A systematic and consistent approach to determine binary interaction coefficients for the Peng-Robinson equation of state

Journal Article · Wed Nov 01 04:00:00 EST 1989 · SPE (Society of Petroleum Engineers) Reservoir Engineering; (USA)

DOI:https://doi.org/10.2118/16941-PA· OSTI ID:5275984

Slot-Petersen, C ^[1]

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1. Dansk Operatorselskab I/S (DK)

A new technique to determine binary interaction coefficients for a cubic equation of state (EOS) is introduced. The technique is physically consistent and easy to apply when an EOS is tuned to laboratory-measured PVT data. The method's simplicity provides a rational way of evaluating the sensitivity of binary interaction coefficients to fluid composition and temperature. Laboratory-measured expansion data are demonstrated to be crucial for proper determination of binary interaction coefficients for near-critical fluids. The ability of the technique has been demonstrated by matching laboratory-measured constant-composition-expansion curves for six fluid compositions, including black-oil, volatile-oil, rich-gas-condensate, and lean-gas-condensate systems. In addition, the near-critical fluid behavior has been evaluated by matching constant-composition expansion data for a fluid at four temperatures in the near-critical range, two on either side of the critical temperature. The literature reports that the Peng-Robinson EOS (PR-EOS) cannot predict the retrograde phase behavior of the rich-gas-condensate fluids applied in this study. This paper shows that this is because insufficient and/or improper binary interaction coefficients were used in the fluid characterization.

• OSTI ID: 5275984
• Journal Information: SPE (Society of Petroleum Engineers) Reservoir Engineering; (USA), Journal Name: SPE (Society of Petroleum Engineers) Reservoir Engineering; (USA) Vol. 4:4; ISSN SREEE; ISSN 0885-9248
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300 -- Petroleum-- Drilling & Production
023000* -- Petroleum-- Properties & Composition
BINARY MIXTURES
CALCULATION METHODS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CONDENSATES
DISPERSIONS
DRILLING FLUIDS
ENERGY SOURCES
ENHANCED RECOVERY
EQUATIONS
EQUATIONS OF STATE
FLUIDS
FOSSIL FUELS
FUELS
GAS CONDENSATES
LIQUIDS
MIXTURES
NATURAL GAS LIQUIDS
PETROLEUM
PHASE STUDIES
RECOVERY