油相中有机酸与石蜡对乳液稳定性的协同影响机理探究
Mechanistic Study of the Synergistic Effects of Organic Acids and Paraffin Wax in Model Crude Oil on the Stability of Its Emulsion
郝宝健 1欧桂芳 2孙广宇3
作者信息
- 1. 中国石油(阿曼)5区公司 北京 100034
- 2. 海洋石油工程(青岛)有限公司 山东 266520
- 3. 中国石油大学(华东)储运与建筑工程学院 山东 266580
- 折叠
摘要
我国所产原油中通常含有机酸和石蜡,其对原油流变性及乳液稳定性有重要影响.以有机酸类型/体积分数和石蜡质量分数对模拟油乳液稳定性的影响为切入点,通过胶凝特性、乳液分油率、界面表征等实验手段进行探究.结果表明:在模拟油含蜡量为5%时,十二酸、十六酸、十八酸、十二烷基苯磺酸(Dodecyl Benzene Sulphonic Acid,DBSA)乳液的分油率依次为 65.91%、61.36%、63.04%、0%,说明DBSA稳定乳液的能力最强,十六酸和十八酸次之,十二酸最差;在所有实验蜡质量分数下,DBSA乳液在180 min内分油率均为0,表明DBSA对不同含蜡量模拟油乳液均具有较好的稳定效果,而其余含有机酸模拟油需要在一定蜡质量分数范围内才能成功乳化,蜡质量分数过高或过低均不能成功乳化.
Abstract
The presence of organic acids and waxes is common in the crude oils produced in China.They have a significant impact on crude oil rheology and emulsion stability.The influence of organic acid and wax on the stability of model oil emulsion is explored by means of gelation characteristics,oil separation rate,and interfacial rheology.The results show that the oil separation rates of the four organic acids emulsion are 65.91%,61.36%,63.04%,and 0%at 5%wax content,respectively.This indicates that DBSA has the strongest ability to stabilize the emulsion,and hexadecanoic acid is the next,while dodecanoic acid is the worst.Under experimental conditions,the oil separation rate of DBSA-emulsion system was 0 within 180 min,showing that DBSA has good stabilizing effect on the waxy oil emulsions.By contrast,successful emulsification of the model crude oils containing the rest organic acids requires an appropriate wax content.Too high or low wax content may result in failure in emulsification.
关键词
有机酸/石蜡/乳液/稳定性/胶凝Key words
organic acid/paraffin wax/emulsion/stability/gelation引用本文复制引用
出版年
2025
NETL
NSTL
万方数据