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

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• 作者：Ping Yang ; Huazhou Li ; Daoyong Yang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：February 5, 2014
• 年：2014
• 卷：53
• 期：5
• 页码：1965-1972
• 全文大小：343K
• ISSN：1520-5045

文摘

Techniques have been developed to experimentally and theoretically determine saturation pressures and swelling factors of solvent(s)鈥揾eavy oil systems under reservoir conditions. Experimentally, PVT tests are performed to measure saturation pressures and swelling factors of a C₃H₈鈥揾eavy oil system and a CH₄鈥揅₃H₈鈥揾eavy oil system under reservoir conditions, respectively. Theoretically, the volume-translated Peng鈥揜obinson equation of state (PR-EOS) together with the modified alpha function has been used to model phase behavior of the aforementioned solvent(s)鈥揾eavy oil systems. A binary interaction parameter (BIP) correlation has been developed for CH₄鈥揾eavy oil systems based on the literature data. As for the CH₄鈥揅₃H₈鈥揾eavy 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鈥揅₃H₈鈥揾eavy oil systems with average absolute deviations of 8.53% and 2.21%, respectively.