摘要
本文介绍了在大庆油田将高温低点蚀土酸酸化缓蚀剂８４０１Ｊ（１２０℃）用于中、低温（＜１００℃）地层注水井的除垢、解堵及基质酸化的情况，所用酸液除常规土酸外，还有胶束酸和磁化酸，缓蚀剂加量为０．５％—１．５％。
As a part of the flooding system selection for the ASP flood program in Karamay Oil Fields (field operations have started in Aug. 1995), the swelling of bentonite from Xiazijie, Xinjiang, in Na 2CO 3 and Na 2CO 3/NaOH (equal molar ratio) solutions containing 0.3436% NaCl over up to 96 hrs is investigated. It is shown that the expanding degree goes through a maximum with increasing alkali concentrations in both cases and the expansion is higher in Na 2CO 3 solutions than that in Na 2CO 3/NaOH solutions. The later findings is explained by the reduction in negative electric charge on clay grain surface caused by adsorbed Al 3+ ions from reaction solutions.
出处
《油田化学》
CAS
CSCD
北大核心
1996年第4期371-372,共2页
Oilfield Chemistry
关键词
缓蚀剂
土酸酸化液
酸化
注水井
油田
Alkaline Chemicals, Clay Swelling, Alkali/Clay Interactions, Sodium Carbonate, Sodium Carbonite/Sodium Hydroxide in Mixture
