摘要
以国内某油田稠油及其乳状液为研究对象,采用Anton Paar MCR 302可视化流变仪对其黏温特性和流变性进行研究。测量了稠油在不同温度下的黏度,以及不同含水率、温度及剪切速率下该稠油乳状液的表观黏度,根据实验结果对其关系进行综合分析,并观察反相点附近的稠油乳状液微观形态。结果表明,该稠油的黏温特性在测量范围内能较好的符合Arrhenius方程,稠油乳状液黏度与含水率、温度的综合关系能够符合对数关系模型,在不同的含水率下,稠油乳状液黏度公式Richardson公式中的k值是关于温度的函数,从微观上可以证明该稠油样品的反相点在40%~50%之间,另外,剪切速率对稠油乳状液黏度的影响随温度的变化而变化。因此,对稠油乳化降黏输送时需考虑温度、含水率及剪切速率等多种因素的影响。
The viscosity-temperature characteristics and rheological characteristics of heavy oil and its emulsion in a domestic oilfield were researched by using Anton Paar MCR 302 rotary viscometer.The viscosity of heavy oil at different temperatures and the apparent viscosity of heavy oil emulsion at different temperatures,rates of water content and shear rates were measured,the relationships of them were analyzed.In addition,the microcosmic morphology of heavy oil emulsion with the water content being close to the inverting point of heavy oil was observed.The results showed that viscosity-temperature characteristics of heavy oil conformed to Arrhenius equation well in measuring range.The relationship of the viscosity of heavy oil emulsion,water content and temperature could fit the logarithmic model.The k of Richardson equation which is the viscosity formula of heavy oil emulsion is a function of temperature at different rates of water content.The result that the inverting point of the heavy oil sample was between 40%and 50%was confirmed from the microscopic point.In addition,the influence of the shear rate on the viscosity of heavy oil emulsion varied with temperature.Therefore,various factors such as temperature,rate of water content and shear rate should be considered when transporting heavy oil which was emulsified to reduce its viscosity.
作者
张嘉
罗浩勇
ZHANG Jia;LUO Hao-yong(CNOOC Ningbo Daxie Petrochemical Co.,Ltd.,Ningbo Zhejiang 315812,China)
出处
《当代化工》
CAS
2020年第6期1150-1153,1165,共5页
Contemporary Chemical Industry
作者简介
张嘉(1989-),男,上海市人,助理工程师,硕士,研究方向:工程设计。E-mail:zhangjia4@cnooc.com.cn
