A remarkably large number of commentators repeat this claim, for no particular reason I can see.
Sure, NA has lots of shale gas and oil, but so do a great many other countries, including Oz and UK, many of which have not been thoroughly explored and in very few of which any attempt has yet been made to start production.
This widespread distribution is a very good thing. The super-high and extremely volatile nature of oil prices has been because its production was limited geographically and very largely to countries hostile to America and the West.
The more countries that produce their own oil, the less money and power will go to the Salafis.
I think starving that particular beast is even worth paying more than present prices.
The US has about 20 billion barrels. Throw in reserves off both coasts, Alaska, North Dakota, and shale oil and you have a much higher number.
Develop and exploit the energy resources under our feet in North America and the mid east will wither and die economically and politically.