(a)
(b)
(c)
(d)
Figure 9: Examples of good quality ethane pulse decay pressure data for a high permeability sample from which accurate desorption rates could be calculated ((a) and (c)) and poor quality data for a low permeability sample from which accurate desorption rates could not be calculated ((b) and (d)). Temperature fluctuation over the duration of the measurement has a significant impact on mean pore pressure for the low permeability sample (d). Data collection for the low permeability sample was stopped at ~0.07 MPa differential pressure because of the excessive time required for full decay (b). Green lines in (a) and (b) indicate the difference between minimum mean pressure and final equilibrium pressure.