Open pore   fraction of pore volume  :

V_{\rm open} = \frac{\Omega_{\rm open}}{\Omega_\phi}

See also

Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petrophysics (PP) / Volumetric Rock Model

[ Basic reservoir properties ] [ Pore volume ] [ Open pore volume ] [ Closed pore volume ] [ Porosity ] [ Open porosity ] [ Closed porosity ]