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| Corrrelation | Name/Author | Scope |
|---|
| (1) |
\displaystyle c_r (\phi, p) = c_{ri} \cdot \frac{ \ln \left( \frac{ p_n }{p_{\rm max}} \right) }{ \ln \left( \frac{p_i}{p_{\rm max}} \right) } |
| (2) |
p_n = p_{\rm min} + 1.75 \cdot \phi^{0.51} \cdot (p_{\rm max} - p) |
| (3) |
p_{\rm min} = 151 \, {\rm psi}, \quad p_{\rm max} = 30,000 \, {\rm psi} |
| Dobrynin | Sandstone, wide range |
