The unconventional revolution also transformed the map of oil resources. One area in the Permian—known as the Spraberry and Wolfcamp—was now deemed the second-largest oil field in the world, behind only Ghawar, Saudi Arabia’s supergiant field. The Eagle Ford was ranked fifth, behind Burgan in Kuwait and another Saudi field, and ahead of the giant Samotlor field that is the foundation of Russia’s oil might. The United States was back, once again a major player in world oil.
