Pore-scale study of drainage displacement under combined capillary and gravity effects in index-matched porous media
نویسندگان
چکیده
منابع مشابه
Competition of gravity, capillary and viscous forces during drainage in a two-dimensional porous medium, a pore scale study
We have studied experimentally and numerically the displacement of a highly viscous wetting fluid by a non-wetting fluid with low viscosity in a random two-dimensional porous medium under stabilizing gravity. In situations where the magnitudes of the viscous-, capillaryand gravity forces are comparable, we observe a transition from a capillary fingering behavior to a viscous fingering behavior,...
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We present a systematic, quantitative assessment of the impact of pore size disorder and its interplay with flow rates and wettability on immiscible displacement of a viscous fluid. Pore-scale simulations and micromodel experiments show that reducing disorder increases the displacement efficiency and compactness, minimizing the fluid-fluid interfacial area, through (i) trapping at low rates and...
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We have investigated experimentally the competition between viscous, capillary, and gravity forces during drainage in a two-dimensional synthetic porous medium. The displacement of a mixture of glycerol and water by air at constant withdrawal rate has been studied. The setup can be tilted to tune gravity, and pressure is recorded at the outlet of the model. Viscous forces tend to destabilize th...
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This paper concentrates on the flow properties when one fluid displaces another fluid in a two-dimensional (2D) network of pores and throats. We consider the scale where individual pores enter the description and we use a network model to simulate the displacement process. We study the interplay between the pressure build up in the fluids and the displacement structure in drainage. We find that...
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In this paper we discuss a pore scale model for crystal dissolution and precipitation in porous media. We consider first general domains, for which existence of weak solutions is proven. For the particular case of strips we show that free boundaries occur in the form of dissolution/precipitation fronts. As the ratio between the thickness and the length of the strip vanishes we obtain the upscal...
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ژورنال
عنوان ژورنال: Water Resources Research
سال: 2006
ISSN: 0043-1397
DOI: 10.1029/2005wr004553