关键词: 稠油 , 水基降黏剂 , 搅拌法 , 管输模拟 , 评价方法

Abstract: The nonuniform solution exhibited as waterinoil suspension or emulsion produce for the admixture of oil and waterbased viscosity depressant, which brings some potential difficulties to the measurement of viscosity and thus evaluation of viscosity depressants. Agitating method is employed to solve this problem at present. However, this method can't well mimic the effect of pipe flow shearing on rheological behavior of wateroil blend due to the difference in agitating strength from limitation of experimental design. As a result, the evaluation result from this method is generally too far optimistic. For this reason, an improved evaluation method for the performance of waterbased viscosity depressant was proposed, which can simulate the shear and thermal conditions tightly as in a real field. The experiment results reveal that the method has a better performance and provide a solid basis for evaluation for waterbased viscosity depressants. 

Key words: Heavy oil,    ,  Waterbased viscosity depressant,    ,  Agitating,    ,  Pipeline transportation simulation,    ,  Evaluation methods