The Changling 1 gas field contains 70 billion cubic metres of proven gas reserves, a company official said.
PetroChina, through its subsidiary Jilin Oilfield Company, has submitted a reserves appraisal report on the field to China's Ministry of Land&Resources.
The field covers an area of 449,100 square kilometres in Qiangou county, 160 kilometres north-west of Changchun, the capital of Jilin province.
The discovery well Changshen 1 was drilled in late 2005 and had an initial flowrate of 1.5
