The Equus gas condensate field development, led by Australian independent Equus Energy, is set to be the first project to deploy a Sevan cylindrical FPSO in Australian waters. Pre-FEED studies confirm the project is technically feasible, commercially robust, and capital efficient, validating development pathways to commercialize certified contingent resources of 1.7 trillion cubic feet of gas and 38 million barrels of condensate.

Development Options and Infrastructure

Two viable development options were evaluated: a tie-back to Woodside Energy's Pluto offshore infrastructure, providing access to Pluto LNG Train 1, the Karratha Gas Plant via the Pluto-KGP interconnector, and the domestic gas market via the Dampier to Bunbury Natural Gas Pipeline; or a tie-back to Santos-operated offshore infrastructure and processing at Varanus Island gas plant, with onward LNG market access via existing North West Shelf infrastructure and domestic market access via the DBNGP. Utilizing existing infrastructure with spare capacity materially reduces development complexity, capex requirements, and execution risk versus greenfield alternatives.

FPSO Selection and Rationale

The project's centrepiece will be a leased floating production, storage, and offloading vessel, described as the most capital efficient model. The Sevan cylindrical FPSO was selected due to its adaptability to cyclonic and large ocean conditions off the North West Shelf. It allows permanent mooring and provides much higher uptime and revenue, with cost savings versus traditional FPSOs as there is no turret to connect to risers on the seabed.

Production and Market Details

The initial development envisages gross production of approximately 350 million cubic feet per day of gas from up to five vertical subsea wells linked to the leased FPSO. Stabilised condensate would be directly offloaded via a tanker. The development concept translates to production of some 2 million tonnes per annum of LNG and around 12,000 barrels per day of condensate at start-up, with some 50 terajoules per day of gas supplied to the Western Australian domestic market. The project is deemed capable of supplying both LNG export markets and meeting around 5% of WA's current gas demand.

Project Timeline and Commercial Structure

The company is advancing into partnering, financing, and approvals ahead of moving into the FEED phase in 2027, paving the way for a final investment decision. Equus is looking to sell down some of its interest as it advances the project. No timeline for production start-up was provided, though LNG volumes for Asian markets are expected to be priced at US$6 per million British thermal units. The Equus field has a 15-year project life based on existing certified resources.

Regulatory and Environmental Status

The Australian operator already has conditional consent from the WA state government to export 85% of Equus' gas, with the remaining 15% committed to the domestic market. Existing baseline environment studies and stakeholder consultation provide a solid foundation for preparation and submission of the offshore project proposal.