Yeah, those are estimates. But 70 years is much less than 200 years. And the cost to actually access and process it is not mentioned. It also assumes that this oil will be available to us, but some of those countries are not particularly friendly to us. The U.S. has been producing the most oil of all nations for six years in a row now - and the U.S. is a net oil exporter. That means that U.S. corporations would rather sell more oil to other nations than make it available to U.S. citizens. Corporations will not change their habits if any particular President opens up more reserves."
OSLO, NORWAY–The United States now holds the world’s largest recoverable oil reserve base–more than Saudi Arabia or Russia–thanks to the development of unconventional resource plays.
Ranking nations by the most likely estimate for existing fields, discoveries and as-of-yet undiscovered fields (proved, probable. possible and undiscovered), the United States is at the top of the list with 264 billion barrels of recoverable oil reserves, followed by Russia with 256 billion, Saudi Arabia with 212 billion, Canada with 167 billion, Iran with 143 billion, and Brazil with 120 billion (Table 1).
Importantly, unconventional plays account for more than 50 percent of remaining U.S. oil reserves, with Texas alone holding more than 60 billion barrels of recoverable oil in shale plays.
The reserves data distinguish between reserves in existing fields and new projects, and potential reserves in recent discoveries and still undiscovered fields. The estimates include crude oil plus condensate.
Total global oil reserves are estimated at 2,092 billion barrels, or 70 times the current production rate of about 30 billion barrels of oil a year.
Other public sources of global oil reserves are based on official reporting from national authorities, with reserves reported based on a diverse and opaque set of standards. For example, some OPEC countries, such as Venezuela, report official reserves apparently including yet-undiscovered oil, while China and Brazil officially report conservative estimates and only for existing fields."
So... if my math is correct, the total accessible oil reserves are about 70 years. That does not include untapped sources in all but Venezuela. The thing is, that production of 30 billion barrels, is now down to 28 billion and projected to be down to 20 billion barrels by 2035. The ANWR that now not part of the known reserves has an estimated 1,096 additional barrels. If Trump opens that up.... some say it could be ten times that.
As Charlie Spencer pointed out, the real problem is that we know that oil is running out but we are still wasting it for things that can be serviced using other products. Instead of burning oil to motivate vehicles we can motivate them by using electricity or hydrogen or ethanol. We also don't need to burn oil to generate electricity.
I may or may not live to see if oil truly runs out in 2050, and I won't live to see if it runs out 70 years from now. Both of those life-ends will be wrong anyway because they do not factor in the amount of oil we are already saving (and have been saving for decades) as technology improves - petroleum fueled vehicles get much better mileage than they used to (and may even do better) and alternately fueled vehicles don't burn petroleum.
I like petroleum fueled cars. But not so much that I cannot tolerate other technologies. When I want to be wowed by ICE racecars I can go watch sprinters and late models that use ethanol.