矿化度对柠檬酸铝与部分水解聚丙烯酰胺交联反应的影响  

Influence of salinity on the cross-linking reaction mechanism of aluminium citrate and partially hydrolyzed polyacrylamide

作　　者：王成俊 展转盈 倪军 张磊[3] 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)

机构地区：[1]西安石油大学化学化工学院,陕西西安710065 [2]陕西延长石油(集团)有限责任公司研究院,陕西西安710065 [3]中国地质大学(武汉)石油工程系油气勘探开发理论与技术湖北省重点实验室,湖北武汉430074

出　　处：《石油化工》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)。

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.

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 

分 类 号：TQ316.64[化学工程—高聚物工业]