驱油用表面活性聚合物研制及其性能评价  

DEVELOPMENT AND PERFORMANCE EVALUATION OF SURFACE-ACTIVITY POLYMER FOR OIL FLOODING

作　　者：李伟[1] 刘平德[2,3] 王洪关[2,3] 张松[2,3] 熊春明[2,3] 

机构地区：[1]中国科学院渗流流体力学研究所,河北廊坊065007 [2]中国石油天然气集团公司采油采气重点实验室,北京100083 [3]中国石油勘探开发研究院,北京100083

出　　处：《大庆石油地质与开发》2012年第2期152-156,共5页Petroleum Geology & Oilfield Development in Daqing

基　　金：“十一五”国家重大专项“大型油气田及煤层气开发”中“高含水油田提高采收率新技术”项目的子课题“高效深部液流转向与厚油层控水挖潜配套技术”（008ZX05010-004）资助.

摘　　要：从分子结构与性能关系人手，设计了具有降低油水界面张力能力强、空间位阻较小等特点的可聚合表面活性单体。采用低温引发体系，控制聚合温度，将可聚合表面活性单体与丙烯酰胺合成了一种新型驱油用表面活性聚合物，并利用红外光谱、原子力显微镜、冷冻刻蚀电镜，对其进行了结构表征。研究表明：表面活性聚合物在不同水质中具有良好的增黏性、表面活性、热稳定性；解决了色谱分离效应，又具有降低油水界面张力的能力，界面张力可达10^-1mN／m；与普通聚丙烯酰胺相比，表面活性聚合物具有较高的采收率，能在一定程度上洗掉孔道中的残余油，克服了现有调驱剂波及效率和洗油效率不能兼顾的问题。From views of the relations between the molecular structures and properties, the can-be-polymerized surface-activity monomer is designed, which is characterized by stronger capacity to reduce WOC tension, smaller steric property and so on. Adopting low-temperature initiating system, through controlling the polymerization tem- perature, the above monomer can be synthesized with acrylamide into a new-type surface-activity polymers for oil flooding and furthermore with the help of infrared spectrum, atomic force microscopy, freezing-etching electronic microscopy, the structures are characterized. The studies show that there are much better viscosifying property, surface activity and thermal stability in different water qualities; and the chromatographic fractionation effects are solved, and furthermore the oil-water interfacial （WOC） tension can be lowered, the interracial tension is up to 10 -1 mN/m; comparing with the ordinary HPAM, the polymer possesses pretty higher oil recovery and in a certain extent it can wash off the residual oil in channels, therefore the problems of the swept and oil flooded efficiencies ofthe current profile-controlling and adjusting agent can be taken into account. .

关 键 词：表面活性 聚合物 界面张力 采收率 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]