OneSubsea Bags Subsea Compression Deal for Ormen Lange

Photo: A/S Norske Shell

OneSubsea, a division of Schlumberger, has secured an engineering, procurement, construction and installation (EPCI) frame agreement from A/S Norske Shell to supply a subsea multiphase compression system for the Ormen Lange field in the Norwegian Sea.

Through the EPCI contract, OneSubsea and its Subsea Integration Alliance partner Subsea 7 will supply and install a subsea multiphase compression system that uses the industry’s only subsea multiphase compression technology.

OneSubsea will, in the first phase of the project, do the engineering and design of the complete system. Following the final investment decision by the license group, the complete scope of the EPCI will be executed.

The compression system will be powered and controlled from the Nyhamna onshore gas processing plant, which is 120 km from the subsea location. This tieback distance is also a world record for transmitting variable speed power from an onshore facility to equipment on the seabed, the company said.

The system will be installed at 850 m of water depth and comprises two 16-MW subsea compression stations tied into existing manifolds and pipelines.

“Our subsea multiphase compression system is a robust, compact and cost-efficient solution that will help Shell unlock the full potential of the Ormen Lange field. Our unique wet gas compression technology can also help customers lower their carbon footprint,” said Don Sweet, president OneSubsea.

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