[Just doubled the world's known reserves of oil from 1 Trillion to 2 Trillion barrels]
Excellent Smithers.
‘And the Green River (untapped) formation...weighs in (no pun intended) at 3Trillion barrels.....with 1Trillion barrels recoverable with today’s (fracking) technology.“
The Green River oil shale does not respond to today’s fracking technology. You are confusing shale oil with oil shale. The oil shale of the Green River Formation does not in fact contain oil but contains kerogen which must be converted to oil using immense amounts of heat. Usually it has to be mined rather than drilled for. The economics for it do this just don’t work.
http://bakken.com/news/id/225072/untapped-story-behind-green-river-shale-formation/
Shale oil is crude oil found in other formations such as the Bakken that can be recovered using horizontal drilling and fracking technology.