Downstream - Onshore Infrastructure

Processing the Products

Downstream - Onshore Infrastructure

The Wheatstone Project's LNG and domestic gas facility will be located at Ashburton North, near Onslow on the Pilbara coast of Western Australia. The project's downstream engineering, procurement, construction, management (EPCm) contractor is Bechtel - a company that has demonstrated execution experience and proven performance in Australia.

The foundation project will consist of two, 4.45 million tonnes per annum (MTPA) LNG trains plus a 200 terajoule per day domestic gas plant.

Gas and condensate will first arrive via the trunkline into the slugcatcher, where the two products will be separated. Condensate will then be stabilised (volatile gases removed) before it is stored in large tanks ready for export via oil tankers to refineries in Australia and overseas.

Artist’s impression of the Wheatstone Project at Ashburton North.

Artist’s impression of the Wheatstone Project at Ashburton North.

Some gas will be sent to the domestic gas plant, which will process and compress up to 200 terajoules of domestic gas a day for Western Australian markets. This gas will then be exported via a pipeline to the main Dampier to Bunbury Natural Gas Pipeline.

The majority of the Wheatstone gas will be processed by the two LNG trains, where impurities and inert gases will be removed and the natural gas chilled to minus 130 degrees Celsius, at which point it flashes over to a liquid 600 times the density of the natural gas. It is further cooled to minus 161 degrees Celsius and sent to insulated storage tanks to await export overseas via LNG tankers.