The Thermal Effect on the Physical Properties and Corresponding Permeability Evolution of the Heat-Treated Sandstones

Figure 15

The permeability evolution the damage variables of the heat-treated sandstone.

(a) 25°C

(b) 100°C

(c) 200°C

(d) 300°C

(e) 400°C

(f) 500°C

(g) 600°C

(h) 700°C

(i) 800°C