We have an estimated 1.5 TRILLION barrels along the western slope of Colorado extending from Grand Junction, Colorado on into eastern Utah.
Green River Formation - Wikipedia, the free encyclopedia
The problem is that it will probably never be resourcefully extracted due to exorbitant production costs. Imagine sitting on that many bbl of oil and not being able to get it out of the ground!
I'll agree that conventional resources are running more and more slim. I've beaten this subject into the ground over the last several years on APC, so there's no point to self-induced carpal-tunnel syndrome trying to explain basic geologic principles in this debate all over again.
It comes down to production, not overall supply. When no matter what we do globally, we can't produce more than 90 million bbl/day, yet global population still grows unchecked, we have a problem. A production problem that can't be solved.