In an investigation of oil and gas production a study of the physical properties of the sands that serve as reservoirs, as well as the physical properties of oil and gas, is very important. Physical factors of oil sands that should be studied are pore space; size and shape of grains; size and shape of pores of the sand; permeability, or rate of flow of oil through the sand, under definite drops in pressure between the entrance face and exit face of the sample; absorption, or the quantity of oil which a unit volume of the sand will absorb under...
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