Several months after the USA becomes
A net exporter of petroleum
This happens…
Largest Oil and Gas Reserves Ever Assessed Found in West Texas
https://www.houstoncourant.com/news/2018/12/9/largest-oil-and-gas-reserves-ever-assessed-found-in-west-texas
The U.S. Department of the Interior announced Thursday the Permian Basin’s Wolfcamp shale and Bone Spring formation spanning parts of West Texas and eastern New Mexico hold the largest potential oil and gas resources ever discovered.
How many other hidden petroleum fields are there?