Laboratory measurements of relative permeability of cores.
The usual practice is to measure 2-phase relative permeability and then use correlations to predict 3-phase relative permeability.
The 3-phase rrelative permeability measurements are also available in commercial and research laboratories but at a very high cost and duration.
See also
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Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petrophysics
[ Permeability ] [ Absolute permeability ] [ Relative permeability ] [ Wettability ]