Tests at exploration well Qilibei-1, within the Qilibei structure, showed daily gas flows of 800,000 cubic meters.
The company said it hopes the Qilibei structure has the potential to be developed into a major gas field.
Gas reserves at Qilibei are estimated at 35 billion cubic meters.
Qilibei is located next to Luojiazhai, a big gas field under the management of CNPC's listed unit, PetroChina Co.
Proven reserves at Luojiazhai are over 58 billion cubic meters. Daily gas output at test wells Luojia-11H and Luojia-16H-1 are 3 million cubic meters and 2.6 million cubic meters, respectively.
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