North West Shelf (NWS) executive vice president Kevin Gallagher told a business breakfast in Perth that the development would keep the project on a production plateau.
"It will help us maintain capacity for longer. It's not about expanding the North West shelf," he said of the project.
Gallagher said that the North West Shelf was slowly expanding capacity and produced 16.5 million tonnes of LNG in 2010 up from 16.3