Country India Year of current production of oil 2009 Discovery 1965 | Offshore/onshore Offshore Region Gulf of Khambhat Start of production 1974 | |
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Location off the coast of Mumbai Current production of oil 347,197 barrels per day (~1.730×10^ t/a) Operator Oil and Natural Gas Corporation | ||
Aht s ravensturm working in tapti oil field in bombay high
Bombay High is an offshore oilfield 176 kilometres (109 mi) off the coast of Mumbai, India, in about 75 m of water. The oil operations are run by India's Oil and Natural Gas Corporation (ONGC).
Contents
Bombay High field was discovered by a Russian and Indian oil exploration team operating from the seismic exploration vessel Academic Arkhangelsky during mapping of the Gulf of Khambhat (earlier Cambay) in 1964-67, followed by a detailed survey in 1972. 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.
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", 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. Bombay High has three blocks separated by east-west trending faults, all three with different gas-oil contacts but approximately 1355 m deep.
Production
As of 2004, it supplied 14% of India's oil requirement and accounted for about 38% of all domestic production.
On 27 July 2005, a major fire destroyed the production platform, leaving at least 22 people dead despite rescue measures taken by the Indian Coast Guard. The platform accounted for 110,000 barrels per day (17,000 m3/d), or 15% of India's oil production. Rebuilding this is expected to take upwards of 4 months and estimated to cost around Rs. 1200 crore or US$300 million.
The crude oil extracted from Bombay High is of notably high quality, especially when compared to Middle Eastern crudes. Bombay High crude is characterized by a paraffinic content of over 60%, which contrasts significantly with the 25% paraffin content found in light Arabian crude.
In November 2009, output of Bombay High fields, that accounts for half of the India's domestic oil production, fell 5.3% to 347,197 barrels per day (55,199.9 m3/d).