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A value of oil saturation 

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bodys_{orw}
below which oil is not getting swept by water:

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k_{row} (s_o < s_{orw}) =0


It usually depends on  absolute permeability

LaTeX Math Inline
bodyk_a
 as:

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s_{orw} = s_{orw,0} \cdot \left( 1 + k_a/k_{a,sorw} \right)^{-n_{sorw}} 


See also


Physics /  Fluid Dynamics / Percolation

Petroleum Industry / Upstream / Subsurface E&P Disciplines / Field Study & Modelling 

Petrophysics ] [ Basic reservoir properties ] [ Wettability ] [ Permeability ] [ Absolute permeability ]  [Relative permeability]  [ Oil permeability ] [ Oil relative permeability ] [ Oil-water relative permeability (krow) ]