Research Article
Experimental Study on the Effects of Stress Variations on the Permeability of Feldspar-Quartz Sandstone
Table 3
Fitting parameters in the mathematical models of permeability and confining pressure.
| Sample | Cycle | Process | | | |
| S1 | 1 | Loading | 0.128 | −0.182 | 0.9860 | Unloading | 0.086 | −0.049 | 0.9671 | 2 | Loading | 0.092 | −0.083 | 0.9968 | Unloading | 0.085 | −0.060 | 0.9749 | 3 | Loading | 0.085 | −0.064 | 0.9765 | Unloading | 0.080 | −0.042 | 0.9219 |
| S2 | 1 | Loading | 0.169 | −0.208 | 0.9621 | Unloading | 0.106 | −0.046 | 0.9935 | 2 | Loading | 0.115 | −0.089 | 0.9969 | Unloading | 0.106 | −0.064 | 0.9913 | 3 | Loading | 0.110 | −0.084 | 0.9943 | Unloading | 0.101 | −0.057 | 0.9817 |
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