Abstract
Emulsions of simulated sea water in crude oils or in model oils containing dispersed asphaltenes have been studied using a Couette viscometer. Non-Newtonian behavior was observed for the model oil emulsions and for some of the crude oil emulsions with high water contents and small droplet diameters. Viscosities of the crude oil emulsions have been related to water volume fractions by the use of an Eilers-type equation which allows estimates to be made of maximum packing fractions and intrinsic viscosites. The latter were found to be greater than 2.5 and to increase as average droplet size decreased. For the model emulsions, flow curves became linear above minimum shear rates which were used to calculate flocculated droplet separations according to the theory of Albers and Overbeek.
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