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Bombay High
Bombay High, also known as Mumbai High, is an offshore oilfield off the coast of Mumbai, India, in about 75 m of water.〔Rao, R.P., and Talukdar, S.N., Petroleum Geology of Bombay High Field, India, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T., editor, AAPG Memoir 30, 1980, Tulsa: American Association of Petroleum Geologists, ISBN 0891813063, p. 487〕 The oil operations are run by India's Oil and Natural Gas Corporation (ONGC).
Bombay High field was discovered by a Russian and Indian oil exploration team operating from the seismic exploration vessel ''Academic Arkhangelsky''〔Rao, R.P., and Talukdar, S.N., Petroleum Geology of Bombay High Field, India, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T., editor, AAPG Memoir 30, 1980, Tulsa: American Association of Petroleum Geologists, ISBN 0891813063, p. 487〕 during mapping of the Gulf of Khambhat (earlier Cambay) in 1964-67, followed by a detailed survey in 1972.〔Rao, R.P., and Talukdar, S.N., Petroleum Geology of Bombay High Field, India, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T., editor, AAPG Memoir 30, 1980, Tulsa: American Association of Petroleum Geologists, ISBN 0891813063, p. 487〕 The naming of the field is attributed to a team from a survey run in 1965 analysed in the Rashmi building in Peddar Road, Cumballa Hill, Bombay. The first offshore well was sunk in 1974.〔Rao, R.P., and Talukdar, S.N., Petroleum Geology of Bombay High Field, India, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T., editor, AAPG Memoir 30, 1980, Tulsa: American Association of Petroleum Geologists, ISBN 0891813063, p. 487〕
Every oil resource rock requires Structural traps which are mainly salt dome, coral reefs, fault trap and fold trap. In case of Bombay High, the structure is a "north-northwest to south-southeast trending doubly plunging Anticline with a faulted east limb", 65 km long and 23 km wide",〔Rao, R.P., and Talukdar, S.N., Petroleum Geology of Bombay High Field, India, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T., editor, AAPG Memoir 30, 1980, Tulsa: American Association of Petroleum Geologists, ISBN 0891813063, p. 487〕 and is the most probable reason to call it "Bombay High".
==Geology==
This is a carbonate reservoir, the main producing zone, L-III, consisting of sedimentary cycles of lagoonal, algal mound, foraminiferal mound and then coastal marsh, capped by a post-middle Miocene shale.〔Rao, R.P., and Talukdar, S.N., Petroleum Geology of Bombay High Field, India, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T., editor, AAPG Memoir 30, 1980, Tulsa: American Association of Petroleum Geologists, ISBN 0891813063, p. 504〕 Bombay High has three blocks separated by east-west trending faults, all three with different gas-oil contacts but approximately 1355 m deep.〔Rao, R.P., and Talukdar, S.N., Petroleum Geology of Bombay High Field, India, in Giant Oil and Gas Fields of the Decade:1968-1978, Halbouty, M.T., editor, AAPG Memoir 30, 1980, Tulsa: American Association of Petroleum Geologists, ISBN 0891813063, pp. 500 and 503〕
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