China Petrochemical Corp has agreed to pay $1.1 billion (Dh4 billion) to increase its stake in an Australian liquefied natural gas development led by Conoco-Phillips and Origin Energy.

Sinopec Group signed a binding accord to boost its holding in the Australia-Pacific LNG venture to 25 per cent from 15 per cent, Sydney-based Origin said yesterday in a statement. The state-owned Chinese company will buy a further 3.3 million metric tonnes of LNG annually for 20 years, taking its total commitment to 7.6 million tonnes a year.

China plans to more than double its natural gas consumption to cut its dependence on coal and oil. With the completion of the Sinopec Group deal initially announced last month, China has contracts to purchase more than 18 million tonnes of Australian LNG annually, Energy Minister Martin Ferguson said.

"Any number that doubles in China is a huge number," Origin Managing Director Grant King said. "The diagnosis is for robust growth in demand."