A Modified Equation of State for Gas-Condensate Systems

M. Erdogmus, Michael A. Adewumi

Research output: Contribution to conferencePaper

2 Citations (Scopus)

Abstract

Accurate prediction of thermophysical properties is an essential requirement for optimum design and operation of most process equipment involved in petroleum production, transportation, and processing. Equipment failure is often directly attributed to lack of accurate design data. Methods of fluid property prediction can be divided into three main categories, namely the Corresponding States Theory (CST), Equation of State (EOS) model, and Activity Coefficient Model (ACM). The EOS approach is most popularly used for natural gas systems due to its applicability at high pressures for both liquid and vapor phases. Probably the most successful cubic equation of state for natural gas property calculation is the one proposed by Peng and Robinson (PR) 1. However, Peng-Robinson EOS assumes a fixed value of critical compressibility factor and, as a result, the predicted densities of the saturated liquids and the predicted critical volumes differ considerably from experimental values. Patel and Teja (PT) 2 introduced a substance dependent critical compressibility factor that allowed them to more accurately reproduce the experimental saturated liquid volume at a particular temperature. The present work is an extension of that of Patel and Teja. The modified Patel and Teja's EOS improves the prediction of liquid phase density and vapor liquid equilibrium. A comprehensive assessment of the modified equation-of-state is conducted through performance comparison with the more popular equations of state. For saturated liquid volume predictions, the improved equation of state yields 33% and 11% improvement over PR and PT EOS, respectively. For vaporization equilibrium ratio predictions, 36% improvement over PR and 67% improvement over PT EOS are observed.

Original languageEnglish (US)
Pages123-130
Number of pages8
StatePublished - Dec 1 2000
EventProceedings - SPE Eastern Regional Meeting - Morgantown, WV, United States
Duration: Oct 17 2000Oct 19 2000

Other

OtherProceedings - SPE Eastern Regional Meeting
CountryUnited States
CityMorgantown, WV
Period10/17/0010/19/00

Fingerprint

Gas condensates
Equations of state
Liquids
Compressibility
Natural gas
Activity coefficients
Vaporization
Phase equilibria
Thermodynamic properties
Crude oil
Vapors

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Erdogmus, M., & Adewumi, M. A. (2000). A Modified Equation of State for Gas-Condensate Systems. 123-130. Paper presented at Proceedings - SPE Eastern Regional Meeting, Morgantown, WV, United States.
Erdogmus, M. ; Adewumi, Michael A. / A Modified Equation of State for Gas-Condensate Systems. Paper presented at Proceedings - SPE Eastern Regional Meeting, Morgantown, WV, United States.8 p.
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Erdogmus, M & Adewumi, MA 2000, 'A Modified Equation of State for Gas-Condensate Systems', Paper presented at Proceedings - SPE Eastern Regional Meeting, Morgantown, WV, United States, 10/17/00 - 10/19/00 pp. 123-130.

A Modified Equation of State for Gas-Condensate Systems. / Erdogmus, M.; Adewumi, Michael A.

2000. 123-130 Paper presented at Proceedings - SPE Eastern Regional Meeting, Morgantown, WV, United States.

Research output: Contribution to conferencePaper

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Erdogmus M, Adewumi MA. A Modified Equation of State for Gas-Condensate Systems. 2000. Paper presented at Proceedings - SPE Eastern Regional Meeting, Morgantown, WV, United States.