One little gas deposit called the destin dome is conservatively 3tcuft or so. The North Dakota finds are huge.
There is oil everywhere.
Bakken Reserve: Estimates are anywhere from a conservative 25 billion barrels of oil in place, to a high estimate by the United States Geological Survey of 400 billion barrels of oil in the Bakken formation. Not only is the oil plentiful, but it’s high quality too, 41 degree light sweet crude. The Bakken formation is a formation of black shale, siltstone, and sandstone. The formation lies beneath the Mississippian formation, Saskatchewan’s current source of light sweet crude. The Bakken formation is situated beneath southeastern Saskatchewan, southwestern Manitoba, and North Dakota.
I have heard much lower recoverable numbers from the Bakken. Either way, we will find out. With energy prices at a premium, anything recoverable will be harvested.