... at different times and positions in the cylinders. Isopar V and tap water were used as the testing fluids and Span80 as the surfactant. Four water cuts, two mixing speeds, and two surfactant concentrations were investigated. Experimental results showed that the apparent viscosity of the emulsion layer...

... of injection. Oil recovery, pressure drop, and surfactant concentration data were utilized. The surfactant flooding model was then coupled with a geochemical model that captures different reactions during LSWI/EWI. The geochemical reactions considered include aqueous, dissolution/precipitation, and ion...

... chemical flooding methods surfactant adsorption surfactant concentration black dotted line reservoir experiment sandpack column oil recovery concentration adsorption porous media nanoparticle concentration injection fluid upstream oil & gas enhanced recovery nanoparticle red line asw...

... velocity ( v Sg ) and highest superficial liquid velocity ( v SL ) values. At these conditions, severe slugging is partially eliminated only with high surfactant concentration and the use of static mixer. The use of surfactant in other locations results in elimination of slug production stage and reduced...

.... salinity solubility phase behavior surfactant concentration surfactant injection adsorption viscosity upstream oil & gas oil recovery microemulsion ppm nacl enhanced recovery chemical flooding methods reservoir polymer concentration brine experiment concentration surfactant blend...

... solution enhanced recovery upstream oil & gas salinity gradient oil recovery gravity-stable surfactant flood microemulsion viscosity chemical flooding methods surfactant flood weak aquifer concentration surfactant concentration aquifer viscosity Ahmed , T. 2010 . Reservoir...