Development

Ormen Lange is a field in the southern part of the Norwegian Sea, 120 kilometres west-northwest of the Nyhamna processing plant. The water depth varies from 800 to more than 1100 metres. Ormen Lange was discovered in 1997, and the plan for development and operation (PDO) was approved in 2004. Deep water and seabed conditions made the development very challenging and triggered development of new technology. The field has been developed in several phases. The development comprises four 8-slot subsea templates with a total of 24 production wells. The production started in 2007 from two subsea templates in the central part of the field. In 2009 and 2011, two additional templates were installed in the southern and northern parts of the field, respectively. An amended PDO for subsea gas compression was approved in 2022.

Reservoir

Ormen Lange produces very dry gas and small amounts of condensate from Paleocene sandstone in the Egga Formation. The reservoir is at a depth of 2700-2900 metres below sea level and has excellent quality.

Recovery strategy

The field is produced by pressure depletion.

Transport

The well stream is transported in two multiphase pipelines to the Nyhamna terminal for processing. Gas is exported via the Langeled pipeline and Sleipner to Easington in the UK. Condensate is exported by ship from Nyhamna.

Status

The production from Ormen Lange is declining, and increased recovery is a key focus. Subsea gas compression is currently being installed.