EnQuest plc is an independent United Kingdom

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

-based petroleum exploration and production

Extraction of petroleum

The extraction of petroleum is the process by which usable petroleum is extracted and removed from the earth.-Locating the oil field:Geologists use seismic surveys to search for geological structures that may form oil reservoirs...

 company which operates exclusively in the United Kingdom Continental Shelf. EnQuest shares are included on the main list of the London Stock Exchange

London Stock Exchange

The London Stock Exchange is a stock exchange located in the City of London within the United Kingdom. , the Exchange had a market capitalisation of US$3.7495 trillion, making it the fourth-largest stock exchange in the world by this measurement...

 and the firm holds a secondary listing on Nasdaq OMX Stockholm. The company is a constituent of the FTSE 250 Index

FTSE 250 Index

The FTSE 250 Index is a capitalisation-weighted index consisting of the 101st to the 350th largest companies on the London Stock Exchange. Promotions to and demotions from the index take place quarterly in March, June, September and December...

 as of 7 April 2010.

History

The company was formed in April 2010 by a combination of the demerged

Demerger

Demerger is a form of corporate restructuring in which the an entity's business operations are segregated into one or more components. It is the converse of a merger or acquisition....

 British North Sea assets of Petrofac

Petrofac

Petrofac is an international provider of integrated facilities services to the oil, gas and energy production and processing industries. It is registered in Jersey , with its main corporate office in Jermyn Street, London. In addition it has major offices in Aberdeen, Mumbai, and Sharjah, and a...

 and Lundin Petroleum

Lundin Petroleum

Lundin Petroleum is an independent international petroleum company formed in 2001 and based in Sweden.-History:The company was formed in 2001 following the takeover of Lundin Oil AB by Canadian independent Talisman Energy, Lundin Petroleum AB is a Swedish oil company traded on the Stockholm Stock...

.

Operations

The firm has interests in six oil field

Oil field

An oil field is a region with an abundance of oil wells extracting petroleum from below ground. Because the oil reservoirs typically extend over a large area, possibly several hundred kilometres across, full exploitation entails multiple wells scattered across the area...

s located in the Northern North Sea

North Sea

In the southwest, beyond the Straits of Dover, the North Sea becomes the English Channel connecting to the Atlantic Ocean. In the east, it connects to the Baltic Sea via the Skagerrak and Kattegat, narrow straits that separate Denmark from Norway and Sweden respectively...

, two of which (the West Don and Don Southwest fields) previously formed the Petrofac Energy Developments business unit and have a combined production of 40000 oilbbl/d. The other four (Broom, Heather, Thistle and Deveron) were part-owned by Lundin Petroleum prior to the creation of EnQuest and are capable of producing 24000 oilbbl/d. EnQuest is the operator of each field; its financial interests are as follows:

Field	Working interest
Broom	55%
Don Southwest	60%
Heather	100%
Thistle and Deveron	99%
West Don	27.7%