Abstract: Taking oil sample from DU229+84 super-heavy oil block in Liaohe oil field as the experimental object, this paper studies the relationship of super-heavy oil density and viscosity, mixed crude emulsion density and viscosity, emulsion interfacial film pressure and mixed crude dehydrated droplet fall velocity etc. vs. temperature, and analyzes the effect of temperature on the rate of super-heavy oil dehydration. Experimental results show that the density and viscosity of mixed crude oil and emulsion decrease; the density difference between crude and dehydrated water increases followed by decreasing; the droplet fall velocity in medium (crude oil) increases and the interfacial film pressure decreases with increasing of the temperature. The temperature increase is favorable to speed up the rate of superheavy oil dehydration. At the temperature of 70~95℃, the density difference goes to the highest, and the viscosity reduction of the crude oil and emulsion achieves the maximum. Taking economic factors into comprehensive consideration, the best temperature of super-heavy oil breaking dehydration is 80~95℃.

Key words: super-heavy oil dehydration, emulsion, density, viscosity, temperature