Research Article
Experimental Study on the Effects of Stress Variations on the Permeability of Feldspar-Quartz Sandstone
Table 2
The fitting parameters in the mathematical models describing the relationship between permeability and injection pressure.
| Sample | Cycle | Process | | | |
| S1 | 1 | Loading | 0.117 | 0.031 | 0.9946 | Unloading | 0.137 | 0.023 | 0.9971 | 2 | Loading | 0.116 | 0.030 | 0.9964 | Unloading | 0.135 | 0.022 | 0.9987 | 3 | Loading | 0.120 | 0.029 | 0.9961 | Unloading | 0.137 | 0.022 | 0.9990 |
| S2 | 1 | Loading | 0.116 | 0.035 | 0.9998 | Unloading | 0.148 | 0.022 | 0.9988 | 2 | Loading | 0.128 | 0.032 | 0.9988 | Unloading | 0.154 | 0.021 | 0.9998 | 3 | Loading | 0.127 | 0.031 | 0.9994 | Unloading | 0.157 | 0.020 | 0.9986 |
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