“The Green River Formation--an assemblage of over 1,000 feet of sedimentary rocks that lie beneath parts of Colorado, Utah, and Wyoming--contains the world's largest deposits of oil shale,”Anu K. Mittal, the GAO’s director of natural resources and environment said in written testimony submitted to the House Science Subcommittee on Energy and Environment.
“USGS estimates that the Green River Formation contains about 3 trillion barrels of oil, and about half of this may be recoverable, depending on available technology and economic conditions,” Mittal testified.
“The Rand Corporation, a nonprofit research organization, estimates that 30 to 60 percent of the oil shale in the Green River Formation can be recovered,” Mittal told the subcommittee. “At the midpoint of this estimate, almost half of the 3 trillion barrels of oil would be recoverable. This is an amount about equal to the entire world's proven oil reserves.”
In her oral statement before the subcommittee, Mittal said that developing the shale oil would create wealth and jobs for the country, but also challenges for government.
“Being able to tap this vast amount of oil locked within this formation will go a long way to help to meet our future demands for oil. The U.S. Geological Survey, as you noted, estimates that the formation contains about 3 trillion barrels of oil of which half may be recoverable,” she said.
