Mechanism of Permeability Evolution for Reservoir Sandstone with Different Physical Properties

Table 4

Permeability and strength considering confining pressure 6 MPa and different water pressure.

Permeable 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
2	59.82	34.93	47.32	20.69	220.52	105.29	71.76	34.76
3	73.66	44.83	58.02	33.40	236.94	152.49	68.10	34.73
4	79.98	55.18	67.48	50.85	261.38	161.84	62.90	38.04