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Is Assam famous for petroleum or coal?

Assam has abundant mineral resources coal, petroleum, limestone and natural gas are the principal mineral resources. It is also the largest producer of crude oil in India. Other minor minerals include magnetic quartzite, silimanites, iron, ore clay and fredspar etc. Oil India Limited (OIL) is the second largest hydrocarbon exploration and production Indian public sector company with its operational headquaters in Duliajan, Assam. India under the adminstrative control of the Ministry of Petroleum and Natural Gas. Assam is a major producer of crude oil and natural gas in India. It was the second place in the world where petroleum was discovered. Asia's first sucessful mechanically drilled oil well was Makum (Assam) way back in 1867. The second oldest oil well in the world still produces crude oil. One of the biggest public sector oil companies in the country. Assam has four oil refineries located at Guwahati, Digboi, Numaligarh, and Bongaigoan with total capacity of 7 MMT

Mumbai High Field is an Offshore Oilfield

 Mumbai High Field

Bombay High is an offshore oilfield on the Arab Sea, some 160 kilometres west of the Mumbai Coast, India.




Bombay High is an offshore oilfield on the Arab Sea, about 160 kilometres west of the Mumbai Coast, India. The field, which was founded in 1974, began production by the Oil and Natural Gas Corporation in 1976. (ONGC).

The petroleum field includes two blocks, the High North of Mumbai and the High South Mumbai blocks (MHS). The blocks are divided on the basis of shallow barriers which help to exploit the reserves independently in both locations.

Mumbai High currently stores 1,659 million tonnes of oil (MMt) and produces about 12 Mt per year.

For the second phase of the MHN Redevelopment scheme, approval was given by the ONGC Board in January 2009, followed by the third in June 2014.

Info on the Mumbai High Field discovery

When mapping the Gulf of Cambay between 1964 and 1967, a Russian and Indian team from the seismic exploration vessel Academic Arkhangelsky discovered the Mumbai High area in February 1974.

The discovery of the Mumbai High field, as well as subsequent discoveries of other oil and gas reserves in the western offshore region, has transformed India's oil industry.
Well WO-24-3 made a significant oil discovery in 2018, indicating a potential of approximately 29.74 million metric tonnes of oil equivalent (MMtoe) in the field.

Mumbai High field geology and oil reserves

In Mumbai High field various petroleum and gas tanks are present, such as L-I, L-II, L-II, L-IV, L-V, basement and broken cellar. L-II and LIII are mostly Miocene-age calestone oil reservoirs, also graded in many layers.
Around 1,659 Mt of the total reserves is in place in Mumbai Strong.

Info on the growth of Mumbai's high fields

In the year 2000, ONGC revealed its intention to rebuild Mumbai High Ground. It expected to spend Rs90 billion ($200 million) on the project over five years. The strategy was split into two sections. The first period began in the year 2000 and ended in December 2006.

By 2030, 73 new wells and ten sidetrack wells are projected to produce an additional 23.25 million tonnes of crude oil and 6.10 billion cubic metres (bcm) of gas.

In the year 2000, ONGC revealed its intention to rebuild Mumbai High Ground. It expected to spend Rs90 billion ($200 million) on the project over five years. The strategy was split into two sections. The first period began in the year 2000 and ended in December 2006.

By 2030, 73 new wells and ten sidetrack wells are projected to produce an additional 23.25 million tonnes of crude oil and 6.10 billion cubic metres (bcm) of gas.

“The latest MHN process hubs organise the MHN field's gas lift pipelines and oil export lines.”
Until March 2008, total oil output from phase one redevelopment wells was 9.34MMt, and total gas production was 2.89Bcm.

In 1985, the Mumbai High field achieved its peak output rate of 400,000 barrels of oil per day (bopd), which it maintained until 1989.
A redevelopment plan was needed due to a drop in oil and gas output. In 2001, production had dropped to 220,000bopd and ten million metric standard cubic metres of gas per day (Mmscmd).
ONGC spent Rs80 billion ($178.4 million) in phase one to improve productivity and monitor the fall in oil and gas production. During phase one, 29 percent of the total reserves of 1,659 MMt were increased.

Pipelines

In April 2007, ONGC gave its approval for the building of seven pipelines with risers and associated top-side facilities in MHN. These pipelines are crucial for retaining Mumbai High's full performance.

Production from Mumbai High Field

Mumbai High Field achieved its peak output volume in 1998 at 20MMt per year. Together with its neighbouring fields, it developed at a rate of 12.8Mmscmd of gas prior to recent reconstruction projects. Output amounted to approximately 265,000 barrels, with an average of 63 per cent of the water cut and an average of 1,200 barrels of liquid and well produced in 2007.

The combined output of crude oil, including oil produced as a result of phase one growth, was 140.25Mt until January 2009.

The field is run using the gas lift system, which is a major artificial lift method used for the extraction of oil. Several gas compressors distributed around a variety of process complexes in the field to support a large gas lift network.

As of 2018, average daily crude oil output at Mumbai High Field was 16.9Mt and gas production was approximately 52.32Mmscmd.

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