The nation's top oil company PetroChina said yesterday it will extract more resources from its fourth-largest oilfield over the next two years.

Output from Changqing, the oil and gas field located in Northwest China, will reach 30 million metric tons of oil equivalent in 2009. This year's production target from the field is 20.5 million tons, Wang Daofu, president of Changqing Oilfield Co, said on the website of China National Petroleum Corp, PetroChina's parent company.

"This is the seventh consecutive year Changqing has increased its oil and gas output. The average annual growth is 2 to 3 million tons," Wang said.