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Experimental study of dispersion in a consolidated sandstone
Author(s) -
Kinzel Douglas L.,
Hill Gordon A.
Publication year - 1989
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450670107
Subject(s) - dispersion (optics) , tracer , chloride , phase (matter) , porous medium , ion , permeability (electromagnetism) , porosity , materials science , mineralogy , geology , chemistry , geotechnical engineering , optics , physics , biochemistry , organic chemistry , membrane , nuclear physics , metallurgy
Dispersion experiments were conducted on a Berea sandstone core having a permeability of 0.28 (μm) 2 , using chloride ion as the water soluble tracer to provide quantitative information useful to the prediction of the motion of reservoir fluids in enhanced oil recovery. Both single phase (water only) and two phase (water plus oil) experiments were completed under identical operating conditions in order to observe flow differences. The theory of Ebach and White (1958) was used to determine the dispersion coefficients. It has been found that over a wide range of fluid velocities, low concentrations of oil have no effect on the dispersion of chloride ions in the water phase but high concentrations of oil (S 0 ˜ 0.55) resulted in a dispersion coefficient 2.2 times higher than for chloride ions in water alone. This work indicates that the presence of an immiscible phase has a pronounced affect on the dispersion coefficient in porous media and must be accounted for in quantitative modeling of reservoir flows.