OIL | WATER | ||||
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|
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current oil saturation, | current water saturation, | ||||
residual oil saturation to water displacement, below which oil is immobile | 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 | ||||
oil relative permeability curvature to water displacement | water relative permeability curvature to oil displacement |
where is initial water saturation which maybe equal to critical or less than critical like for example in petroleogenetic rocks.
The model assumes no gas presence in pores.
Fig. 1. Typical Oil+Water RPM Corey @model |
The alternative form of the Oil+Water RPM Corey @model can be presented as a function of normalized water saturation :
s = \frac{s_w - s_{wi}}{1-s_{wi}-s_{orw}} |
which changes between for initial water saturation and for maximum water saturation .
In this case equations and take form:
OIL | WATER | |||||||
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Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petrophysics / Relative Permeability / RPM @model
[ Permeability ] [ Absolute permeability ]