Independent certifiers Netherland Sewell and Associates, who are expected to provide final confirmation of the figures by the end of June, also increased proved reserves from 477PJ to more than 560PJ.
"We are in this enviable position now as a result of a long and sustained exploration programme starting with the Growth Acceleration Strategy (GAS) in late 2006," QGC managing director Richard Cottee said.
"By June 30, 2009 almost half a billion dollars will have been spent on our exploration of the Walloon Fairway, involving drill stem tests, core holes and pilot testing.
"This is a key step in arriving at a Final Investment Decision (FID) in 2010 for the LNG Project with our alliance partner, BG Group."
Cottee added that QGC had drilled 264 wells since November 2000 with 104 wells being drilled so far this financial year and 200 wells planned for the 2008-09 financial year.
QGC and BG are planning to build a 3-4 million tonne per annum LNG plant at Curtis Island, near Gladstone on the Queensland coast. The plant will use 190PJ per year from QGC's CSM tenements in the Surat Basin.
Pending a final investment decision due in 2010, QGC and BG anticipate the first shipment of LNG from their project in 2013. Export of LNG is expected to continue until at least 2033.
QGC has targeted a gas reserve base of 7000PJ of 2P reserves to supply the project.
