Shale Gas Costing 2/3 Less Than OPEC Oil Converges With U.S.

Nomac Drilling Corp. floorhand Chad Glover works on a natural gas drill rig at a Chesapeake Energy Corp. site in Bradford County, Pennsylvania, U.S., on Tuesday, April 6, 2010. Companies are spending billions to dislodge natural gas from a band of shale-sedimentary rock called the Marcellus shale that underlies Pennsylvania, West Virginia and New York. The band of rock, so designated because it pokes through near a city of that name in northern New York, may contain 262 trillion cubic feet of recoverable gas, the U.S. Department of Energy estimates. Photographer: Daniel Acker/Bloomberg via Getty Images