Effect of Gas Adsorption on the Application of the Pulse-Decay Technique

Table 2

Permeability measurement results under different conditions in the experiment.

Pore pressure (MPa)	Pulse pressure (kPa)	Helium			Carbon dioxide
		Slope		(μD) (Jones, 1997)	Slope		(μD) (Jones, 1997)	(μD) (Cui et al., 2009)
1	40	-0.0011	0.9843	5.86	-0.0441	0.9843	185.5	432.1
	60	-0.0011	0.9923	5.81	-0.0395	0.9936	163.52	379.13
	80	-0.0011	0.9951	5.77	-0.0375	0.9953	154.02	356.85
	100	-0.0011	0.9973	5.72	-0.0349	0.9974	141.13	323.91
2	40	-0.0017	0.9738	4.65	-0.0461	0.9519	97.4	164.71
	60	-0.0018	0.9885	4.88	-0.0407	0.9913	85.66	144.02
	80	-0.0018	0.99253	4.86	-0.038	0.9976	79.66	133.34
	100	-0.0018	0.99503	4.84	-0.0354	0.9946	73.93	123.02
3	40	-0.002	0.9819	3.68	-0.0307	0.9829	44.46	62.49
	60	-0.002	0.9907	3.67	-0.0289	0.9958	41.74	58.4
	80	-0.002	0.9935	3.66	-0.0264	0.9957	37.85	53.34
	100	-0.002	0.9969	3.64	-0.0244	0.9979	34.98	49.01
4	40	-0.0025	0.9777	3.47	-0.0199	0.9896	20.39	27.84
	60	-0.0026	0.9904	3.6	-0.0175	0.9886	17.9	24.25
	80	-0.0026	0.9945	3.6	-0.0162	0.9973	16.51	22.37
	100	-0.0026	0.9967	3.58	-0.015	0.9964	15.29	20.85