OIL | WATER | ||||||
---|---|---|---|---|---|---|---|
|
| ||||||
s_o | current oil saturation, s_o = 1 - s_w | s_w | current water saturation, s_w = 1 - s_o | ||||
residual oil saturation to water displacement, below which oil is immobile | s_{wсo} | critical water saturation to oil displacement, below which water is immobile | |||||
maximum oil relative permeability to water displacement | maximum water relative permeability to oil displacement | ||||||
n_{ow} | oil relative permeability curvature to water displacement | n_{wo} | water relative permeability curvature to oil displacement |
where
s_{wi} is initial water saturation which maybe equal to critical
s_{wсo} or less than critical
s_{wi} < s_{wco} like for example in petroleogenetic rocks.
The model assumes no gas presence in pores.
Fig. 1. Typical Oil+Water relative permeability |
See also
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petrophysics
[ Permeability ] [ Absolute permeability ] [ Relative permeability ]