As I posted in another thread, enough oil and natural gas to provide for ALL US energy needs for 7 years!
That's an unfortunate illustration, since oil does not and can not work that way.
Oil is more like a lake that's fed by a bunch of rivers, and that lake provides the water source for a city. Now one of those rivers has built up; but the city still gets its water from the lake, not from the river. What this example implies, and some of the wags here seem to believe, is that you can just start tapping the river instead. You can't. All this illustration tells us is that the volume of what's expected to come out of that river is equivalent to the volume we would take out of the lake for seven years.
And again, this particular "river" has been tapped for oil since the 1920s. And again looking at the map in the link, a lot of it is in New Mexico, a good portion is in west Texas, and at least half of the whole thing is in Mexico.