Source: U.S. Energy Information Administration, Petroleum Supply Monthly Note: Crude oil includes lease condensate. Five states and the Gulf of Mexico supplied more than 80%, or 6 million barrels per day, of the crude oil (including lease condensate) produced in the United States in 2013. Texas alone provided almost 35%, according to preliminary 2013 data released in EIA’s March Petroleum Supply Monthly . The second-largest state producer was North Dakota with 12% of U.S. crude oil production, followed by California and Alaska at close to 7% each and Oklahoma at 4%. The federal offshore Gulf of Mexico produced 17%. Total U.S. crude oil production grew 15% in 2013 to 7.4 million barrels per day. Texas and North Dakota led that growth, with their crude oil outputs each increasing 29%, respectively, from 2012. Production gains in both states came largely from shales, especially the Eagle Ford in Texas and the […]