Ashburton North, near Onslow
Lump Sum Deed
April 2012 to fourth quarter 2013
The Chevron-operated Wheatstone Project is one of Australia’s largest resource projects. Located at Ashburton North, 12 kilometres west of Onslow in Western Australia, the Wheatstone Project is a joint venture between the Australian subsidiaries of Chevron, Apache, Kuwait Foreign Petroleum Exploration Company, Shell and Kyushu Electric Power Company. The initial phase of the project will consist of two liquefied natural gas trains with a combined capacity of 8.9 million tonne per annum and a domestic gas plant.
Thiess was engaged on this project to assist in bringing the LNG trunkline to shore with minimal environmental disturbance to the coastal dune system.
Thiess already plays a major role with Chevron on the Gorgon LNG project, through the joint venture with Decmil/Kentz (TDKJV) to design and construct accommodation for the construction workforce on Barrow Island. Thiess has also been awarded the contracts for the earthworks, tanks and MOF Jetty on the Wheatstone Project.
Thiess will construct a 1,216 metre TBM pipe jacked micro-tunnel with an external diameter of 2.5 metre, an internal diameter of 2.0 metre, and also the construction of all support systems for the tunnelling works, which consists of a water treatment plant, slurry plants and sediment ponds.
Thiess will procure a 2.5 metre diameter Herrenknecht TBM model AVND2000AB for the excavation with the jacking pipes being supplied from within Australia for the Wheatstone Shore Crossing project.
Upon completion of this project, the tunnel will connect two offshore gas reserves with Chevron’s greenfield LNG plant at Ashburton North located in the north west of Western Australia near the town of Onslow.