Sichuan Province also holds five high-sulfur content (sour) gas fields in the Chuandongbei basin.
In 2007, CNPC awarded a 30-year PSC to Chevron to bring the technically challenging fields online.
Field development has encountered several delays, and initial production has been pushed back to the second half of 2014.
Chevron is building two sour natural gas processing plants with a combined production capacity of 270 Bcf/y.