新型表面活性聚合物驱油剂  

A novel surface active polymer oil displacement agent

作　　者：刘平德[1,2] 张松[1,2] 杨宁[1,2] 熊春明[1,2] 

机构地区：[1]中国石油勘探开发研究院 [2]中国石油天然气集团公司采油采气重点实验室

出　　处：《石油勘探与开发》2012年第5期580-584,共5页Petroleum Exploration and Development

基　　金：国家科技重大专项"高效深部液流转向与调驱和精细分层注采技术"(2011ZX05010-003)

摘　　要：从分子结构与性能关系入手,研发了具有低界面张力、可聚合的表面活性单体,将可聚合表面活性单体与丙烯酰胺进行共聚,采用复合引发体系、控制低温聚合的方法合成了一种新型表面活性聚合物驱油剂,并利用红外光谱、冷冻蚀刻电镜技术对其结构及其在溶液中的分布状态进行了表征。研究结果表明,可聚合表面活性单体与丙烯酰胺参与了接枝共聚,因而克服了色谱分离效应,新型表面活性聚合物驱油剂在不同水质中具有良好的水溶性、增黏性、耐温抗盐性与抗剪切性能,同时具有较低的油水界面张力,质量分数为0.15%的聚合物溶液与大庆采油一厂原油的界面张力达到1×10 1mN/m数量级。岩心驱油实验表明:新型表面活性聚合物驱油剂具有较好的增黏性及较低的油水界面张力,采收率较普通水解聚丙烯酰胺提高了5.2%。Based on the relationship between the molecule structure of monomers and their performance, two types of polymerizable monomers with low oil/water interfacial tension have been synthesized, which coplymerizes acrylamide to create a novel polymer oil displacement agent under complex initiator and low polymeric temperature. Its structure and distribution status in brine solution were characterized by infrared spectroscopy and freeze etching electron microscope. The results show that the polymer has good water solubility, viscosifying properties, salt-resistance and temperature-tolerance, sheafing-resistance in brines. Due to the graft polymerization of acrylamide and the polymerizable surface-active monomer, the polymer overcomes chromatographic separation effect, and has low oil/water interfaeial tension. Interfacial tension of 0.15% solution of the polymer （prepared in Daqing simulation brine） is around 10^-l mN/m in Daqing No. 1 oil plant crude oil. Core flooding experiments show that the oil recovery of the novel surface active polymer is 5.2% higher than that of ordinary hydrolyzed polyacrylamide because of its better viscosifying performance and lower oil/water interracial tension.

关 键 词：驱油剂 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]