Leverett J-function

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{{ safesubst:#invoke:Unsubst||$N=Technical |date=__DATE__ |$B= {{#invoke:Message box|ambox}} }} In petroleum engineering, the Leverett J-function is a dimensionless function of water saturation describing the capillary pressure,[1]

where is the water saturation measured as a fraction, is the capillary pressure (in pascal), is the permeability (measured in ), is the porosity (0-1), is the surface tension and is the contact angle. The function is important in that it is constant for a given saturation within a reservoir, thus relating reservoir properties for neighboring beds.

The Leverett J-function is an attempt at extrapolating capillary pressure data for a given rock to rocks that are similar but with differing permeability, porosity and wetting properties. It assumes that the porous rock can be modelled as a bundle of non-connecting capillary tubes, where the factor is a characteristic length of the capillaries' radii.

See also

References

  1. {{#invoke:Citation/CS1|citation |CitationClass=journal }}

External links


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