The Everest gasfield is located in the Central

North Sea The North Sea lies between Great Britain, Denmark, Norway, Germany, the Netherlands, Belgium, and France. A sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the Norwegian Se ...

, east of

Aberdeen Aberdeen ( ; ; ) is a port city in North East Scotland, and is the List of towns and cities in Scotland by population, third most populous Cities of Scotland, Scottish city. Historically, Aberdeen was within the historic county of Aberdeensh ...

Scotland Scotland is a Countries of the United Kingdom, country that is part of the United Kingdom. It contains nearly one-third of the United Kingdom's land area, consisting of the northern part of the island of Great Britain and more than 790 adjac ...

. It lies in the

United Kingdom Continental Shelf The UK Continental Shelf (UKCS) is the region of waters surrounding the United Kingdom, in which the country has mineral rights. The UK continental shelf includes parts of the North Sea, the North Atlantic, the Irish Sea and the English Channel; th ...

blocks 22/9, 22/10a and 22/14a. The gasfield was discovered by

Amoco Amoco ( ) is a brand of filling station, fuel stations operating in the United States and owned by British conglomerate BP since 1998. The Amoco Corporation was an American chemical and petroleum, oil company, founded by Standard Oil Company i ...

in 1982 with first

gas Gas is a state of matter that has neither a fixed volume nor a fixed shape and is a compressible fluid. A ''pure gas'' is made up of individual atoms (e.g. a noble gas like neon) or molecules of either a single type of atom ( elements such as ...

produced in 1993.

Ownership

Until 2009, the field was operated by BP (formerly Amoco). As a result of assets' swap between BP and

BG Group BG Group plc was a British multinational oil and gas company headquartered in Reading, United Kingdom. On 8 April 2015, Royal Dutch Shell announced that it had reached an agreement to acquire BG Group for $70 billion, subject to regulatory an ...

in 2009, BG Group became the largest stakeholder of field with 80.46% interest and it took over operatorship of the field. Other partners beside of BG Group are Amerada Hess, and Total. The 1.0134% interest, which was owned by

ConocoPhillips ConocoPhillips Company is an American multinational corporation engaged in hydrocarbon exploration and production. It is based in the Energy Corridor district of Houston, Texas. The company has operations in 15 countries and has production in t ...

, was acquired by BG Group in 2007. On 1 November 2017 Chrysaor announced they had acquired a 100 per cent equity interest in the Everest Field, together with interests in the Beryl, Buzzard, Elgin-Franklin, Erskine, Armada, J Block, Lomond and Schiehallion fields.

Infrastructure

The field is named after

George Everest Sir George Everest, (, ; 4 July 1790 – 1 December 1866) was a British surveyor and geographer who served as Surveyor General of India from 1830 to 1843. After a military education, Everest joined the East India Company and arrived in I ...

. There is a permanent production installation, North Everest, in the Northern area of the field (located : water depth) containing 11 surface wells drilled from the platform. A flowline connects to two subsea wells in the South Everest area 7.1 km south of the North Everest installation and a further flowline connects to two subsea wells in the Everest East Expansion area 6.8 km north east of the installation. The manned North Everest platform, built by Highland Fabricators, is a combined wellhead/production/quarters platform receiving and treating well fluids. There is accommodation for 80 personnel. The North Everest platform is connected to the unmanned CATS (Central Area Transmission System) Riser platform by a metal bridge. The CATS Platform is the location for the starting point of the CATS pipeline, which transmits gas from Everest and a number of others including Lomond and Armada, to the CATS terminal at

Teesside Teesside () is an urban area around the River Tees in North East England. Straddling the border between County Durham and North Yorkshire, it spans the boroughs of Borough of Middlesbrough, Middlesbrough, Borough of Stockton-on-Tees, Stockton ...

. Condensates and liquids from North Everest are routed to Cruden Bay via Forties oilfield. Everest contains two main reservoirs: the Palaeocene Forties sandstone and the deeper Paleocene Andrew sandstone. The structure is a 3 way dip closure with a stratigraphic pinchout to the east.

Operations

Everest well fluids are routed to the vertical HP (High Pressure) Separator where condensate is separated from the gas stream.Overall Process Flow Diagram (1990) Wells may also be routed to the vertical test separator where 3-phase (Gas/Condensate/Water) separation and measurement of each stream takes place. Gas from the HP Separator (and the Test Separator) is cooled by cooling medium and flows to the vertical TEG Contactor Scrubber where condensate is recovered. The gas is heated with heating medium prior entering the base of the TEG Contactor where it is in counter-current contact with

triethylene glycol Triethylene glycol, TEG, or triglycol is a colorless odorless viscous liquid with molecular formula HOCH2CH2OCH2CH2OCH2CH2OH. It is used as a plasticizer for vinyl polymers. It is also used in air sanitizer products, such as "Oust" or "Clean an ...

. The dried gas flows to the Dense Phase Suction Scrubber where any recovered liquids are removed. A side stream of

fuel gas Fuel gas is one of a number of fuels that under ordinary conditions are gaseous. Most fuel gases are composed of hydrocarbons (such as methane and propane), hydrogen, carbon monoxide, or mixtures thereof. Such gases are sources of energy that c ...

for the installation is taken from the Dense Phase Separator. The main gas stream is compressed in the Dense Phase Compressor to c. 140 bar. The gas is metered prior to export across the bridge to the CATS Riser platform and through the CATS pipeline. In later field life, as well pressures declines, further lower pressure compressors were installed between the HP Separator and the TEG Contactor Scrubber. The gas compression capacity is at

standard pressure Standard temperature and pressure (STP) or standard conditions for temperature and pressure are various standard sets of conditions for experimental measurements used to allow comparisons to be made between different sets of data. The most used ...

. Condensate from the HP Separator and the Test Separator is routed to the horizontal IP (Intermediate Pressure) Separator where 3-phase separation takes place. Vapour is routed to the MP Vapour Recovery Compressor and thence to the TEG Contactor Scrubber. Separated water is routed to the Produced water system for oil removal prior to overboard disposal. The produced water system has a capacity of per day. Condensate from the IP Separator is heated and routed to the LP (Low Pressure) Separator where further 3-phase separation takes place. Vapour is cooled with cooling medium and flows to the LP Vapour Recovery Suction Scrubber where further condensate is removed. Vapour from the LP Vapour Recovery Suction Scrubber is compressed in the LP Vapour Recovery Compressor and after cooling is routed to the MP Vapour Recovery Compressor. Condensate from the LP Separator is cooled and routed to the Condensate Surge Drum. From the Surge Drum condensate is metered and exported to the Forties Field via the Pipeline Pumps. The condensate export capacity is per day.

References

{{Reflist

External links

Everest (BG website)
Natural gas fields in the United Kingdom Oil and gas industry in Scotland North Sea energy BP oil and gas fields Amoco

Ownership

Infrastructure

Operations

See also

References

External links