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We present extensive experimental and modeling studies on phase behavior of DME-brine-crude oil mixtures using the Peng–Robinson equation of state (EOS) with the Huron-Vidal mixing rule to capture the interaction between various components of the mixture. We show that DME has strong preference towards the oil phase as compared to the aqueous phase due to its first contact miscibility with hydrocarbons...
Due to first contact miscibility with hydrocarbons and partial miscibility with water/brine, DME has shown a significant potential for enhanced waterflooding technology that has been developed recently in Shell. To provide a solid foundation for this EOR application, understanding the phase behavior of DME–brine–oil systems is crucial – which is practically non-existent for the conditions of interest...
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