Austin Mitchell walks away from an oil derrick outside Williston, N.D., in July 2011. North Dakota is now the No. 2 producer of oil in the U.S. behind Texas. Gregory Bull/AP hide caption itoggle caption Gregory Bull/AP The Two-Way By 2020, United States Will Become World's Leading Oil Producer, Says IEA November 12, 2012 Right now the U.S. imports about 20 percent of its energy, but the International Energy Agency predicts a dramatic turnaround. Energy independence, however, doesn't necessarily mean cheap gas.