The Eider Oilfield is situated north east of

Lerwick Lerwick (; non, Leirvik; nrn, Larvik) is the main town and port of the Shetland archipelago, Scotland. Shetland's only burgh, Lerwick had a population of about 7,000 residents in 2010. Centred off the north coast of the Scottish mainland ...

Shetland Islands Shetland, also called the Shetland Islands and formerly Zetland, is a subarctic archipelago in Scotland lying between Orkney, the Faroe Islands and Norway. It is the northernmost region of the United Kingdom. The islands lie about to the no ...

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 the ...

, in block numbers 211/16a and 211/21a. It is operated by Abu Dhabi National Energy Company (TAQA). It was discovered in May 1976 in a water depth of . Estimated recovery is of oil. The production is via the North Cormorant platform to the

Brent System The Brent System pipeline transports oil from the North Sea oilfields via Cormorant Alpha to the Sullom Voe Terminal in Shetland, Scotland. Since 3 August 2009, it is operated by Abu Dhabi National Energy Company replacing the previous oper ...

pipeline. Production ceased in January 2018, at which point the platform was converted to a utility for the Otter oil field providing provide power, chemical and system support.

Topsides facilities

The topsides for Eider were designed by Matthew Hall EngineeringMatthew Hall Engineering publicity brochure n.d. but c. 1990 which was awarded the contract in October 1984. Initially there were facilities for 7 oil production wells, 7 water injection wells and ten spare slots. The production capacity was 53,000

barrels A barrel or cask is a hollow cylindrical container with a bulging center, longer than it is wide. They are traditionally made of wooden staves and bound by wooden or metal hoops. The word vat is often used for large containers for liquids, u ...

of oil per day. There was a single production train with a single separator operating at a pressure of 13–28 barg. Crude oil from the separator was treated in a crude oil coalescer to remove produced water prior to export. Well fluids from the Otter field were initially separated in the Otter Separator with liquids passed to the Eider Production Separator. Gas from the Otter and Eider separators was used as fuel gas and purge gas and the excess was flared. Electricity generating capacity was by three 3 MW generators with a bidirectional subsea cable to North Cormorant. The topside accommodation was for 76 people. The integrated deck had a weight of 5,000 tonnes. The platform was fabricated by Highlands Fabricators at Nigg Bay and was installed in May 1988.

References

{{DEFAULTSORT:Eider Oilfield Environment of Shetland North Sea oil fields Oil and gas industry in Shetland Oil fields of Scotland