Research Article
An Experimental Study on the Slippage Effects of Sandstone under Confining Pressure and Low Pore Pressure Conditions
Figure 5
Permeability changes under the different pore pressure levels.
(a) 100°C heat-treated test piece |
(b) 300°C heat-treated test piece |
(c) 500°C heat-treated test piece |
(d) 700°C heat-treated test piece |