低碱浓度非离子表面活性剂驱油体系界面张力研究  

INTERFACIAL TENSIONS OF NONIONIC SURFACTANT FLOODING SOLUTION WITH LOW ALKALI CONCENTRATION FOR WENMINGZHAI OIL FIELDS

作　　者：赵普春[1,2] 酒尚利[1,2] 张敬武 赵化廷[1,2] 康万利 

机构地区：[1]中原油田采油三厂 [2]大庆石油学院提高采收率研究所

出　　处：《油田化学》1998年第2期150-154,共5页Oilfield Chemistry

摘　　要：虑到中原文明寨油藏高温、高矿化度、高钙镁含量的特点及注入水的高ｐＨ值（８—９．５），选择含有低浓度（０．０２５％）Ｎａ２ＣＯ３的非离子表面活性剂ＮＳ溶液为驱油剂，考察了该体系与文明寨原油之间的界面张力，在天然岩心上进行了驱油实验，在水驱基础上使采收率提高了１０％和７．６％。aking into consideration hostile reservoir conditions and alkalinity of injection water (pH value 8-9.5) in Wenmingzhai Oil Fields, 0.3-0.5% NS solution in oilfield produced water containing 0.025% Na2CO3 is selected for EOR. NS is a nonionic surfactant, chemically fatty acid arkanol amide polyglycol ether. The interfacial tensions between the solution and the crude oil are investigated as influenced by NS concentration, temperature, measuring time, amout of salt (NaCl) added, and longterm standing and low values of 10-2-103 mN/m are observed at 65-80℃. In oildisplacing experiments oil recoveries are enhanced by 10.0% and 7.65 on two natural cores waterflooded to the extent of 98% water cut.

关 键 词：表面活性剂 驱油 界面张力 非离子型 油田 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]