a b s t r a c t
This work consists of a combined experimental and modeling study for oil e MEG e water systems, of relevance to petroleum applications. We present new experimental liquideliquid equilibrium data for the mutual solubility of two North Sea oils ? MEG and North Sea oils ? MEG ? water systems in the
temperature range 303.15e323.15 K and at atmospheric pressure. These new data are for North Sea oils
which are substantially heavier and with higher aromatic/naphthenic content compared to previous
studies. The new data compare favorably with previously reported measurements for other North Sea
oils. The data have been successfully modeled using the Cubic- Plus-Association (CPA) equation of state
(EoS) using a previously developed characterization method and new correlations for estimating binary
interaction parameters between MEG-hydrocarbons and water-hydrocarbons. The results are in satis-
factory agreement to the experimental data, considering especially the complexity of the studied
reservoir fluids, in particular their heavy and aromatic character.
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