大庆原油组分在界面膜的扩张流变性质

Interfacial Dilational Rheology of Daqing Crude Oil Fractions

胡嵩霜 司友华 张 磊 张 路

HU Songshuang SI Youhua ZHANG Lei ZHANG Lu

利用悬挂滴的方法系统研究了大庆原油中四种活性组分在煤油-水间界面扩张流变性质，并深入探讨了振荡频率和质量分数的影响。结果表明，实验所用的大庆原油中的四种活性组分表现出较强的界面活性，其降低界面张力能力的顺序为：胶质＞沥青质＞芳香分＞饱和分。随着振荡频率增大，这四种活性组分的扩张模量均增大，而相角均降低。此外，随质量分数增大，实验所用大庆原油中的沥青质的扩张模量线性增加，最大值高达50 mN/m，明显高于其它三种活性组分，也比一般原油中组分的扩张模量高。与此同时，这四种大庆原油活性组分的相角随质量分数增加虽然略有加大，但数值仍然较低，其界面吸附膜表现出较强的弹性行为。图12表1参26

The interfacial dilational rheological properties of the four components of Daqing crude oil at the kerosene-water system were investigated by means of oscillating drop method. The effects of the oscillating frequency and the bulk mass fraction were detected. The experimental results showed that all of the four crude oil components had interfacial active and the order of reducing interfacial tension was as follows，resins＞asphaltenes＞aromatics＞saturates. The dilational modulus of all crude oil fractions increased with increasing frequency while phase angle decreased. With the increase of mass fraction，the dilational modulus of asphaltenes increased linearly，and the maximum dilational modulus could reach about 50 mN/m，which was not only higher than that of the others but also higher than the crude oil fractions in other regions. The phase angle of all crude oil fractions increased with increasing mass fraction and the values were lower，appearing strongly elastic nature.

10.19346/j.cnki.1000-4092.2019.02.012