The top of the Dupuy Formation reservoir is located approximately 2300 m below Barrow Island and is overlain by a thick shale cap-rock seal.
To ensure that the Dupuy Formation was suitable for underground injection of reservoir carbon dioxide, the Gorgon Joint Venture undertook additional drilling, well tests, and seismic surveys prior to making the final investment decision.
[5] An ongoing monitoring program, including observation wells and seismic surveys, will assist in managing the performance of the injected carbon dioxide in the Dupuy Formation.
This project, led by Chevron, has been designed to capture 3.5 Mt of carbon dioxide per annum from Greater Gorgon gas fields and store it in the Dupuy formation beneath the Barrow Island.
A delay until March 2019[10] resulted in a further five million tonnes of CO2 to be released, because: A Chevron report to the State Government released yesterday said start-up checks this year found leaking valves, valves that could corrode and excess water in the pipeline from the LNG plant to the injection wells that could cause the pipeline to corrode.
[12] In March 2019, Chevron announced that carbon capture and storage was delayed by another nine months, which would result in the release of a further 7.9 to 11.1 million tonnes of CO2.