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

任刚 3 李宜强 4 余昭艳 4 王超群⁵ 陈刚⁵

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

College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing 102249, China Key Laboratory of Enhanced Oil Recovery, CNPC, Beijing 102249, China Enhanced Oil Recovery Institute, China University of Petroleum, Beijing 102249, China No.1 Oil Production Plant, Daqing Oilfield Co. Ltd., PetroChina, Daqing 163000, China

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 surface-active 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 surface-active 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.

10.6056/dkyqt201505017