abstract

• Based on the Soave-Redlich-Kwong equation of state, empirical correlations for the K-values of N2, CO2, H2S, C1, and C2 are proposed. Complementarily, the binary interaction coefficients involving the plus fraction, C7 , were optimized by fitting into 131 experimental data from the literature. The criterion to select the form of the empirical correlations was based on the identification of the major dependencies of the equilibrium constants on the system variables (e.g., pressure, temperature, and composition). For most of the experimental data, the saturation pressure calculated via the empirical correlations is in excellent agreement with those reported from the laboratory. The empirical correlations cover a variety of temperatures (128-314°F), pressures (313-6880 psi), and compositions (N2: 0.0-1.67%25; CO2: 0.0-9.11%25; H2S: 0.0-3.68%25; C1: 5.63-74.18%25; C2: 0.84-12.45%25; C7 : 10.72-83.2%25). The proposed correlations are useful for rapid vapor-liquid equilibrium calculations during the compositional modeling of petroleum reservoirs. © 2022 Jose V. Flores-Cano et al.
• Based on the Soave-Redlich-Kwong equation of state, empirical correlations for the K-values of N2, CO2, H2S, C1, and C2 are proposed. Complementarily, the binary interaction coefficients involving the plus fraction, C7%2b, were optimized by fitting into 131 experimental data from the literature. The criterion to select the form of the empirical correlations was based on the identification of the major dependencies of the equilibrium constants on the system variables (e.g., pressure, temperature, and composition). For most of the experimental data, the saturation pressure calculated via the empirical correlations is in excellent agreement with those reported from the laboratory. The empirical correlations cover a variety of temperatures (128-314°F), pressures (313-6880 psi), and compositions (N2: 0.0-1.67%25; CO2: 0.0-9.11%25; H2S: 0.0-3.68%25; C1: 5.63-74.18%25; C2: 0.84-12.45%25; C7%2b: 10.72-83.2%25). The proposed correlations are useful for rapid vapor-liquid equilibrium calculations during the compositional modeling of petroleum reservoirs. © 2022 Jose V. Flores-Cano et al.

authors

• Aguilar-Madera C.G.
• Espinosa-Paredes G.
• Flores-Cano J.V.
• Herrera Hernández Erik César
• Ruelas-Leyva J.P.

publication date

• 2022-01-01

published in

• International Journal of Chemical Engineering  Journal

keywords

• Binary mixtures; Equations of state; Equilibrium constants; Petroleum reservoir engineering; Petroleum reservoirs; Binary interactions; Empirical correlations; Equilibria constants; Interaction coefficient; K-values; Pressure compositions; Saturation pressure; Soave-redlich-kwong equation of state; System variables; Vapor liquid equilibria; Carbon dioxide
• Binary mixtures; Equations of state; Equilibrium constants; Petroleum reservoir engineering; Petroleum reservoirs; Binary interactions; Empirical correlations; Equilibria constants; Interaction coefficient; K-values; Pressure compositions; Saturation pressure; Soave-redlich-kwong equation of state; System variables; Vapor + liquid equilibria; Carbon dioxide

Digital Object Identifier (DOI)

• 10.1155/2022/9260306

PubMed ID

start page

end page

volume

• 2022

issue