Determination of Three-Phase Boundaries of Solvent(s)鈥揅O2鈥揌eavy Oil Systems under Reservoir Conditions

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• 作者：Huazhou Li ; Daoyong Yang ; Xiaoli Li
• 刊名：Energy & Fuels
• 出版年：2013
• 出版时间：January 17, 2013
• 年：2013
• 卷：27
• 期：1
• 页码：145-153
• 全文大小：508K
• 年卷期：v.27,no.1(January 17, 2013)
• ISSN：1520-5029

文摘

The liquid鈥搇iquid鈥搗apor (L₁L₂V) phase boundaries of solvent(s)鈥揅O₂鈥揾eavy oil systems under reservoir conditions are experimentally and theoretically determined. Experimentally, the L₁L₂V phase boundaries of one CO₂鈥揾eavy oil mixture, one C₃H₈鈥揅O₂鈥揾eavy oil mixture, and one n-C₄H₁₀鈥揅O₂鈥揾eavy oil mixture in the pressure鈥搕emperature (P鈥?i>T) diagram are determined using a versatile pressure鈥搗olume鈥搕emperature (PVT) setup. The addition of an alkane solvent to the CO₂鈥揾eavy oil system tends to expand the pressure and temperature span of the L₁L₂V phase boundary, while the L₁L₂V phase boundary of the solvent(s)鈥揅O₂鈥揾eavy oil system shows its tendency to move toward the high-temperature and low-pressure region of the P鈥?i>T diagram. Theoretically, the previously developed binary interaction parameter (BIP) correlations for CO₂鈥揾eavy oil binary, C₃H₈鈥揾eavy oil binary, and n-C₄H₁₀鈥揾eavy oil binary are incorporated into the Peng鈥揜obinson equation of state (PR EOS) to determine the three-phase boundaries of the above-mentioned systems. The PR EOS with a modified 伪 function and the BIP correlations is found to provide a generally good prediction of the experimentally measured L₁L₂V phase boundaries of the solvent(s)鈥揅O₂鈥揾eavy oil systems under reservoir conditions.