Investigation of the Velocities of Coals of Diverse Rank under Water- or Gas-Saturated Conditions for Application in Coalbed Methane Recovery

Table 6

Linear fit equations between UPVp and porosity at water and gas saturation.

	Condition	Equation
Lignite	Water saturation		0.433
	Gas saturation		0.564
Bituminite	Water saturation		0.533
	Gas saturation		0.526
Anthracite	Water saturation		0.706
	Gas saturation		0.769