Geologic studies of deep natural gas resources / U.S Department of the Interior, U.S. Geological Survey ; edited by Thaddeus S. Dyman and Vello A. Kuuskraa ; prepared in cooperation with the U.S. Department of Energy--National Energy Technology Laboratory, the Gas Technology Institute, and Advanced Resources International.

Discusses undiscovered technically recoverable natural gas in playas deeper than 15,000 feet in onshore regions of U.S. Also includes a chapter on potential for deep gas in former Soviet Union.