The company said proven gas reserves at Luojiazhai field were estimated at 58.3 billion cubic metres (bcm).
The company said it planned to produce up to six million cubic metres a day or around 2 bcm a year at Luojiazhai by 2006 for the booming eastern areas of the country.
Sichuan is China's top gas producing area and last year produced around 8.72 bcm of natural gas.