The Study On Flowing Rules Of Emulsions Through Porous Medium

This thesis have investigated the influence of pressure gradient on permebility of porous medium. Collecting oil, some oil is collected in the form of emulsions and many processes of EOR also come across the problems of emulsions and their flowing. So this study is very important. This thesis have studied the characteristic of the flowing rules of emulsions through porous media, and considered the relativity between the characteristic and EOR. We have conducted the experiment studying of the varying rule of the permeability of porous media under constant pressure gradient, the inflence of pressure gradient on the varying permeability, and the influence of the drop-side and interfacial tension on the varying permeability, we have completed these works mainly:Experimentally investigated the physical mechanics of the flowing rule of dilute stable emulsions in porous media Designed a kind of sand-packed micro-model and a new light-sculpt equipment,conducted the micro-model study, experimentally investigated the physical mechanics of the flowing rule of dilute stable emulsions in porous media, got the pictures of the flowing of dilute stable emulsions through porous media. Drawn the conclusions that the reason of the reduction of the permeability is the capture of the droplets of the emulsions, the droplets affect the flowing of emulsions in porous media have two forms, interception capture and strain capture, the captured droplets can re-entrain into the flowing and through the porous media under a greater pressure gradient.Experimentally studied the varying rule of emusions through porous media under the constant pressure, conducted the experiments of the flowing of dilute stable emulsions in porous media under the constant pressure, measured the permeabilities of the porous media. Drawn the conclusion that the permeability of porous media lowers with flowing procession.Experimentally studied the influence of varying value of pressure gradient on the varying permeability. Conducted the experiments of the flowing of dilute stable emulsions in porous media under the different pressure gradient, measured the permeabilities of porous media. Drawn the conclusion that higher the pressure gradient is, higher the lowering permeability is.Experimentally studied the influence of drop-side and interfacial tension on the varying permeability under constant pressure gradient and different pressure gradient. Conducted the flowing experiments the of dilute stable emulsions in porous media with emulsions which have the same interfacial tension but different drop-side and the emulsions which have the same drop-side but different interfacial tension. Measured the permeabilities of porous media. Drawn the conclusions that drop-side and interfacial tension affects the reduction of the permeabilities, larger the droplet is, higher the the lowering permeability is and higher the interfacial tension is, higher the lowering permeability is.Theoretically studied the influence of dropsied and the capillary number on the varying permeability of porous media under constant pressure gradient and different pressure gradient. Caculated the varying rule of permeability of porous media with PV of injected emulsions under constant pressure gradient and different pressure gradien from the viewpoint of "deep-bed filtration" theory. Caculated the influence of drop-side on the permeability of porous media. Caculated the influence of capillary number on the permeability of porous media. Drawn the conclusion that drop-side and interfacial tension affect the reduction of the permeabilities, larger the droplet is, higher the lowering permeability is and higher the capillary number is, higher the lowering permeability is.Theoretically studied the varying rule of permeability of porous media under constant pressure gradient and different pressure gradient with a new mathematical model. Created a new mathematical model which contains the mechanics of the re-entrainment of the captured droplet in porous media under greater pressure gradient, caculated t...