The Chevron Australia joint venture has awarded a $554-million contract to South Korea’s Daewoo Shipbuilding & Marine Engineering for construction of a field control station for the Jansz-Io gas field project in Carnarvon basin offshore Western Australia.
The control station is part of the JV’s $4-billion project to add compression to maintain flow from Jansz-Io fields sending gas to the Gorgon project’s LNG and domestic gas infrastructure on Barrow Island.
The 27,000-tonne control station will be built at the Okpo shipyard in Geoje and is scheduled for completion by third-quarter 2025.
The compression maintenance development project reached final investment decision in July 2021 and is a modification of the existing Gorgon development.
When on location, the control station will be normally unattended. The project also includes about 6,500 tonnes of subsea compression infrastructure and a 136 km-long subsea power cable linked to the three-train, 15.6 million tonnes/year LNG facility on Barrow.
The control station contract follows an award to Aker Solutions in November for subsea umbilicals and an earlier deal to Aker for a subsea compression system.
Chevron awarded a contract to Saipem for transportation and installation activities timed to begin in 2024.
ABB won the order to supply overall electrical power for and Baker Hughes was contracted to supply subsea compression manifold technology.
Construction and installation for the compression project is expected to take 5 years to complete with work beginning in second-half 2022.
This follows Gorgon Stage 2, which is nearing completion to supply gas from four new Jansz-Io and seven new Gorgon wells.
Jansz-Io fields lie 200 km offshore in water depths of around 1,500 m.
Chevron is operator of the Gorgon project with 47.333% interest. ExxonMobil and Shell each have 25%. Other partners are Osaka Gas 1.25%, Tokyo Gas 1%, and JERA 0.417%.