3-phase RPM for low oil saturation water-wet formations.
(1) |
k_{rw}(s_w, s_o, s_g) = k_{rw}(s_w) |
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(2) |
s_{wn} = \frac{s_w - s_{wi}}{1 - s_{wi} - s_{or}} |
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(3) |
k_{rg}(s_w, s_o, s_g) = k_{rg}(s_g) |
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(4) |
s_{on} = \frac{s_o - s_{or}}{1 - s_{wi} - s_{or}} |
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(5) |
k_{ro}(s_w, s_o, s_g) = \frac{s_{on}}{k_{row}^*} \frac{k_{row}(s_w)}{1-s_{wn}} \frac{k_{rog}(s_w)}{1-s_{gn}} |
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(6) |
s_{gn} = \frac{s_g}{1 - s_{wi} - s_{or}} |
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where
k_{rcow} = k_{row}(s_{wi}).
See also
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petrophysics
[ Permeability ] [ Absolute permeability ] [ Relative permeability ]