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China's combined oil and gas output will exceed 600 million tonnes of oil equivalent in 2030, due to substantial increases in geological resources in the country's northeastern region.

Oil output is expected to exceed 250 million tonnes in 2030, with gas output likely reach 450 billion cubic meters, Peng Qiming, director of the geological exploration department at the Ministry of Land and Resources, said Thursday.

Peng said geological oil resources in the country's northeast areas reached 22.5 billion tonnes at the end of 2011 with recoverable resources standing at 7.2 billion tonnes, up 5.7 billion tonnes and 1.3 billion tonnes, respectively, from 2007.

The areas' geological gas resources jumped 127 percent last year from  2007 levels, he said.

China, one of the world's largest energy users, added 11.22 billion tonnes of oil reserves and 5.8 trillion cubic meters of gas reserves during the past decade.

The country's annual oil output rose to 203 million tonnes in 2011 from 160 million tonnes in 2002, and its gas output increased to 101.3 billion cubic meters last year from 22.9 billion cubic meters ten years ago.