Natural gas before the natural gas can be transported. Natural gas extracted from oil wells is called casinghead gas (whether or not truly produced up the annulus and through a casinghead outlet) or associated gas. The natural gas industry is extracting an increasing quantity of gas from challenging resource types: sour gas, tight gas, shale gas, and coalbed methane. There is some disagreement on which country has the largest proven gas reserves. Sources that consider that Russia has by far the largest proven reserves include the US CIA (47 600 km³), the US Energy Information Administration (47 800 km³), and OPEC (48
China Natural Gas China Natural Gas China Natural Gas Inc. is a Chinese energy company that, through its subsidiaries, is engaged in the distribution and sale of natural gas and gasoline to commercial, residential and industrial customers in the Xi'an area and the Shaanxi province of the People's Republic of China. The company also engages in the construction of pipeline networks. It offers natural gas through a network of approximately 120 kilometers of high pressure pipelines and sells compressed natural gas as vehicular fuel through a network of filling stations in Shaanxi and Henan provinces. China Natural Gas is the first Chinese natural