Subsea Integration Alliance has bagged integrated subsea engineering, procurement, construction, installation and commissioning (EPCIC) contracts offshore Australia from an ExxonMobil subsidiary.


Image: Subsea Integration Alliance wins EPCIC contracts from Esso Australia. Photo: courtesy of SUBSEA 7.

Under the contracts given by Esso Australia, Subsea Integration Alliance will be responsible for engineering, procurement, construction and installation of two production wells that will be tied-back to the Longford onshore gas plants in South Gippsland, Victoria.

Subsea Integration Alliance is a partnership between OneSubsea, a Schlumberger company, and Subsea 7. The contracts from Esso Australia mark its first integrated subsea project in Australia.

It will combine the expertise of OneSubsea and Subsea 7 in subsea production systems (SPS) and subsea umbilical, riser and flowline (SURF) systems.

The two wells are contained in a water depth of nearly 45m. OneSubsea and Subsea 7 will handle project management and engineering from their local offices in Perth and Melbourne. Offshore installation activities are slated to begin in 2020.

Subsea 7, on its part, will undertake project management, engineering, procurement, construction and installation of the two production wells and also for a single electrohydraulic umbilical from the Barracouta Platform to the West Barracouta drill centre.

Subsea 7 Australia & 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.

“By bringing together complementary technology and expertise, we are able to provide our clients with greater certainty of return on investment and enhanced asset profit potential. This project serves as a step-change of how we work in the region and demonstrates our ability to deliver superior value to the industry.”

OneSubsea’s scope, on the other hand, includes the provision of two vertical monobore on-wellhead production trees, wellheads, controls along with installation and commissioning services.

OneSubsea, Schlumberger 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.”

In October 2018, the OneSubsea and Subsea 7 alliance won an integrated contract from Fieldwood Energy for the deepwater Katmai field development in the Green Canyon 40 in the US Gulf of Mexico.