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CH2M scoops Tortue pre-FEED deal

KBR hands compatriot player contract to work on elements of BP and Kosmos’ FLNG project off Africa

US company CH2M has won a marine engineering support deal from compatriot contractor KBR for BP and Kosmos Energy’s planned Tortue gas project off Senegal and Mauritania.

CH2M has been awarded the preliminary pre-front-end engineering and design deal that includes looking at the inshore hub, support of marine operations and project execution planning of the planned floating liquefied natural gas development.

The subcontractor said its work would help support a final investment decision on Tortue, which partners BP and Kosmos have said is seen next year.

CH2M practice director Colin Skipper said: "CH2M has a strong civil and marine works portfolio for global energy producers, and we are pleased to perform a critical role working with KBR on this technically challenging project for BP. Delivering this project requires deep technical experience and innovative thinking--qualities on which our reputation has been built."

Upstream reported in March that KBR was in line for the FEED work, after completing the pre-FEED job. KBR confirmed the six-month FEED award in mid-August. The company will look at the design of the subsea structures, pre-treatment floating production, storage and offloading unit, the inshore hub/terminal and interfaces for the FLNG elements of the development, which straddles the maritime border between Mauritania and Senegal.

In late August the partners completed drillstem testing of the Tortue-1 well, flowed it at a sustained though equipment-constrained rate of 60 million cubic feet per day during an extended flow period with minimal pressure drawdown.

BP farmed into Kosmos’ acreage off Senegal and Mauritania last year, with the pair quickly hatching a preferred plan for Tortue comprising a scaled, modular floating LNG development.

They have set their sights on sanctioning the initial Tortue development next year, with first gas seen in 2021.

The initial phase, with a 2.5 million tonnes per annum floater, is set to cost around $2 billion, with a second similar-size floater seen up and running some two years after the first. A tender process on the first floater is already under way.

Tortue has estimated recoverable gas resources of some 15 trillion cubic feet of gas, with the wider 33,000 square-kilometre acreage possibly holding multiples of that.