"Converted from a Suezmax ice class tanker, the FPSO will be deployed in the East Shetland Basin," Petrofac said.

"The Kraken field development is one of the biggest heavy-oil field projects currently under development in the UK Continental Shelf."

Petrofac said the scope of work included developing an integrated risk-based maintenance programme, associated repair/replacement strategies and spares holdings.

"Recognising the potential value and cost savings to be achieved, Plant Asset Management will apply its systematic methodology to rationalise spares holdings with the express aim of ensuring effective cost control when owning, stocking and maintaining equipment spares for the life of the asset," Petrofac said.

"Spares and inventory rationalisation is an area where the business is delivering true value and bottom line impact for its clients."

The FPSO, with nameplate capacity of 80,000 barrels per day of oil and 20 million standard cubic feet of gas, is expected to start producing at the EnQuest Heather-operated Kraken field in 2016.

Petrofac did not reveal the value of its contract win.