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(1) k = k_1 \, \phi^{m_1} + k_2 \, \phi^{m_2}



effective porosity

This is a complex empirical model which does not directly rely on the Flow Zone Indicator.

Usually, the first component  k_1 \, \phi^{m_1} dictates permeability values at low porosities while second component k_2 \, \phi^{m_2} takes over at high porosities.

This allows to cover a wider range of porosity variations comparing to single-component power law permeability @model.

This model was thought to be empirical for a very long time but later on it was shown that it has a physical meaning within the frame of  fluid percolation through a porous medium with fractal structure.

See also

Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petrophysics / Absolute permeability / Absolute permeability @model

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