“Proved” = easily recovered. There is likely much more oil reserves waiting to be found and “proved” in the USA, but only with a government that supports developing our petroleum resources.
Much of our oil, including some active wells, falls in the “recoverable” category. That is oil that is recoverable with current technology, vs “Proven” which is economically viable and certain to be produced now. The USA has the most Recoverable oil of any country on earth.
Exactly, there are likely vast stores of new U.S. oil reserves (especially offshore) everywhere. Just takes the will to go develop them.
The way it was explained to me is to ask how many days of ‘proven’ food reserves do I have? Oh, about a week. With a reliable supply chain and using current technology (read: a vehicle with gas in it), it would be foolish to pile up more (with my apologies to preppers).