Ormen Lange

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Ormen Lange Nyhamna

For other uses, see Ormen Lange (disambiguation).

Ormen Lange is the largest natural gas field under development in Norwegian continental shelf. The field is situated 120 kilometres northwest of Kristiansund, where seabed depths vary between 800 and 1,100 metres. The reservoir is approximately 40 kilometres long and 8 kilometres wide and lies about 3,000 metres below sea surface. Proven gas reserves reach 397 billion m³.

Total cost is estimated to reach 66 billion Norwegian kroner by the time of completion. This equivalates to about 10 billion USD

1 Natural conditions
2 Concepts and solutions
3 Ownership and operators
4 Other uses
5 See also
6 External links

[edit] Natural conditions

Extreme natural conditions at the site (subzero temperatures most of the year, stormy seas, strong underwater currents, uneven seabed) put great demands on the technology used in the project. The Storegga Slides that occurred in the area 7000 years ago have been investigated, with the conclusion that the risk of reoccurrence is negligible.

[edit] Concepts and solutions

The Ormen Lange field will be developed without using conventional offshore platforms. Instead, 24 subsea wellheads in four seabed templates on the ocean floor are connected directly by two 30 inch pipelines to an onshore process terminal at Nyhamna. After processing the gas will be exported by the world's longest subsea export pipeline - Langeled pipeline - approximately 1200 km from Nyhamna to Easington in England. The northern section of the export pipeline will have a diameter of 42 inches, and the section from Sleipner to Easington will have a diameter of 44 inches. Production should start in October 2007. The field will produce 70 million m³ of natural gas per day. Gas from Ormen Lange will be able to meet up to 20 percent of Britain’s gas demand, for up to 40 years.