Esso Australia has awarded integrated subsea engineering, procurement, construction, installation and commissioning (EPCIC) contracts to Subsea Integration Alliance.

The contracts represent the first integrated subsea project for Subsea Integration Alliance in Australia, which comprises OneSubsea, a Schlumberger company, and Subsea 7.

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It combines OneSubsea and Subsea 7’s expertise in subsea production systems (SPS) and subsea umbilical, riser and flowline (SURF) systems.

Under the contract, Subsea Integration Alliance will be responsible for engineering, procurement, construction and installation of two production wells located in a water depth of about 45m. They will be tied back to the Longford onshore gas plants.

OneSubsea president Don Sweet said: “By adopting our supplier-led approach, Esso Australia will leverage our technical specifications, as well as standardised configurable products that will allow for shorter lead times, overall lower system costs, and accelerated first gas production.

“Further, Subsea Integration Alliance’s execution strategy will enable Esso to achieve cost and schedule certainty and reduce interface risk.”

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“This award builds on our relationship with Esso and on the reputation of Subsea Integration Alliance to offer clients a quality-focused project execution.”

OneSubsea and Subsea 7 will offer project management and engineering from local offices in Perth and Melbourne in Australia. Offshore installation activities are scheduled to be carried out in 2020.

Subsea 7 will provide services, including project management, engineering, procurement, construction and installation of two production wells.

Additionally, it will provide a single electrohydraulic umbilical from the Barracouta Platform to the West Barracouta drill centre.

Furthermore, two vertical monobore will be provided by OneSubsea on-wellhead production trees, wellheads, and controls.

The company will also be responsible for installation and commissioning services.

Subsea 7 Australia and New Zealand vice-president Andy Woolgar said: “This award builds on our relationship with Esso and on the reputation of Subsea Integration Alliance to offer clients a quality-focused project execution, with optimised production and improved cost efficiency.”