Mechanism of Permeability Evolution for Reservoir Sandstone with Different Physical Properties

Table 3

Permeability property and strength considering water pressure 2 MPa and different confining pressure.

Confining pressure (MPa)	Initial permeability; (10^−18 m^2)		Minimum permeability; (10^−18 m^2)		Maximum permeability; (10^−18 m^2)		Peak strength; (MPa)
	Without mud	With mud	Without mud	With mud	Without mud	With mud	Without mud	With mud
3	84.94	47.20	76.76	30.24	414.62	176.20	52.43	21.60
6	59.82	34.93	47.32	20.69	220.52	105.29	71.16	34.76
9	44.12	22.94	32.68	12.33	176.96	40.63	86.20	45.24
15	35.46	14.16	29.20	10.27	74.90	12.24	103.32	62.44