OIL | WATER | ||||||
---|---|---|---|---|---|---|---|
|
| ||||||
s_o | current oil saturation, | s_w | current water saturation, s_w = 1 - s_o | ||||
s_{orw} | residual oil saturation to water displacement, below which oil is immobile | s_{wс} | critical water saturation to oil displacement, below which water is immobile | ||||
k_{rowc} | maximum oil relative permeability during water displacement | k_{rwoc} | maximum water relative permeability during 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_{wс} or less than critical s_{wi} < s_{wc} 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 ]