高温稳定剪切条件下聚乙烯亚胺冻胶成胶性能研究  

Gelation of Polyethyleneimine Gelling Fluid under High Temperature and Steady Shear Conditions

作　　者：赵梦云[1] 张锁兵[1] 丁树柏[2] 欧阳坚[1] 赵青 

机构地区：[1]中国石油勘探开发研究院油田化学研究所,北京100083 [2]中国石油勘探开发研究院专家室,北京100083 [3]中国石油集团安全环保技术研究院,北京100083

出　　处：《油田化学》2010年第1期69-72,15,共5页Oilfield Chemistry

摘　　要：考察了由不同相对分子质量M(6.47×106～1.06×107)和水解度(2%～25%)的5种PAM与聚乙烯亚胺PEI-C1(M为3000～3500)的蒸馏水溶液在100℃、静态条件下的成冻性能,选择1.25%HF70008(M=8.18×106、水解度2.5%的PAM)/0.625%PEI-C1为实验成冻体系。该体系在120℃、51/s下连续剪切时的表观黏度曲线包括诱导、成冻和稳定三个阶段;在110℃下,剪切速率由11/s增至201/s时,初凝时间由2162s缩短至840s;由90℃、100℃、120℃和51/s下的初凝时间按Arrhenius公式求得,该体系的表观反应活化能为61.94kJ/mol,与文献值一致。通过改变该体系中PEI-C1的用量求得HF70008与PEI-C1的临界质量比为2∶1,高于此比例的体系形成的冻胶不稳定。温度、剪切速率、PAM和PEI用量对成冻时间的影响与一般聚合物冻胶相同。The static gelation at 100℃ was studied for lots of polyethyleneimine（PEI）/polyacrylamide（PAM） solutions in distilled water,in which a PEI polymer of M=3000—3500,notated as PEI-C1,was taken and PAM polymers had M in range 6.47×10^6—1.06×10^7 and HD in range 2%—25%,and in result 1.25% HF70008/0.625% PEI-C1 solution was chosen for dynamic gelation study where HF70008 was a PAM of M=8.18×10^6 and HD=2.5%. For this experimental gelling solution（GS）,the curves of apparent viscosity vs shearing time at 120℃ and 5 1/s went through stages of induction; gelation,and stabilization; the initial gelation time（IGT） was lowered from 2162 s to 840 s when the shear rate rose from 1 1/s to 20 1/s; an apparent activation energy of 61.94 kJ/mol was determined by using Arrhenius equation from IGT data at 90℃,100℃,and 120℃ and at 5 1/s shear rate. For the GS of varying PEI-C1 concentration,a critical limit of HF70008 to PEI-C1 mass ratio of 2：1 was found and beyond this limit the gel formed was not stable. The effects of temperature,shear rate,and concentrations of PAM and PEI upon the gelation time of PEI-C1/HF70008 solution were similar to that for standard polymer gelling systems.

关 键 词：聚乙烯亚胺冻胶 聚合物冻胶 聚丙烯酰胺 成冻(成胶)性能 组成与配方 高温 稳态剪切 堵水调剖剂 

分 类 号：TE39[石油与天然气工程—油气田开发工程] TE357.46