Chevron lets subsea gas compression contract for work offshore Australia

Chevron Australia Pty Ltd. has let a contract to Aker Solutions to provide a subsea gas compression system for Jansz-Io gas field, offshore Western Australia. The award follows completion of the front-end engineering and design (FEED) awarded in 2019. Work starts immediately with delivery expected during 2025.

Jansz-Io, discovered in April 2000, lies some 200 km offshore the northwestern coast of Western Australia at water depths of 1,400 m. Chevron recently reached final investment decision (FID) for the project—a modification of the existing Gorgon development—intended to maintain gas flow from Jansz-Io fields in the Carnarvon basin (OGJ Online, July 2, 2021).

The scope for the Aker work covers engineering, procurement, and construction (EPC) of the all-electric subsea gas compression system. It also includes interface responsibility, and assistance during installation and commissioning. The subsea gas compression system will include a complete compression station with three compressor modules and two subsea pump modules, all-electric control systems and actuators, structures including mud mats, high-voltage electrical power distribution system, several spare modules and equipment and various associated tooling.

The project will be managed from Aker Solutions' headquarters in Fornebu, Norway. Client interface and operational planning will be handled from Perth, Australia.

Chevron is operator of the Gorgon project with 47.333% interest. ExxonMobil and Shell each have 25%. Osaka Gas holds 1.25%, Tokyo Gas holds 1%, and JERA holds 0.417%.

The service provider has booked around 7 billion kroner as order intake in second-quarter 2021 related to the contract.