低渗透油藏驱油用表面活性剂的性能评价  

The Performance of A Surfactant Used for EOR in Low Permeability Reservoirs

作　　者：程晓宁[1] 罗跃[1] 杨欢[1] 

机构地区：[1]长江大学化学与环境工程学院,湖北荆州434023

出　　处：《长江大学学报（自然科学版）》2011年第12期53-55,10,共3页Journal of Yangtze University(Natural Science Edition)

摘　　要：针对长庆某区块油田注水驱替效率低,开展了表面活性剂在低渗油层采收率试验研究,合成了一种表面活性剂并进行了性能研究。研究结果表明,在25℃条件下,活性剂的临界胶束浓度为100mg/L;考察了无机盐加量对表面活性剂活性的影响,无机电解质浓度越高,溶液的表面张力越小;在65℃条件下,表面活性剂油水界面张力可达到10-2 mN/m数量级;油砂对表面活性剂的吸附量较小。岩心驱油降模拟试验表明,在表面活性剂体系驱替1.0倍孔隙体积之后,提高采收率达4.52%。Aiming at the problem of low displacement efficiency in Changqing Oilfield,laboratory research on recovery ratio of surfactant is in process,it synthezes a surfactan and its performance is evaluated.Laboratory experimental results indicate that the critical micelle concentration of surfactant is 100mg/L at 25℃.The surface tension is lower with the increase of the inorganic salts concentration,the interfacial tension between oil and water is below 10-2mN/m at 65℃.Sands have a small adsorption of surfactant.Core simulation experiments show that the recovery ratio can increase by 4.52% after surfactant drive(1.0PV).

关 键 词：表面活性剂 低渗油藏 提高采收率 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]