Abstract: The viscosity of heavy oil is high, the pipeline transportation is difficult, and the viscosity decreases greatly after dissolved gas. Thus researching viscosity-reducing properties of dispersion system of heavy oil with dissolved gas is of great significance to the actual pipeline operation. The viscosity-reducing mechanisms, viscosity models and influence factors of heavy oil with dissolved gas are summarized. The research indicates that dilution micelle damage, swelling, molecular force and micro-bubbles effect can reduce the viscosity of dispersion system. Viscosity models are mainly established by Shu, Abivin and so on, and the defects in the model are presented. The property of oil and gas, temperature, pressure, the amount of dissolved gas and micro-bubbles have different effects on the system's viscosity, and the direction of the heavy oil with dissolved gas is proposed.

Key words: Heavy oil with dissolved gas, Viscosity, Dispersion system, Micro-bubbles

摘要： 稠油黏度高，管输难度大，溶气后其黏度大幅降低，研究溶气稠油分散体系的降黏特性对管道实际运行具有重要指导意义。综述稠油溶气的降黏机理、黏度模型和影响因素，发现稀释作用、胶团破坏作用、溶胀作用、分子力作用、微气泡作用可降低体系黏度；黏度模型主要为Shu、Abivin等建立的相关模型，提出模型所存在的缺陷；油气性质、温度、压力、溶气量、微气泡特性等因素对体系黏度产生不同程度的影响，提出溶气稠油的研究与发展方向。

关键词: 溶气稠油, 黏度, 分散体系, 微气泡