The cavern of oil goes all the way inland under Alabama, etc.
It can pump 500,000 barrels a day for ten years!
That about one normal tanker a day.
About what one normal to large refinery can handle every day.
So right there, P O O F , instant under $2 gasoline.
Plus, that much less money for our enemies(the Saudis) to buy arms for their pals.