The hard-core effect on PC-SAFT to model asphaltene precipitation in petroleum reservoir fluids

被引：0
作者：
Canas-Marin, Wilson A. [1 ]
Hoyos, Bibian A. [1 ]
Gonzalez, Doris L. [2 ]
机构：
[1] Univ Nacl Colombia, Fac Minas, Dept Proc & Energia, Sede Medellin, Carrera 80 65-223, Medellin 050041, Colombia
[2] Integrated Modern Energy Solut LLC Inmenso, Houston, TX USA
来源：
FLUID PHASE EQUILIBRIA | 2022年 / 563卷
关键词：
PC; SAFT; Hard-core; Second -order term; Effective diameter; Asphaltene onset pressure; Petroleum reservoir fluids; EQUATION-OF-STATE; DIRECTIONAL ATTRACTIVE FORCES; DER-WAALS THEORY; PERTURBATION-THEORY; HIGH-PRESSURE; PHASE-EQUILIBRIA; CHAIN MOLECULES; TEMPERATURE; PREDICTION; BEHAVIOR;
D O I：
10.1016/j.fluid.2022.113590
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
In this work, a hard-core version of the Perturbed Chain-Association Fluid Theory Equation of State (PC-SAFT EoS) is proposed and used to predict upper asphaltene onset pressures (AOPs), bubble points (BPs), and precipitated asphaltene amounts for eighteen real petroleum reservoir fluids around the world. As a result, for the same assumed asphaltene molecular weight (MW) value, this hard-core PC-SAFT model predicts lower AOPs than the other two PC-SAFT versions here tested, including the original version of PC-SAFT. The AOPs and precipitated asphaltene amounts are found to be directly related to the asphaltene MW values used for each PC-SAFT model. The hard-core PC-SAFT model here presented is the PC-SAFT version that requires the lowest asphaltene MWs and predicts the lowest precipitated asphaltene amounts for the eighteen fluids modeled.
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页数：11
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