油水两相体系流变行为影响因素实验研究

Experimental Study on Influencing Factors for Rheological Behavior of Oil-Water Two-phase Flow

考虑含蜡原油管输过程蜡的沉积机制不但与油水两相体系的乳化特征有关,也相关于两相体系的流变行为,分析了油水体系的乳化转相特征及流变特性,结果表明,除了原油自身组成,温度和含水率是影响油水两相体系流变行为的主要因素,实验油水两相体系的转相点含水率值约为55%,通过确定温度及含水率影响下油水两相体系的流变指数n与稠度系数K,明确了基于幂律斱程描述集输工况环境下油水两相体系流变特性的可行性。

Considering the influence of emulsification and rheological behavior of oil-water two-phase flow on wax-deposition mechanism of waxy crude during pipeline transportation, the phase inversion and rheological properties were tested. The results indicated that, besides the composition of crude oil, temperature and water-cut were the main influencing factors of rheological behavior. The water-cut of oil-water two-phase flow for the emulsification and phase inversion was 55%, and the rheological index and consistency coefficient of oil-water two-phase flow at different temperature were also determined. Furthermore, the feasibility of using power law equation to describe the rheological properties of oil-water two-phase flow in gathering and transportation environment was verified.