Abstract: The rheological characteristics of high waxy oil and water system in different condition were studied, which provided theoretical support for produced fluid of high pourpoint oil gathering and transferring. Oilwater viscosity distribution characteristics were measured under different conditions with VT550 viscometer. Effection of temperature and water cut on thixotropic and dilution shearing characteristics was obtained. Oil and water distribution with different water cut was observation using CCDADAPTER micro meter. The results show that the higher the temperature, the smaller the yield stress. With the temperature increasing, the dropping speed of yield stress becomes smaller. When water cut of the oil/water system is high, the apparent viscosity is still low even the temperature is below freezing point. The more close to the freezing point temperature, the more close to the phase inversion point moisture content, the more obvious shear thinning characteristic, the stronger the nonNewtonian fluid properties are. When the water cut is near the phase inversion point, water phase is distributed in the oil phase with uniform and dense form, which leads to the huge apparent viscosity.

Key words: Waxy crude,    ,  Oil and water system,     ,  Rheological property,   , Shear thinning behavior

摘要： 研究了不同条件下高含蜡油水体系的流变特性, 为高凝油采出液油田集输提供理论支撑。采用 VT 5 5 0黏度仪测定不同条件下的油水黏度分布特性, 得到了不同温度下原油的触变特性及不同温度、 不同含水率下 的剪切稀释特性, 并通过C C D - ADA P T E R显微测定仪观测得到不同含水率下的油水分布情况。研究结果表明, 高 凝油温度越高于凝点, 屈服应力越小, 且随温度升高, 屈服应力下降幅度越小; 高含水下油水体系即使温度低于凝 点, 其表观黏度仍较低; 温度越接近于凝点, 含水率越接近于转相点, 剪切稀释性越明显, 非牛顿流体特性越明显; 含 水率在转相点附近时, 水相以均匀、 密集的分散相形式分布于油相中, 致使体系表观黏度较大。

关键词: 含蜡原油, 油水体系,  , 流变性, 剪切稀释性