OneSubsea wins UK North Sea Chevron contracts

July 23, 2013

Newly formed subsea business OneSubsea has picked up a major contract with Chevron on its deepwater west of Shetland Rosebank development.

OneSubsea, a joint venture between Schlumberger and Cameron, is to provide the subsea equipment on the 240MM boe recoverable Rosebank development.

The package will include the engineering, supply, and manufacturing of subsea manifolds, subsea trees and subsea control systems.

Equipment for the development, 130km north-west of the Shetland Islands and in 3600ft of water, will be manufactured in various locations in the UK, including OneSubsea’s facility in Leeds.

Rosebank will be Chevron’s first deep water development in the UK. It was discovered in 2004 and is to be developed using a floating production, storage and offloading vessel.

Chevron recently submitted its Environmental Statement and the Field Development Plan to the UK government for approval.

Hyundai Heavy Industries building the FPSO for the field, under a contract worth about USD$1.9 billion.

The 99,750-tonne turret-moored FPSO is scheduled to be handed over by the end of November 2016, said HHI in April. It will be able to produce 100K bbls and 190MM cu ft of natural gas per day. It will also have storage capacity for 1.05MM bbls.

Chevron operates Rosebank and holds 40% equity interest. Partners are Statoil (30% interest) OMV (20%) and DONG E&P (10%).

OneSubsea has also been awarded a contract with Chevron to design, manufacture and supply two high pressure, high temperature (HPHT) vertical, subsea monobore trees and wellheads for Chevron’s Alder development at its Leeds facility.

The Alder project will be a subsea tie-back to the Britannia bridge-linked platform 160km off Scotland in 492ft of water.

Chevron also announced other contracts on Alder, is a HPHT gas condensate field, which was discovered in 1975.

It said Technip will carry out the detailed engineering, procurement, installation and commissioning of the complete subsea system on Alder, including the main subsea manifold, subsea isolation valve manifold, 28km of pipe-in-pipe flow line, umbilical and tie-in spools. The work will be carried out in Aberdeen, Evanton and Newcastle.

Aker Solutions will design, manufacture and supply the subsea control system for the project, including the hydraulic and electrical components to be installed both at subsea and on the Britannia bridge linked-platform out of Aberdeen.

Chevron said Alder is a technically challenging project that has taken a number of years to bring to economic development through a combination of technology development and commercial conditions. 



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