部分水解聚丙烯酰胺溶液在孔喉模型中机械降解的主控因素  

Main controlling factors of mechanical degradation of HPAM in pore-throat model

作　　者：赵胜绪 岳湘安 张立娟[1,2] 韦杰迈[1,2] 凌卿[1,2] 刘凯 ZHAO Shengxu;YUE Xiang’an;ZHANG Lijuan;WEI Jiemai;LING Qing;LIU Kai(State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum(Beijing),Beijing City,102249,China;Key Laboratory of Petroleum Engineering,Ministry of Education,China University of Petroleum(Beijing),Beijing City,102249,China)

机构地区：[1]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [2]中国石油大学(北京)石油工程教育部重点实验室,北京102249

出　　处：《油气地质与采收率》2018年第6期84-88,共5页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"低渗-致密油藏高效提高采收率新技术"(2017ZX05009-004);国家自然科学基金项目"致密油储层提高采收率关键理论与方法研究"(51334007)

摘　　要：为明确驱油用部分水解聚丙烯酰胺溶液在孔喉模型中机械降解的主控因素,开展部分水解聚丙烯酰胺溶液在孔喉模型中的机械降解实验,分析其流速、质量浓度及储层孔喉比和地层水总矿化度等因素对其机械降解的影响。实验结果表明:部分水解聚丙烯酰胺溶液在孔喉模型中机械降解的主控因素为流速和孔喉比,其质量浓度和地层水总矿化度对部分水解聚丙烯酰胺在孔喉模型中机械降解的影响不明显;部分水解聚丙烯酰胺溶液在孔喉模型中机械降解导致的粘度损失率随流速增加而增加,且存在临界流速和极限流速2个机械降解流速特征值;部分水解聚丙烯酰胺溶液通过串联孔喉模型时,机械降解主要发生在前4个孔喉模型,说明部分水解聚丙烯酰胺溶液在油藏中发生机械降解的关键部位是近井地带。In order to know the main controlling factors of mechanical degradation of partially hydrolyzed polyacrylamide(HPAM)in pore-throat model,the mechanical degradation experiments of partially hydrolyzed polyacrylamide(HPAM)for polymer flooding in the pore-throat model were carried out,and the effect of flow rate,concentration,pore-throat ratio and other factors on the mechanical degradation was studied.The experimental results show that the main factors of mechanical degradation of HPAM in the pore-throat model are flow rate and pore-throat ratio,and the concentration and total salinity of formation water have little influence on the mechanical degradation of HPAM.The apparent viscosity loss caused by the mechanical degradation of HPAM in the pore throat increases with the flow rate,and there is a“critical flow rate”that the polymer molecules begin to degrade rapidly,and a“limit flow rate”at which the degradation reaches the limit.When the HPAM passes through the tandem pore-throat model,the mechanical degradation occurs mainly in the first four porethroat models,which indicates that the key position of the mechanical degradation of HPAM in the reservoirs is the near bolehole zone.

关 键 词：部分水解聚丙烯酰胺 聚合物驱 机械降解 孔喉模型 粘度 

分 类 号：TE357.461[石油与天然气工程—油气田开发工程]