Porosity – Permeability Relationship of Shale


Kinji Magara,
Imperial Oil Limited



Fluid pressure gradients in shales can be determined by the porosity dis- tributions of the incompletely compacted shales. It is possible to estimate permeability changes in shales by using the fluid pressure gradient (derived from the shale porosity distribution) and Darcy’s law. The integration of these permeability changes with porosity values in shales can be used to estab- lish a relationship between shale porosity and permeability in the subsurface.