PAM/PEI凝胶成胶时间影响因素分析  

Analysis on influence factors on gelation time of PAM/PEI gel system

作　　者：秦义[1,2] 石峥[1] 刘玉莉 程立[1,2] 廖锐全[1,2] 

机构地区：[1]长江大学石油工程学院,湖北武汉430100 [2]中国石油天然气集团公司采油采气重点实验室长江大学分室,湖北武汉430100 [3]中原油田普光分公司,四川达州635000

出　　处：《现代化工》2017年第9期95-98,共4页Modern Chemical Industry

基　　金：国家自然科学基金项目(51404039);中国石油科技创新基金研究项目(2014D-5006-0309)

摘　　要：采用流变法研究了聚合物质量分数、交联剂质量分数、温度、pH、盐离子、阴离子表活剂(SDBS)对PAM/PEI凝胶成胶时间的影响。实验结果表明,聚合物质量分数增加,凝胶成胶时间先增加后降低;而交联剂质量分数增加,凝胶成胶时间逐渐降低,且降低幅度逐渐减小;温度增加,凝胶成胶时间缩短;中性条件下凝胶成胶时间比碱性时长,而酸性条件下凝胶无法成胶;Na^+和Ca^(2+)均会延长凝胶成胶时间,且质量分数越高,成胶时间越长;SDBS会极大地延长凝胶成胶时间,SDBS质量分数为0.2%时,凝胶成胶时间增至50 h左右。The influences of polymer concentration,crosslinker concentration,temperature,pH value,salt ion and SDBS on the gelation time of PAM/PEI gel system are investigated by means of rheological tests.The results indicate that the gelation time first increases and then decreases with the increase of polymer concentration; while with the increase of crosslinker concentration,the gelation time decreases gradually but the decrease rate shrinks gradually; higher temperature leads to shorter gelation time; the gelation time in neutral condition is longer than in alkaline condition,and no gel is observed in acid condition; both sodium and calcium ions can retard the gelation time of the gel system and the higher the mass fraction of salt ions,the longer the gelation time; SDBS can greatly retard the gelation time,when the mass fraction of SDBS is 0. 2%,the gelation time can be elongated to about 50 hours.

关 键 词：聚乙烯亚胺 成胶时间 缓凝 屏蔽效应 

分 类 号：TE358.3[石油与天然气工程—油气田开发工程]