The Wheatstone Project's LNG and domestic gas facility is located at Ashburton North, near Onslow on the Pilbara coast of Western Australia. The foundation project consists of two, 4.45 million tonnes per annum (MTPA) LNG trains plus a 200 terajoule per day domestic gas plant.
Gas and condensate first arrives via the trunkline into the slugcatcher, where the two products are separated. Condensate is then stabilised (volatile gases removed) before it is stored in large tanks ready for export via oil tankers to refineries in Australia and overseas.
Once operating, 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 transported via a pipeline to the main Dampier to Bunbury Natural Gas Pipeline.
The majority of Wheatstone's gas is processed by the two LNG trains, where impurities and inert gases are removed and the natural gas is 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 162 degrees Celsius and sent to insulated storage tanks to await export overseas via LNG tankers.