Author/Authors :
-، - نويسنده Faculty of Petroleum Engineering, Petroleum University of Technology, Ahwaz, I.R. IRAN Ashoori, Siavash , -، - نويسنده Faculty of Petroleum Engineering, Petroleum University of Technology, Ahwaz, I.R. IRAN Jamialahmadi, Mohammad , -، - نويسنده Institute of Thermodynamics and Thermal Engineering, University of Stuttgart, Stuttgart, GERMANY Müller Steinhagen, H. , -، - نويسنده School of Engineering, University of Kansas, Lawrence, USA Ahmadi, Kaveh
Abstract :
In this work, the precipitation and re-dissolution of asphaltenes were studied for an Iranian relatively heavy crude oil. A series of experiments were designed and carried out to quantitatively examine the reversibility of asphaltenes precipitation upon the change in the solvent concentration along with the temperature. n-Heptane was used as the precipitant, and a temperature range of 30 to 70°C was applied to perform the temperature reversibility tests. Experiments were conducted in both porous and non-porous media. As a porous medium, a slim tube apparatus was used which is a one- dimensional model reservoir. Generally, the experiments showed that the precipitation is completely reversible for oil under study upon both composition and temperature changes.
