Subsea 7 Inc has been awarded a $100m contract from StatoilHydro for engineering, procurement, construction and installation of the Troll B Gas Injection project in the Norwegian sector of the .
The Troll B Gas Injection project will be developed with two separate subsea satellite wells, located respectively 3.5 km and 6.5 km south of the Troll B platform. The wells will be connected to the Troll B platform by a single gas injection pipeline and a control umbilical.
Subsea 7’s scope is to engineer, procure, fabricate and install a 6.5 km long 12” rigid pipeline, incorporating in-line and end structures for the connection to the satellite wells, in addition to the control umbilicals. Furthermore, Subsea 7 will install two off 200 tonne satellite structures utilising the heavy lift capabilities of one of its new vessels.
Engineering and procurement activities will commence immediately and will be performed at Subsea 7’s offices in . Fabrication of the pipeline will be carried out in early 2009 at Subsea 7’s new North Sea Spoolbase at Vigra on the north-west coast of . Pipelay operations are due to take place in 2009 and will utilise one of Subsea 7’s specialised reeled pipelay vessels. The remainder of the offshore installation scope, which also involves burial of the umbilical and pre-commissioning activities on the complete pipeline system, will be performed in 2010.
The contract is a call-off of an option under Subsea 7’s existing Troll O2 contract with StatoilHydro.
The Troll field is located in the Norwegian Continental Shelf, approx. 70 km north-west of , in water depths between 300 and 340 m.