India's Hydrocarbon Outlook – 2022-2023

38 DGH: 3 DECADES OF UNLOCKING INDIA'S HYDROCARBON POTENTIAL Mumbai Offshore is a Category I basin, implying that the basin has significant commercial discovered inplace. The basin has an area of 212,000 sq. km. with 118,389 sq. km. shallowwater area and 93,611 sq. km. deepwater area. In the basin, 10 plays are identified within Basement, Tertiary (Mid-Late Miocene, biogenic), Pliocene- Pleistocene (Biogenic). The basin is exclusively offshore and the most prolific petroliferous province of India, contributing nearly half of oil and gas production of the country annually. Mumbai basin is characterized primarily by carbonate- to-siliciclastic shelf margin facies and located along the West Coast of Indian peninsula. Though, the basin has discovered resources of 4.8 BTOE, the deepwater areas are not enough explored and opportunity lies in deepwaters to chase the basinward extension of prospective plays (Paleocene an Eocene). Similarly, Mesozoic plays are still elusive in the basin, hence sub- basalt exploration for Mesozoic play remains an opportunity for deeper exploration (3,000m+). The Mumbai basin is still under active exploration stage. Commercial hydrocarbon occurrences hydrocarbon province but recently biogenic gas has been discovered within shallow plays of strati-structural entrapment. The basin is a peri- cratonic, passive margin rift basin, with individual rift graben set-ups forming many sub-basins. This basin hosts thick pile of sediments, mainly ranging from Paleocene to Recent. The basin extends into areas of both shallow water and deepwater of Arabian sea. Deepest sequence of Basal Clastics of Late Cretaceous to Early Paleocene of Deccan Traps to Pliocene biogenic plays form the petroleum system of the basin. Though northerly located Saurashtra basin and Southerly Kerala-Konkan basin has Mesozoic sequences identified and discovered, the basin has not yet been deeply explored for Mesozoic. Prospectivity The Mumbai Offshore basin has a total hydrocarbon inplace of 7,171 MMTOE, out of which 4,794 MMTOE has been discovered and it includes both commercial and sub-commercial 2. MUMBAI OFFSHORE BASIN DGH Internal DGH Archive spread over the Tertiary stratigraphic interval ranging from the oldest sediments of Paleogene to the youngest sediments of Plio-Pleistocene. Though the basin is a major thermogenic