Mean Value of Reservoir Permeability:
How exactly to deduce the average-permeability of a petroleum reservoir with
(a) layered heterogeneity (a vertical cross section having multiple individual beds making up the reservoir formation, each having a homogeneous permeability value of k1, k2, k3, k4, etc.)
and
(b) discontinuous heterogeneity (caused by the presence of faults and/or large-scale stratigraphic features)?