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
Natural gas in Canada Natural gas in Canada At per day in 2011, Canada was the fourth-largest producer of natural gas in the world. Its proven reserves were at the close of 2006. A large portion of Canada's gas is exported to the United States; in 2006, per day. In 2016 natural gas was used to provide 35% of all energy in Canada, double the amount supplied by electricity. Electricity generated by natural gas was 8.5% of the nations total. Natural gas is used to supply 50% of space heating, and 65% of water heating in homes, similarly 80% of businesses use natural gas