Coalbeds: A Source of Natural Gas.
Oil and Gas J 1975 Jun; 73(24):47-49
Work by the Bureau of Mines has demonstrated that coalbeds can yield substantial quantities of pipeline quality natural gas. The estimated volume of gas contained in U.S. coals--some 300 trillion cubic feet--is equivalent to the proved and currently recoverable reserves of natural gas in the United States. The necessary technology to drain and recover much of this gas is already available.
Oil and Gas J., V. 73, No. 24, June 16, 1975, PP. 47-49