Viscosity models for bitumen–solvent mixtures

Abstract Viscosity is the resistance of a material to continuous deformation exerted by shear force. High viscosity, which sometimes greater than 1 million mPa s, at initial reservoir conditions, major challenge recovery, production, and transportation bitumen. Addition organic solvents or diluents with bitumen leads significant viscosity reduction forms basis for steam/solvent-assisted recovery methods extra-heavy oil Therefore, modeling predicting bitumen–solvent mixture has become an important step in development solvent-assisted system. The aim this article present concise survey various models that have been proposed predict mixtures, make comparative discussion on their applicability. Available reports revealed accuracy model mixtures depends factors including type concentration solvents, properties Thus, no found absolute capability all mixtures. there room further improvement system wider applications.