3-phase RPM for high oil saturation water-wet formations.

k_{rw}(s_w, s_o, s_g) = k_{rw}(s_w)

s_{wn} = \frac{s_w - s_{wi}}{1 - s_{wi} - s_{or}}

k_{rg}(s_w, s_o, s_g) = k_{rg}(s_g)

s_{on} = \frac{s_o - s_{or}}{1 - s_{wi} - s_{or}}

k_{ro}(s_w, s_o, s_g) = 
 
k_{rcow}^{-1} k_{row}(s_w)k_{rog}(s_g) +
 
k_{row}(s_w) k_{rg}(s_g) + k_{rw}(s_w) k_{rog}(s_g)

s_{gn} = \frac{s_g}{1 - s_{wi} - s_{or}}

where .

See also