Liquid-Liquid Displacement in Porous Media as Affected by the Liquid-Liquid Viscosity Ratio and Liquid-Liquid Miscibility
- J.P. Everett (Oklahoma A&M College) | F.W. Gooch Jr. (U.S. Navy) | John C. Calhoun Jr. (University of Oklahoma)
- Document ID
- Society of Petroleum Engineers
- Journal of Petroleum Technology
- Publication Date
- August 1950
- Document Type
- Journal Paper
- 215 - 224
- 1950. Original copyright American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc. Copyright has expired.
- 5.3.1 Flow in porous media
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- 251 since 2007
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The results of two sets of displacement experiments are reported. In the firstset of experiments various solutions of sugar in water were displaced by othersolutions of sugar in water. In the second set oils were displaced by water.Each set of experiments was performed on a linear system made of cementedsilica sand grains.
These displacement tests were made to evaluate the behavior when the ratio offluid viscosities between the displacing and displaced phases was varied. Afurther consequence of the test results is a comparison between displacementbehavior when the displaced and displacing phases are miscible as with sugarsolutions and when they are immiscible as with oil and water.
Buckley and Leverett have presented a theory for the displacement of oil by gasor water based upon the relative permeability concept. This theory presents thedisplacement of oil as occurring in two phases, an initial or primary phasepreceding the breakthrough of the displacing phase and a subordinate orsecondary phase during which both oil and the displacing phase flowsimultaneously through the same porous section. These authors gave the resultsof calculations to show that the percentage of oil displaced during the primaryphase by water drive would be dependent upon the ratio of the viscosity of theoil to that of the water. No experimental evidence was reported by theseauthors to substantiate their theory. Qualitatively, however; it has been foundto be in agreement with many observed field results.
Laboratory investigators have been in general agreement in reporting for air orgas drive a small primary phase of production and a large secondary phase.Reported investigations on water drive have shown instances where both primaryand subordinate phases were important, with the former in general being moresignificant.
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