交联聚合物溶液的热氧降解研究  

STUDY ON THE THERMO-OXYGEN DEGRADATION OF LINKED POLYMER SOLUTION

作　　者：董朝霞[1] 林梅钦[1] 辛见[1] 李明远[1] 彭勃[1] 

机构地区：[1]中国石油大学提高采收率研究中心,北京102249

出　　处：《大庆石油地质与开发》2010年第2期115-118,共4页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家科技重大专项“油田开采后期提高采收率新技术”（2008ZX05009-004）资助.

摘　　要：交联聚合物溶液（LPS）是一种对多孔介质具有特殊封堵性能的深部调剖剂，在油藏高温条件下，其稳定性对调剖效果具有重要影响。用黏度法、核孔膜过滤和动态光散射（DLS）法，对交联聚合物溶液的热氧降解稳定性和部分水解聚丙烯酰胺（HPAM）热氧降解后与柠檬酸铝（AlCit）反应所形成的体系的封堵性能及降解机理进行了研究。结果表明，HPAM与交联剂AlCit反应形成的LPS的热稳定性较差，热氧降解作用会使LPS的封堵性变差，封堵能力减弱。HPAM稀溶液在90℃下降解不同时间后与AlCit反应，所形成的LPS封堵能力随降解时间的增加而减弱，最终不能对1．2μm核孔膜形成有效封堵。LPS和HPAM热氧降解后形成的LPS的封堵性能下降的原因是热氧降解使得LPS中交联聚合物线团（LPC）尺寸和HPAM中高分子线团的尺寸变小。Linked polymer solution （LPS） is a kind of in-depth profile controlling agent with a special plugging ability to porous medium. On the condition of high temperature in an oil reservoir, the thermal stability of LPS possesses serious influence on LPS plugging efficiency. LPS thermo-oxygen stability is studied by viscometer, nuclear pore membrane and dynamic light scattering （ DLS）. Moreover the plugging efficiency and degradation mechanism of the produced system formed by degraded HPAM acting with aluminum citrate （AlCit） are also researched in such a way. The results show that LPS thermal stability produced by the action of HPAM with linking agent AlCit is rather poorer; the action of thermo-oxygen degradation can make LPS plugging efficiency decreased. HPAM dilute solution degrades at 90℃ for different times and then acts with AlCit, the formed LPS plugging ability decreases with the increase of degraded time, finally results in effective plugging lost for 1.2 μm nuclear pore membrane. The reason for the plugging efficiency drop is that the sizes of both linked polymer coils （LPCs） and the macromolecule coils of HPAM are declined after the thermo-oxygen degradation.

关 键 词：部分水解聚丙烯酰胺 柠檬酸铝 交联聚合物溶液 交联聚合物线团 降解 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]