Fundamentals of Reservoir Rock Properties by Tarek Al-Arbi Omar Ganat

Author:Tarek Al-Arbi Omar Ganat
Language: eng
Format: epub, pdf
ISBN: 9783030281403
Publisher: Springer International Publishing

Leverett noticed that capillary pressure is dependent on porosity, permeability, interfacial tension, and pore radius. Leverett presented his equation as dimensionless equation which called “J-function (J(SW))” and it is function of saturation (Eq. 5.18). Actually, J-function is away to extrapolating capillary pressure data for a particular reservoir rock to other rocks that have similar rock type with differing permeability, porosity and wetting properties.

(5.18)

where:

C = is constant.

For the same reservoir rock, this dimensionless equation helps to remove discrepancies in the Pc versus Sw curves for many cases and decrease them to a common curve.

Some writers changed Eq. 5.19 by including cos θ:

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