Chevron Australia has reached a final investment decision (FID) on the Gorgon Stage 3 development, committing approximately A$3 billion (US$1.98 billion) to extend the life of the major natural gas project located off the northwest coast of Western Australia.

The Stage 3 backfill project will tie the offshore Geryon and Eurytion gas fields in the Greater Gorgon Area into the existing subsea infrastructure and processing facilities on Barrow Island. The work includes installing three subsea manifolds, a 35-kilometre production flowline, and drilling six development wells in water depths of around 1,300 metres.

Balaji Krishnamurthy, President of Chevron Australia, stated that the project will help sustain production at Gorgon, ensuring continued supply of domestic natural gas to Western Australian households and industry, as well as liquefied natural gas (LNG) to customers across Asia.

Krishnamurthy said: "Gorgon is a world-class energy asset which plays a crucial role in supporting the economic development and energy security of millions of people in Australia and across the Asia Pacific region. With the development of the Geryon and Eurytion fields – to join the existing Gorgon and Jansz-Io fields in providing gas supply for the processing facilities – we can continue providing the reliable energy the world needs, maintaining thousands of highly skilled jobs in Australia, supporting regional WA communities and contributing to government revenue."

He further noted: "Gorgon Stage 3 is a cost-competitive development which will optimise existing infrastructure and complement the well-progressed Jansz-Io Compression Project and previously completed Gorgon Stage 2 infill development."

The Chevron-operated Gorgon Project is a joint venture between the Australian subsidiaries of Chevron (47.33%), ExxonMobil (25%), Shell (25%), Osaka Gas (1.25%), MidOcean (1%) and JERA (0.417%). The facility has capacity to deliver up to 300 terajoules per day of domestic gas to the Western Australian market and 15.6 million tonnes per annum of LNG for export.

Barrow Island also hosts one of the world's largest carbon capture and storage (CCS) systems. Since operations began in 2019, more than 11 million tonnes of reservoir CO? have been injected into a deep saline formation approximately two kilometres beneath the island as of May 2025. The CCS system is designed to operate for over 40 years.

Gorgon Stage 3 forms part of the original field development plan and represents the first of several planned subsea tie-backs to maintain long-term production from the Greater Gorgon Area.