BEIJING, Dec 26 - PetroChina (601857.SS)(PTR.N) (0857.HK), China's top oil firm, has found more than 200 million tonnes, or 1.46 billion barrels of proven oil reserves this year in its Daqing oilfield, local media reported on Thursday.
Daqing, China's largest field by output, has also added 100 million tonnes of "controlled reserves" and more than 200 million tonnes of "prospective reserves" in 2008, Daqing Daily reported, sourcing Daqing Oilfield Company.
But it did not say whether the proven reserve figures had been endorsed by the Ministry of Land and Resources, which provides government certification of oil and reserve data.
Chinese government and industry estimates of oil and gas reserves often differ significantly from those in the West, which are governed by strict definitions that make clear how much of a field's oil is expected to be produced over its lifetime.
Daqing oilfield, which provides nearly a quarter of the country's annual oil output, added 100 million tonnes of proven oil reserves and 101.5 billion cubic meters of proven natural deposits in 2007.
The field was struggling to stave off a decline in output after decades of production.
Crude oil output in Daqing was 41.70 million tonnes in 2007, down 3.7 percent from a year earlier.
Daqing, China's largest field by output, has also added 100 million tonnes of "controlled reserves" and more than 200 million tonnes of "prospective reserves" in 2008, Daqing Daily reported, sourcing Daqing Oilfield Company.
But it did not say whether the proven reserve figures had been endorsed by the Ministry of Land and Resources, which provides government certification of oil and reserve data.
Chinese government and industry estimates of oil and gas reserves often differ significantly from those in the West, which are governed by strict definitions that make clear how much of a field's oil is expected to be produced over its lifetime.
Daqing oilfield, which provides nearly a quarter of the country's annual oil output, added 100 million tonnes of proven oil reserves and 101.5 billion cubic meters of proven natural deposits in 2007.
The field was struggling to stave off a decline in output after decades of production.
Crude oil output in Daqing was 41.70 million tonnes in 2007, down 3.7 percent from a year earlier.
