界面性质表征二元驱驱油剂对采出液稳定性的影响  

Influence of oil-displacing agent on stability of crude oil emulsions characterized by interfacial properties

作　　者：王玮[1] 李美蓉 毛雷霆[1] 李浩程[1] 赵娜娜 黄漫 

机构地区：[1]中国石化胜利油田胜利勘察设计有限公司 [2]中国石油大学(华东)理学院

出　　处：《石油与天然气化工》2013年第2期160-164,共5页Chemical engineering of oil & gas

基　　金：国家科技重大专项"高温高盐油藏化学驱采出液处理技术研究"(2008ZX05011-005)

摘　　要：通过破乳脱水实验及界面性质研究了HPAM、吡咯林及其二元驱体系对原油乳状液稳定性的影响。实验结果表明:加入浓度为100mg/L不同驱油剂后均使破乳剂BSE-238对原油乳状液的脱水率降低15%以上,SV值均增大,不同驱油剂均增强了原油乳状液的稳定性。含驱油剂的乳状液体系破乳后水相电导率增大、Zeta电位负值增大,破乳脱出水中含油量增大、油滴粒径减小。不同驱油剂影响乳状液稳定性的机理不同:HPAM对体系界面张力无明显影响,是通过增大体系黏度增强其稳定性;吡咯林对乳状液体系黏度无影响,大大降低油水界面张力而增强乳状液稳定性;两种驱油剂协同作用,使二元驱采出液更加稳定。The influence of HPAM, pyrrolin and pyrrolin/HPAM system on the stability of crude oil emulsion was studied through dehydration and interracial properties experiment in this paper. The result indicated that when different oil-displacing agents with concentration of 100 mg/L were added in emulsion, the dehydration rate decreased by 15% and the SV value in- creased, the stability of crude oil emulsion was strengthened by all oil displacing agents. The conductivity and Zeta potential value of the water phase increased with demulsification, the medi- an size of oil droplets decreased, then the coalescence of oil droplets was difficult. The stability mechanism of different oil-displacing agents was different. HPAM had no obvious influence on interracial tension but made the emulsion stable by increasing its viscosity; however, pyrro｜in greatly reduced the interracial tension and had no influence on viscosity. The synergistic effects of the two oil-displacing agents made the emulsion more stable.

关 键 词：驱油剂 脱水率 界面张力 ZETA电位 稳定性 

分 类 号：TE39[石油与天然气工程—油气田开发工程]