The inclusion of unconventional shale gas with conventional gas reserves has caused a sharp increase in estimated recoverable natural gas in Canada.[1] Until the 1990s success of hydraulic fracturing in the Barnett Shales of north Texas, shale gas was classed as "unconventional reserves" and was considered too expensive to recover. There are a number of prospective shale gas deposits in various stages of exploration and exploitation across the country, from British Columbia to Nova Scotia.[2]
The US Energy Information Administration estimated in 2013 that there were 573 trillion cubic feet (tcf) of technically recoverable natural gas in Canada.[3]
^Carrie Tait, "Canada's natural gas resource jumps dramatically in estimates", Financial Post, 12 May 2010.
^Kevin Heffernen, Shale gas in North America, emerging shale opportunities, PDF file, retrieved 15 April 2009. Archived 29 December 2009 at the Wayback Machine
^US Energy Information Administration, World shale gas, 17 May 2013.
and 29 Related for: Shale gas in Canada information
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