The Everest gasfield is located in the Central
North Sea
The North Sea lies between Great Britain, Norway, Denmark, Germany, the Netherlands and Belgium. An epeiric sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the Norwegian S ...
, east of
Aberdeen
Aberdeen (; sco, Aiberdeen ; gd, Obar Dheathain ; la, Aberdonia) is a city in North East Scotland, and is the third most populous city in the country. Aberdeen is one of Scotland's 32 local government council areas (as Aberdeen City), ...
,
Scotland
Scotland (, ) is a country that is part of the United Kingdom. Covering the northern third of the island of Great Britain, mainland Scotland has a border with England to the southeast and is otherwise surrounded by the Atlantic Ocean to th ...
. 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 fuel stations operating in the United States, and owned by BP since 1998. The Amoco Corporation was an American chemical and oil company, founded by Standard Oil Company in 1889 around a refinery in Whiting, Indiana, a ...
in 1982 with first
gas
Gas is one of the four fundamental states of matter (the others being solid, liquid, and plasma).
A pure gas may be made up of individual atoms (e.g. a noble gas like neon), elemental molecules made from one type of atom (e.g. oxygen), or ...
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
Hess Corporation (formerly Amerada Hess Corporation) is an American global independent energy company involved in the exploration and production of crude oil and natural gas. It was formed by the merger of Hess Oil and Chemical and Amerada Petr ...
, 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 ...
, 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
Colonel Sir George Everest CB FRS FRAS FRGS (; 4 July 1790 – 1 December 1866) was a British surveyor and geographer who served as Surveyor General of India from 1830 to 1843.
After receiving a military education in Marlow, Everest joined ...
. There is a permanent
production installation, North Everest, in the Northern area of the field (located : water depth) containing 11 surface
wells
Wells most commonly refers to:
* Wells, Somerset, a cathedral city in Somerset, England
* Well, an excavation or structure created in the ground
* Wells (name)
Wells may also refer to:
Places Canada
* Wells, British Columbia
England
* Wel ...
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
Armada is the Spanish and Portuguese word for naval fleet, which also adopted into English, Malay and Indonesian for the same meaning, or an adjective meaning 'armed'; Armáda () is the Czech and Slovak word for armed forces.
Armada may also refe ...
, to the CATS terminal at
Teesside
Teesside () is a built-up area around the River Tees in the north of England, split between County Durham and North Yorkshire. The name was initially used as a county borough in the North Riding of Yorkshire.
Historically a hub for heavy manu ...
. Condensates and liquids from North Everest are routed to Cruden Bay via
Forties oilfield
The Forties Oil Field is the second largest oil field in the North Sea, after the Clair oil field, which is located 110 miles east of Aberdeen. It was discovered in 1970 and first produced oil in 1975 under ownership of British Petroleum, now ca ...
.
[
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 Transparency and translucency, 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, ...
.fuel gas
Fuel gas is any one of a number of fuels that under ordinary conditions are gaseous. Most fuel gases are composed of hydrocarbons (such as methane or propane), hydrogen, carbon monoxide, or mixtures thereof. Such gases are sources energy tha ...
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.standard pressure
Standard temperature and pressure (STP) are standard sets of conditions for experimental measurements to be established to allow comparisons to be made between different sets of data. The most used standards are those of the International Union ...
.
See also
List of oil and gas fields in the North Sea
Forties oil field
The Forties Oil Field is the second largest oil field in the North Sea, after the Clair oil field, which is located 110 miles east of Aberdeen. It was discovered in 1970 and first produced oil in 1975 under ownership of British Petroleum, now ca ...
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