Late Laggan-Tormore comes onstream

First gas from Total’s Laggan and Tormore gas and condensate subsea-to-shore development has finally been achieved.

Originally due on stream at the end of 2014, the Laggan-Tormore development, has suffered delays, resulting in massive costs for onshore contractor Petrofac.

The development, in 120-600m water depth, will produce 90,000 boe/d. It is a four-well subsea tie-back via two, 143km-long 18in export pipelines to the new onshore, 500 Mcf/d Shetland Gas Plant. 

It is also due to provide the export infrastructure for two further subsea fields, Glenlivet and Edradour, which Total and Dong partnered to tap back in October 2014, when Dong.

“Laggan-Tormore is a key component of our production growth in 2016 and beyond,” Arnaud Breuillac, President Exploration & Production, said. “The innovative subsea-to-shore development concept, the first of its kind in the UK, has no offshore surface infrastructure and benefits from both improved safety performance and lower costs.”

Last year, Petrofac said its loss on the west of Shetland Laggan Tormore project would reach US$360 million in 2014-2015 amid delays and industrial action.

Petrofac’s role in the field, which had been due on stream in 3Q this year, was engineering, procurement, supply, construction and commissioning of the Shetland Gas Plant - the onshore receiving facility for the project. Petrofac took on the work under an £800 million lump sum contract with operator Total.

The firm has blamed further bad weather on Shetland, north of Scotland, and industrial action by workers. In addition, the firm says it suffered from "low manpower productivity," more rectification and reinstatement work than expected, and sub-contractors failing to deliver in line with agreed scopes, which meant it had to take on more construction responsibility than it would normally.

The Laggan field was discovered in 1986 and Tormore in 2007. Development approval was obtained in early 2010. Following treatment at the gas plant, the gas is exported to the mainland via the Shetland Island Regional Gas Export System (SIRGE) and the condensates are exported via the Sullom Voe Terminal.

A plan for the development of the Edrador and Glenlivet fields was given the green light by UK authorities last March.

Edradour is in about 300m water depth in Block 206/4a, 75km northwest of the Shetlands. The Edradour discovery was put on hold in 2013, due to cost increases, however a reduction plan put it back on track. According to Total, it will now form part of what will be a “new strategic hub” West of Shetland. Edradour is expected to reach a plateau of 17,000boe/d.

Glenlivet is in about 435m water depth in Block 214/30a, 90km northwest of the Shetlands. Total says they are studying the possibility of developing the reservoir with two wells and a 17km production pipeline tied back to the Edradour development.

In October 2014, FMC Technologies won a contract to supply subsea equipment to the Edradour/Glenlivet project, including manifolds and associated connections and controls equipment, wellhead systems, subsea tie back connection equipment and a subsea production tree.

Total E&P UK operates Laggan-Tormore with a 60% interest alongside partners DONG E&P (UK) Limited (20%) and SSE E&P UK Limited (20%).  

Watch Total's video about Laggan Tormore

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