ABERDEEN --Total E&P UK has started basic engineering studies for its Laggan-Tormore project west of Shetland.
The Laggan and Tormore fields provide one of the UK's largest undeveloped gas resources. Total's project will establish major new subsea pipeline and onshore gas processing infrastructure in the region.
A joint venture of Doris Engineering and its 50% owned subsidiary in London, Offshore Design Engineering (ODE) are managing the basic engineering program. The scope covers the overall development facilities, including subsea production equipment, flowlines, umbilicals, the onshore treatment plant, and the export pipeline.
Laggan and Tormore are 125 km (77.7 mi) west of the Shetlands Islands in 600 m (1,968 ft) water depth. The gas will be developed via up to eight subsea wells and two subsea production systems, around 16 km (9.9 mi) apart.
The wells will be linked via two 125-km, 18-in. (45.7-cm) production flowlines to the new gas processing plant on mainland Shetland. There will also be a 125-km methanol injection line and control umbilical.
Treated gas will be exported through a new 234-km (145-mi) trunkline to an offshore tie-in point close to Total's recently decommissioned MCP01 platform and the Frigg UK pipeline. Thereafter it will head southwest through the Frigg system to the St Fergus reception complex, north of Aberdeen.
First gas is scheduled to flow in 2013/14.