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| LaTeX Math Block |
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FZI = \frac{RQI}{\phi_r} |
where
It has much weaker dependence on effective porosity and shaliness and can be often considered constant within a given lithofacies which makes it a very efficient tool for lithofacies analysis
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The constant FZI means that permeability strictly follows Cozeny-Karman permeability @model.
The FZI depends on grains size distribution, shape and packing.
The most popular correlation with a mean grain size
is given as:| LaTeX Math Block |
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FZI = a \cdot D_g |
where coefficient
is a function of grain shape, packing, inter-grain clay and, as a consequence, of inter-grain effective porosity .See also
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Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petrophysics
