India's Hydrocarbon Outlook – 2022-2023

46 DGH: 3 DECADES OF UNLOCKING INDIA'S HYDROCARBON POTENTIAL Cauvery is a Category I basin, implying that the basin has significant commercial discovered inplace. The basin has an area of 240,000 sq. km. with 37,825 sq. km. onland area, 43,723 sq. km. shallow water area and 158,452 sq. km. deepwater area. In the basin, 9 plays are present within Basement, Jurassic, Cretaceous and Paleocene-to-Miocene. The basin is characterized primarily by siliciclastic shelf margin, sediments, situated southerly along the east coast of Indian peninsula. Basin has significant production from Mesozoic and Basement with deep-to-ultradeep water largely appraised but explored only 2%. Ultradeep exploration opportunity is envisaged in undrilled areas in the northeast and southern part towards Gulf of Mannar. The Cauvery basin is currently under active exploration stage. Commercial hydrocarbon occurrences, besides basement, are encountered in wide stratigraphic sequences within the oldest sediments of Jurassic. Several oil and passive margin basin, with a number of individual rift graben structures forming sub-basins. The basin hosts thick pile of sediments of the order of 8,000m, ranging from Late Jurassic to Recent across onland, offshore including deep and ultradeep areas. The basin’s onland part is mostly covered by the alluvium deposited by the major river system of Cauvery and several stratigraphic sequences including Lower Gondwanas that cropped out along the basin margin areas. The hydrocarbon accumulations often indicate charging from multiple source sequences. Prospectivity The Cauvery basin has a total hydrocarbon inplace of 1,427 MMTOE, out of which 292 MMTOE has been discovered and it includes 5. CAUVERY BASIN DGH Internal DGH Archive gas fields have been discovered with structural, stratigraphic and strati-structural entrapment conditions. Cauvery basin, like other east coast basins of India, is a peri-cratonic, extensional