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\phi_r = \frac{\phi_e-\phi_0}{1-\phi_e+\phi_0} |
where
| effective porosity | ||||
| porosity cut-off |
The usual range is
| LaTeX Math Inline | ||
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See also
...
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petrophysics (PP) / Volumetric Rock Model / Effective porosity