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Ability of reservoir fluid to  to translate fluid volumes  volumes throughout the pore volume:

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\sigma = \bigg< \frac{k}{\mu} \bigg> \ h_{\rm eff}

where

LaTeX Math Inline
body\bigg<\frac{k}{\mu} \bigg>

multiphase fluid mobility

LaTeX Math Inline
bodyh

_{\rm eff}effective formation thickness

effective formation thickness



SymbolDimensionSI unitsOil metric unitsOil field unitsAdditional

LaTeX Math Inline
body\sigma

M-1 L4 T1

m3/(Pa·s)

(md·m)/cp = 9.87 · 10-13 m3/(Pa·s)

(md·ft)/cp = 0.3048 (md·m)/cp

(md·m)/cp = 8.527 · 10-5 cmd/kPa = 8.64 · 10-3 cmd/atm

cmd/atm = 115.741 (md·m)/cp


For a single-phase fluid it simplifies to:

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\sigma = \frac{kh}{\mu}

where

LaTeX Math Inline
bodyk

formation permeability to a single-phase fluid

LaTeX Math Inline
body\mu

fluid viscosity

LaTeX Math Inline
bodyh

effective formation thickness


See also

...

Physics /  Fluid Dynamics / Percolation

Petroleum Industry / Upstream / Subsurface E&P Disciplines / Reservoir Flow Simulation

Field Study & Modelling ] [ Complex reservoir properties ]