Abstract
In this paper, several crude oil viscosity reducers were selected to evaluate their performance on the heavy oil Henan Oilfield, China. Through investigation, the viscosity reducing ability of these viscosity reducers were relatively general. Among them, EVA had the highest performance, reaching a viscosity reduction rate of 45.6%. The results were characterized by DSC analysis, wax crystal micromorphology analysis of saturated hydrocarbons and IR spectroscopy. Finally, possible viscosity reduction mechanism was discussed.
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