PetroChina (NYSE: PTR), Asia’s largest oil and gas producer, plans to add 12 production wells this year at the Kelasu gas field in China’s Tarim basin and raise production capacity at the field by 1.2 billion cubic meters (Bcm), state news agency Xinhua said on April 18.

Kelasu is one of the seven main gas fields in the Tarim basin in the northwestern region of Xinjiang, with a total supply capacity of 25 Bcm, which is equivalent to 17% of China’s total gas output.

PetroChina plans to add a total of 7 Bcm production capacity at Kelasu by 2020.

Gas production in China is forecast to climb 6% to 8% per year through 2020, after growing at its fastest pace in four years in 2017 to cover a demand surge spurred by the government’s gasification drive.