanics of Cretaceous-Paleocene to the youngest sediments of Miocene. Several oil and gas fields have been discovered with structural, stratigraphic and strati-structural entrapment conditions, out of which two-third of the discoveries has been made in Middle Eocene. The basin hosts a thick pile of Tertiary sediments, ranging from Paleocene to Recent which is overlying the Deccan Trap. Cambay shale of Paleocene is the major source rock charging Middle Eocene reservoirs of Kalol (north and central) and Hazad (southern) deltaic reservoirs with Tarapur (Oligocene) acting as the regional cap rock. During later exploration, Miocene reservoirs (Babaguru) are proved to be potential reservoirs of oil and gas in southern onland part of the basin and the offshore area that extends into the Gulf of Cambay. Source: DGH Internal Source: DGH Internal Onland sub-basin partially overlaps with the state(s) of Gujarat and Rajasthan.
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