Shale Gas Was Almost a Quarter of U.S. Output in 2010, EIA Says 2011-04-05 21:43:06.719 GMT By Christine Buurma April 5 (Bloomberg) -- Natural gas from shale formations comprised 23 percent of total U.S. production in 2010, according to the Energy Department. Shale gas output was 4.87 trillion cubic feet in 2010, the department’s Energy information Administration said in a release today. That’s a 57 percent increase from 3.11 trillion in 2009, according to department data released in December. In an assessment of 48 shale basins in 32 countries, the EIA said technically recoverable shale gas resources totaled 5,760 trillion cubic feet. Adding the U.S. estimate of 862 trillion results in a total shale resource base estimate of 6,622 trillion cubic feet for the United States and the other 32 countries assessed. Adding shale gas to other gas resources increases total world technically recoverable gas by more than 40 percent to 22,600 trillion cubic feet, the report showed. For Related News and Information: Natural Gas Prices: NG1 GP Top Energy Stories: ETOP Top Natural Gas Market Stories: TGAS --Editors: Bill Banker, Richard Stubbe To contact the reporter on this story: Christine Buurma in New York at +1-212-617-4302 or cbuurma1@bloomberg.net; To contact the editor responsible for this story: Dan Stets at +1-212-617-4403 or dstets@bloomberg.net