交联聚合物微球分散体系的流变性  

Rheological behavior of linked polymer micro-ball dispersed system

作　　者：李雅华[1] 李明远[1] 林梅钦[1] 董朝霞[1] 

机构地区：[1]中国石油大学(北京)提高采收率研究中心,北京102249

出　　处：《油气地质与采收率》2008年第3期93-95,共3页Petroleum Geology and Recovery Efficiency

基　　金：中国石油大学(北京)重质油国家重点实验室开放基金(200409)

摘　　要：用HAAKE RS600型流变仪研究了交联聚合物微球分散体系的流变性及其时间效应。结果表明,质量浓度为100mg/L的交联聚合物微球在40℃下恒温溶胀10d时,其流变性与相同条件下低浓度部分水解聚丙烯酰胺溶液的流变性不同。交联聚合物微球分散体系在中等剪切速率(335～1380s-1)时表现为胀流性,在低剪切速率(60～335s-1)时表现为假塑性,在高剪切速率(1380～1600s-1)时表现为近似牛顿性。而相应的部分水解聚丙烯酰胺溶液只表现为轻微的假塑性。交联聚合物微球分散体系具有时间效应,表现为负触变性(震凝性),而部分水解聚丙烯酰胺溶液的流变性没有时间效应。The rheological behavior and time effect of linked polymer micro-ball dispersed system were measured by using HAAKE rheome-ter. The results show that the rheological behavior of the linked polymer micro-ball dispersed system with the mass concentration of 100mg/L and swelling for 10 days at 40℃ is different from the HPAM solution with the same concentration. The linked poly-mer micro-ball dispersed system represents dilatant behavior at a mid shear rate (from 335s-1 to 1 380s-1) ,while pseudoplasticity at a low shear rate (from 60s-1 to 335s-1 ) and approximate New-tonian behavior at a high shear rate (from 1 380s-1 to 1 600s-1). For the HPAM solution,slight pseudoplasticity is found at the ex-perimental range. The linked polymer micro-ball dispersed sys-tem has time effect,which represents negative thixotropy,while the HPAM solution has no time effect.

关 键 词：交联聚合物微球 粘度 流变性 负触变性 

分 类 号：TE357.431[石油与天然气工程—油气田开发工程]