摘要
稠油形成的高内相W/O乳状液,其流动性对生产有很大影响,研究表明W/O乳状液流动特征可以用幂律模式描述,具有剪切稀释性,粘度与温度服从指数关系。随着内相体积浓度的增大,乳状液粘度会出现一个最大值,此时的内相体积浓就是乳状液的转相点。在内相体积浓度小于转相点时,粘度随内相体积浓度的增大粘度增大;在内相体积浓度大于转相点时,粘度随着内相体积浓度的增大粘度下降。在内相体积浓度大于转相点后,乳状液会由W/O型转变为O/W型,转相有一个过程。同时随着内相体积的增大、剪切速率的增大和温度的升高乳状液稳定性下降。高内相乳状液已经具有了粘弹流体的某些特征。本次研究在稠油生产中具有一定的理论意义。
The high internal phase W/O emulsion formed in heavy oil tremendously influences the production. The research indicates that W/O emulsion rheological property can be descriped by power law pattern. It has the shear-thinning nature. there is the index relation between viscosity and temperature . as the increase of internal phase volume concentration, the viscosity of the emulsion reaches a maximum. The internal phase volume concentration corresponding the maximum of the emulsion viscosity is the transforming phase volume concentration. When the internal phase volume concentration is smaller than the transforming phase volume concentration, the increase of the internal phase volume concentration, the viscosity of the emulsion rises. When the internal phase volume concentration is greater than the transforming phase volume concentration, as the increase of the internal phase volume concentration, the viscosity of the emulsion decreases. After the internal phase volume concentration is greater than the transforming phase volume concentration, the emulsion will be changed to the O/W type from W/O type. As the increase of the internal phase volume concentration and the shear rate and the temperature rising, emulsion stability declines. The high internal phase W/O emulsion is of certain characteristics of viscolelastic fluid.
出处
《西南石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第2期122-124,191,共3页
Journal of Southwest Petroleum University(Science & Technology Edition)
关键词
流变性
高内相
乳状液
稠油
粘度
rheological property
high internal phase
emulsion
heavy oil
viscosity
