U.S. Energy Supply (IMAGE) Duke University Caption Oil wells in California are among the sources that provide the U.S. with 75 percent of its crude oil domestically. Credit John Ciccarelli, Bureau of Land Management Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.