聚表剂/S二元复合体系评价及驱油实验  

Properties evaluation of surface-active polymer/surfactant and oil displacement experiment

作　　者：任刚[1,2,3] 李宜强[1,2,3,4] 余昭艳[2,3,4] 王超群 陈刚[5] 

机构地区：[1]中国石油大学(北京)石油工程学院,北京102249 [2]中国石油大学(北京)石油工程教育部重点实验室,北京102249 [3]中国石油天然气集团公司三次采油重点实验室,北京102249 [4]中国石油大学(北京)提高采收率研究院,北京102249 [5]中国石油大庆油田有限公司第一采油厂,黑龙江大庆163000

出　　处：《断块油气田》2015年第5期623-626,共4页Fault-Block Oil & Gas Field

基　　金：国家自然基金面上项目"三元复合驱微观剩余油赋存状态及形成机理"(51374221)

摘　　要：利用室内实验方法研究了聚表剂/S二元复合体系的界面性能、增黏性能、微观结构、乳化性能,据此评价聚表剂二元驱的相关性质,同时进行了聚驱后聚表剂/S二元体系与聚合物/S二元体系驱油效果对比,研究聚表剂/S二元体系的驱油潜力。研究结果表明:含有高质量浓度的聚表剂/S二元体系比含有低质量浓度的聚表剂/S二元体系的界面张力更小,黏度更大,乳化性能更稳定;聚表剂分子具有独特的"网状"结构,分子线团尺寸远大于普通聚合物,使其具有更好的液流转向能力;驱油实验表明,聚驱后聚表剂/S二元体系主段塞提高采收率幅度比聚合物/S二元体系主段塞高11.48百分点,说明聚驱后聚表剂体系有很大的潜力。因此,聚驱后的剩余油可以采用聚表剂/S二元体系进行开发。To evaluate the properties of surface-active polymer/surfactant system, the interfacial tension, increasing viscosity,microstructure and emulsifying performance of surface-active polymer/surfactant have been researched in lab. Comparing surfaceactive polymer/surfactant flooding with ordinary SP flooding, the result shows that the interfacial tension with high concentration of surface-active polymer in surface-active polymer/surfactant system is smaller than that of the system with low concentration of surfaceactive polymer, the viscosity is opposite, the emulsifying performance is stable; the surface-active polymer molecule has a unique ＂mesh＂ structure and the molecular thread size is greater than ordinary polymers′, which makes it a better fluid flow ability;oil displacement experiments show that oil recovery of main slug of surface-active polymer/surfactant system is 11.48% higher than that of the main slug of ordinary SP, this suggests that surface-active polymer system has a great potential after polymer flooding,therefore the remaining oil after polymer flooding can be developed by surface-active polymer/surfactant system.

关 键 词：聚表剂/S二元体系 界面张力 黏度 微观结构 乳化 提高采收率 

分 类 号：TE357.4[石油与天然气工程—油气田开发工程]