摘要
油水两相流广泛存在于油田生产中,其流动黏度的准确测定直接影响集输工艺设计的合理性与运行管理的科学性,但现有技术尚不能满足其快捷与准确测定的需要。为此,分别以二甲基硅油、吉7稠油和CZ27稠油为油相,自来水为水相,制备不同的油水不相溶体系;采用Anton-Paar Rheolab QC同轴圆筒流变仪及配套DIN53019转子系统,测试其流变特性;分析含水率、温度和剪切速率对油水不相溶体系流变特性的影响,建立相应的流变模型。结果表明,高黏度油相与水组成的油水不相溶体系在本实验剪切速率范围内表现出与纯油相相同的流变特征;根据含水率的不同,表观黏度变化趋势可分为四个区间：含水0数40%的无影响区,40%数55%的线性变化区,55%数75%的波动区,75%数93%的线性变化区;二甲硅油及其油水不相溶体系表现为牛顿流体流变特性,而乳化稠油及其油水不相溶体系表现为剪切稀释性。
Oil water two-phase flow is one of the main flow phenomena in heavy oil development process, and the accurate measurement of its viscosity matters the scientific design and reasonable administration of the whole pipeline. However, the technology nowadays cannot solve the problem conveniently and accurately. Dimethyl silicone oil, J7 crude oil and CZ27 crude oil were separatelyused as oil phase, tap water as water phase to produce oil-water immiscible systems. The rheological properties of high viscosity oil-water immiscible system was measured by adopting Anton-PaarRheolabQC coaxialrotational viscometer with its DIN 53019 cylinder. The effects of water content, type of oil phase, temperature and shear rate on theological properties were studied through statistically analysis, and the equations were established to predict the rheological properties of off-water immiscible system. The results showed that the high viscosity oil-water immiscible system exhibited the same rheological properties as the pure oil. The apparent viscosity developing trend could be divided into four sections according to its water cut： 0---40% water cut non-affected region, 40%--55%water cut linear variation region, 55%--75% water cut fluctuation region and 75%--93%water cut linear variation region. Dimethyl silicone oil and it＇s oil-water immiscible system showed Newtonian fluid properties, while the emulsified heavy oil and it＇s oil -water immiscible system presented shear thinning behavior.
出处
《油田化学》
CAS
CSCD
北大核心
2016年第1期170-175,共6页
Oilfield Chemistry
基金
高等学校博士学科点专项科研基金"稠油掺水流动黏度测定及压降预测研究"(项目编号20115121110004)
关键词
稠油
两相流
黏度
非牛顿流体
流变学
heavy oil
two-phaseflow
viscosity
non-Newtonianflttids
rheology
