The objective of this study is to present a review of eight equations of state (EOS’s) and compare their ability to predict the volumetric and phase equilibria of gas-condensate systems. Included in the study are the Peng-Robinson (PR), the Soave-Redlich-Kwong (SRK), the Schmidt-Wenzel (SW), the Usdin-McAuliffe (UM), the Heyen, the Kubic, the Adachi-Lu (AL), and the Patel-Teja (PT) EOS’s. The SW equation exhibits a superior predictive capability for volumetric properties of condensate systems. The PR equation is found to represent the phase equilibrium behavior of condensate systems accurately. In terms of compressibility factors, the SW and PT equations give better predictions than other equations.

Keywords:
fraction, eos, predictive capability, coefficient, expression, prediction, chern, calculation, upstream oil & gas, hydrocarbon system
Subjects:
Fluid Characterization, Fluid modeling, equations of state, Gas-condensate reservoirs, Phase behavior and PVT measurements, Unconventional and Complex Reservoirs
Copyright 1988, Society of Petroleum Engineers
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