Mining Publication: Two-Phase Flow in Coalbeds
Experimental work by the Bureau of Mines indicates that when a coalbed is degassed by boreholes, the flow of methane may actually increase with time. This phenomenon appears to be the result of a relative permeability effect; that is, the coalbed permeability to the gas increases sharply with decreasing water saturation. This report reviews the background of experimental evidence indicating a relative permeability effect and presents the results of a computer simulation of two-phase flow in coal.
Report of InvestigationsJanuary - 1975
NIOSHTIC2 Number: 10000735
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 8066, 1975 Jan; :1-16