India's Hydrocarbon Outlook – 2022-2023

36 DGH: 3 DECADES OF UNLOCKING INDIA'S HYDROCARBON POTENTIAL sq. km. shallow water area (upto 400m water depth) and 172,895 sq. km. deepwater area. In the basin, 12 plays are present within Basement, Permian, Mesozoic, Paleocene, Eocene, Miocene(+Biogenic), Pliocene (+Biogenic). Krishna-Godavari (KG) is characterized primarily by siliciclastic shelf margin sediments. The basin is located along the east coast of Indian peninsula, lying between Mahanadi basin in the north and Cauvery basin towards south. The basin is most prospective and largely proven with maximum resources (38% of total offshore), and was known for country’s largest deepwater biogenic gas field. With 2.0 BTOE resource established, proven plays have significant prospective resources. Both deepwater and shallow water are extensively appraised with large-scale datasets, which is an opportunity for intensive exploration of stratigraphic traps, majorly the channelized deposits. Commercial hydrocarbon occurrences spread over a wide stratigraphic horizons ranging from Permian to Pliocene with geographical exploration thrust in the basin has resulted in discovery of large to medium to small-sized oil and gas pools across onland and offshore areas of shallow, deep and ultradeepwaters. It is a dual- rift province with the Late Jurassic rift having resulted in NE-SW trending passive margin basin orthogonally superimposed over the NW-SE trending Pranhita-Godavari basin with Gondwana sediments. The KG basin consists of sediments with thickness of more than 7,000m, ranging in age from the Early Permian to Recent. The basin’s onland part is mostly covered by the alluviums deposited by the two major river systems, viz., Godavari and Krishna and several stratigraphic sequence including Lower Gondwanas that are outcropped near the basin margin. The reservoirs are primarily sandstones with isolated occurrences of limestone and unconventional reservoirs like fractured basalts. Effective source rocks are identified to be the shales of Permian to Eocene. The hydrocarbon accumulations often indicate charging by more than one source. Biogenic reservoirs and gas hydrate deposits have been established in the basin. Krishna-Godavari (KG) is a Category I basin, implying that thebasin has significant commercial discovered inplace, that is to be produced at an optimum level. The basin has an area of 230,000 sq. km. with 31,456 sq. km. onland area, 25,649 1. KRISHNA-GODAVARI (KG) BASIN DGH Internal DGH Archive distribution over onland, offshore including ultradeep bathymetry. Several oil and gas fields have been discovered both onland and offshore with structural, stratigraphic and strati- structural entrapment conditions. The