摘要
认识Al^(3+)络合离子与部分水解聚丙烯酰胺(HPAM)的交联反应机理,是高效利用HPAM/Al^(3+)调驱体系的基础。针对不同络合形态的Al^(3+)与HPAM组成的调驱体系,利用NMR,UV-Vis等方法研究了矿化度对柠檬酸铝的形态、Al^(3+)络合离子与HPAM交联反应的影响。实验结果表明,Al^(3+)与柠檬酸根的配比不同,弛豫时间随矿化度变化的幅度不同。对于用NaCl配制的模拟地层水,柠檬酸铝Ⅰ、Ⅱ、Ⅲ适用的矿化度区间分别为0~20000,5000~35000,18000~50000mg/L。在该适用区间内,调驱体系的交联反应不受矿化度的影响。对于给定的油藏,通过调整柠檬酸铝的组成即可控制交联反应时间,从而控制调驱体系的现场施工时间,提高利用效果。
Understanding the cross-linking reaction mechanism of Al^(3+)complex ion and partially hydrolyzed polyacrylamide(HPAM)is the basis for efficient application of HPAM/Al^(3+)profile control system in oilfields.For the profile control system of HPAM/Al^(3+)with different complex forms of Al^(3+),the influence of salinity on the form of aluminium citrate and the cross-linking reaction of Al^(3+)complex ions with HPAM were studied by NMR and UV-Vis.The results show that when the ratio of Al^(3+)to citrate changed,the relaxation time varied with salinity.For the simulated formation water prepared with NaCl,the applicable salinity for aluminium citrateⅠ,Ⅱ,andⅢwere 0-20000,5000-35000,18000-50000 mg/L,respectively.At applicable salinity,the cross-linking reaction of the profile control system of HPAM/Al^(3+)was not affected by the salinity.For a given oil reservoir,the cross-linking reaction time was tunable by adjusting the composition of aluminium citrate,thereby controlling the on-site construction time of the profile control system and improving the application effect.
作者
王成俊
展转盈
倪军
张磊
高怡文
王维波
Wang Chengjun;Zhan Zhuanying;Ni Jun;Zhang Lei;Gao Yiwen;Wang Weibo(School of Chemistry and Chemical Engineering,Xi’an Shiyou University,Xi’an Shaanxi 710065,China;Research Institute,Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Xi’an Shaanxi 710065,China;Key Laboratory of Theory and Technology of Petroleum Exploration and Development in Hubei Province,Department of Petroleum Engineering,China University of Geosciences(Wuhan),Wuhan Hubei 430074,China)
出处
《石油化工》
CAS
CSCD
北大核心
2021年第10期1058-1063,共6页
Petrochemical Technology
基金
国家重点研发计划项目(2018YFB0605500)
陕西省重点研发计划一般项目-工业领域(2021GY-141)。
关键词
调驱
部分水解聚丙烯酰胺/Al^(3+)体系
交联反应
矿化度
络合状态
conformance control and oil displacement
partially hydrolyzed polyacrylamide/Al^(3+)system
cross-linking reaction
salinity
complexing state
