Development of large oil and gas fields and coalbed methane

Your question is too general. PetroChina must be Daqing Oilfield, Changqing Oilfield, Tarim Oilfield and Xinjiang Oilfield. Among the domestic large oil and gas fields, Sinopec only has Shengli Oilfield, and the highest output of CNOOC is Shenzhen. In addition to three barrels of oil, there is also a Yanchang Oilfield with high output (Changqing Oilfield is under the Shaanxi Provincial Government); In the world, the largest oil field is Jawar oil field in Saudi Arabia, followed by Dabergen oil field in Kuwait, Bolivar oil field in Venezuela, Safania oil field in the northeast of Saudi Arabia, Rumaila oil field in Iraq and Kirkuk oil field.

As for the development of coalbed methane, it is mainly the United States, Canada and Australia. And the development in China is not mature. At present, there are many units developing coalbed methane. The highest output should be Lan Yan Company of Shanxi Jinmei Group, and then China United Coal, China National Petroleum Corporation, Huabei Oilfield, Henan, Sichuan and other provinces controlled by CNOOC have set up their own coalbed methane development companies. Generally speaking, the development is not ideal!