Porperm relation

[yasiobasio123]

Hi,

1. Why porosity does not guarantee permeability? Highly porous rocks have very low permeability?
2. Secondly, what is purpose of saturation height modelling, why we do this?

pls. explain, thanks.

[DAH7542]

1. In my opinion, that's due to the fact that porosity and permeability don't depend on exactly the same parameters; specifically, while porosity is independent of grain size, permeability is highly controlled by this parameter (directly affecting pore throat size).
2. It's needed to initialize rock saturations based on capillary-gravity equilibrium.