Do these estimates include bitumen (tar sands and heavy oils) and kerogen (shale oil)?
I've seen estimates that the Green River Valley in Northern Colorado alone may contain 1.3T barrels oil in place equivalent of kerogen. The Bakken shale is estimated at 400-600 billion. There are other big shale deposits in the Permian basin in Texas. Global shale deposits are estimated at over 3T barrels of oil equivalents.
The Alberta Athabasca tar sands contain 1.7T oil equivalents of bitumen in place. Venezuela's Orinoco belt are estimated to contain 1.2T barrels of bitumen. That's about the same as the 6T barrels of your estimate.
Much of it is costly to recover, but fracking and horizontal drilling technology is making more and more of these enormous deposits feasible to produce. And who knows if there are deposits out there that geologists just haven't discovered yet. In total, we're a long way from "running out of oil."
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Do these estimates include bitumen (tar sands and heavy oils) and kerogen (shale oil)? I've seen estimates that the Green River Valley in Northern Colorado alone may contain 1.3T barrels oil in place equivalent of kerogen. The Bakken shale is estimated at 400-600 billion. There are other big shale deposits in the Permian basin in Texas. Global shale deposits are estimated at over 3T barrels of oil equivalents. The Alberta Athabasca tar sands contain 1.7T oil equivalents of bitumen in place. Venezuela's Orinoco belt are estimated to contain 1.2T barrels of bitumen. That's about the same as the 6T barrels of your estimate. Much of it is costly to recover, but fracking and horizontal drilling technology is making more and more of these enormous deposits feasible to produce. And who knows if there are deposits out there that geologists just haven't discovered yet. In total, we're a long way from "running out of oil."