Diffusive transport of shale gas to remain non-Fickian

Klinkernberg effect can be considered to be insignificant as the fluid flow is associated with a relatively high permeable fracture network

Conductivity of fracture-network is only stress dependent; and hence, any increase in fracture aperture thickness might not lead to an enhanced Knudsen number; and in turn, applying the concept of continuum mechanics can be avoided

Non-linear relation between flow-rate and pressure gradient; and hence; no question of macroscopic-Darcy coming into picture.