Experimental Measurement of the Transport Flow Path Aperture in Thermally Cracked Granite and the Relationship between Pore Structure and Permeability

Table 2

Summary of experimental results.

Treated temperature	Pc			Pp		Porosity
°C	MPa	MPa	μm	MPa	m^2	%
400	5	0.850-0.885	0.103-0.107	0.5	-	1.38
	7.5	1.21-1.59	0.0573-0.0754	0.75	-	1.32
	10			1		1.24
	15			1.5		1.13
	20			2		1.07
	25			2.5		1.02
	30			3		0.990
600	5	0.039-0.048	1.87-2.30	0.5	-	1.83
	7.5	0.056-0.062	1.45-1.60	0.75	-	1.66
	10	0.074-0.078	1.15-1.21	1	-	1.50
	15	0.113-0.124	0.723-0.794	1.5	-	1.33
	20	0.154-0.188	0.476-0.581	2	-	1.22
	25	0.238-0.275	0.326-0.376	2.5	-	1.17
	30	0.351-0.362	0.247-0.255	3	-	1.11
800	5			0.5	-	2.66
	7.5	0.027-0.028	3.18-3.30	0.75	-	2.44
	10	0.041	2.18	1	-	2.21
	15	0.063-0.065	1.38-1.42	1.5	-	1.91
	20	0.081-0.096	0.936-1.08	2	-	1.72
	25	0.126-0.140	0.642-0.713	2.5	-	1.58
	30	0.181-0.192	0.468-0.496	3	-	1.50

Pc = confining pressure; Pp = pore pressure from the permeability measurement;  = permeability;  = gas breakthrough pressure;  = flow path aperture.