Petromin said the heads of agreement was also signed by Canada's InterOil, which owns the Elk-Antelope gas field—the planned feedstock source for the LNG project.

However, an InterOil spokesman said InterOil was not involved in the agreement, which was a direct arrangement between Petromin and CNOOC.

Petromin said the agreement was signed on 15 April in Beijing in the presence of Chinese Premier Wen Jiabao and PNG's Prime Minister Sir Michael Somare.

The