Natural gas is a general term for mixed gases mainly composed of hydrocarbons that exist in underground rock reservoirs. Including oilfield gas, gas field gas, coalbed methane, mud volcano gas, and biogenic gas. The main component is methane, usually accounting for 85-95%; Next are ethane, propane, butane, etc.

The natural gas industry is a high-quality fuel and chemical raw material. The amount of recoverable resources in China has increased by 57% to 22 trillion cubic meters, which is 1.57 times that of the previous round. Due to the increasing demand for clean energy in environmental protection and the impact of high oil prices, the natural gas industry has become a new economic growth point.