The scope of the contract, which also has an option for a third FSU installation, includes pre-installation of mooring systems, transportation, hook-up and installation of the FSUs in their respective fields.

Located off Norway’s west coast in a water depth of around 350m, the Heidrun field came on stream in 1995.

The field was estimated to contain about 40.1 million cubic metres of oil, 31.3 billion cubic metres of gas and 1.7 million tonnes of natural gas liquids.

The company intends to begin offshore operations at the field in mid-2014.

Located off the UK Continental Shelf (UKCS) in a water depth of 110 meters, the Mariner field is expected to produce some 55,000 barrels of oil per day over the plateau period from 2017 to 2020.

Offshore operations at the field are expected to begin in mid-2015.

EMAS AMC Europe and Africa regional head Svein Haug said, "We look forward to executing and delivering these projects efficiently and safely, and contribute our subsea engineering capabilities for the offshore development of this region."