According to US Energy Information Administration report from June 2013, the United States is sitting on 58 billion barrels of technically recoverable crude oil and another 665 trillion cubic feet of technically recoverable wet natural gas from shale and other unconventional reserves. It is these reserves that are driving what has become ubiquitously known as the “shale boom.”
A couple caveats are in order, however. First of all, there is a significant difference between what is “technically” recoverable and what is “economically” recoverable. Indeed, technically recoverable reserves designates exactly that, what can be recovered with the technology that currently exists. This number is still a theoretical one, however, because it excludes the cost of such recovery, and thus does not account for what can be produced profitably.
Second, the United States is by no means the only country on the planet with massive unconventional reserves. Not by a long shot as it turns out.
Indeed, in terms of shale oil, the US places at number two, with 58 billion barrels of technically recoverable crude in the ground. The top ten countries in terms of shale oil are as follows (in billions of barrels):
Read more: http://www.equities.com/editors-desk/stocks/energy/getting-to-know-your-crude-foreign-shale-plays