Determination of Saturation Pressures and Swelling Factors of Solvent(s)-Heavy Oil Systems under Reservoir Conditions

作者：Yang Ping; Li Huazhou; Yang Daoyong^*

来源：Industrial & Engineering Chemistry Research, 2014, 53(5): 1965-1972.

DOI：10.1021/ie403477u

Techniques have been developed to experimentally and theoretically determine saturation pressures and swelling factors of solvent(s)-heavy oil systems under reservoir conditions. Experimentally, PVT tests are performed to measure saturation pressures and swelling factors of a C3H8-heavy oil system and a CH4-C3H8-heavy oil system under reservoir conditions, respectively. Theoretically, the volume-translated Peng-Robinson equation of state (PR-EOS) together with the modified alpha function has been used to model phase behavior of the aforementioned solvent(s) heavy oil systems. A binary interaction parameter (BIP) correlation has been developed for CH4-heavy oil systems based on the literature data. As for the CH4-C3H8-heavy oil system with a fixed composition, both saturation pressure and swelling factor increase with temperature. The PR-EOS together with the modified alpha function and the newly developed BIP correlation is able to predict the saturation pressures and swelling factors of the CH4-C3H8-heavy oil systems with average absolute deviations of 8.53% and 2.21%, respectively.

• 出版日期2014-2-5