Gravitational segregation of pore-fluids:
Given the fact that the frictional resistance to the migration of pore-fluids will get enhanced very swiftly with the reduction in pore-sizes, what should be the minimum pore-size in a typical oil reservoir for the occurrence of gravitational segregation between water, oil and gas – when production is on? Whether such deduced pore-sizes would allow us to deduce “a single REV” representing the entire (heterogeneous and anisotropic) reservoir?
What exactly takes place during gravitational segregation between water and oil in a typical pore space - considering the dynamics of the pore-fluids: Will it be (oil-in-water) emulsion or surface-tension (between water and oil) that will be critically influencing the gravitational segregation at the pore-scale – during production? If surface tension dominates the scenario, how exactly to take into account the nature of the substances (such as clay) surrounding the pore-fluids at the pore-scale?
My paper:
Biochar and compost amendment impacts on soil water and pore size distribution of a loamy sand soil
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