Why is it difficult to know with certainty the amount ofextractable oil in rock formations?

A. There is frictional resistance to fluid flow in the rock porespaces.

B. The viscosity of the oil prevents total removal of all oil inthe pore spaces.

C. The amount of pore spaces and their connectivity (i.e. Permeability) vary throughout any rock formation.

D. All of the above

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The detailed answer for the above question is provided below D All of the above Explan... View the full answer