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
Phoenix Natural Gas Energy Limited (its Republic of Ireland supply business) for £19.1 million. Terra Firma sold Phoenix Natural Gas to Hastings Funds Management (now re-branded Vantage Infrastructure) in 2013 for £700 million. The Utility Regulator in October 2015 set out a proposal to extend the licence area of Phoenix Natural Gas to include 13 new towns at an expected cost of £58 million. Phoenix Natural Gas Phoenix Natural Gas is the largest gas distribution business in Northern Ireland, being the owner and operator of the licence for the distribution network in the Greater Belfast area. The distribution business is responsible for the