The A$1.37 billion Laminaria-Corallina project began in 1999.
It has the ability to produce oil through eight wells connected to one of the world's largest floating production, storage and offloading vessels (Northern Endeavour) which can produce up to 180,000 barrels of oil a day and can hold 1.4 million barrels.
The fields were originally developed on reserves of about 200 million barrels.
