Fundamentals of Fluid Flow in Porous Media
Multiple Contact Miscibility Processes
An injected solvent which is not miscible with oil at first contact may achieve miscibility during multiple contacts and mass transfer between reservoir oil and injected fluid. In-situ mass transfer of intermediate molecular weight components between gas and oil phases results in mixtures that are miscible with either the injected solvent or initial oil phases. The multiple contact miscibility are categorized as ‘vaporizing gas drive’ (VGD), ‘condensing’, ‘condensing/vaporizing-gas’ (enriched gas) and CO2 displacement.