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针对商河油田常规酸化增注措施有效率下降、有效期缩短的问题 ,重点分析了近几年商河油田注入水水质及地层条件下的堵塞情况。为解除有机物堵塞 ,引进了二氧化氯解堵剂 ,通过室内实验评价了其对调驱用凝胶体系的降解作用、对硫酸盐还原菌的杀菌效果和与FeS的反应 ,优选了现场应用的最佳浓度、温度和反应时间。并在合理选井的基础上 ,利用二氧化氯解堵剂和土酸复配应用于现场 ,彻底解除地层堵塞 ,取得了很好的效果
In view of the problems of conventional acidification and re-injection measures in Shanghe Oilfield have been effectively reduced and the effective period shortened, the situation of plugging in the injection water quality and formation conditions of the Shanghe Oilfield in recent years has been analyzed emphatically. In order to relieve the blockage of organics, the chlorine dioxide blocker was introduced, and its degradation effect on gelling system, its bactericidal effect on sulfate-reducing bacteria and the reaction with FeS were evaluated through laboratory experiments. Good concentration, temperature and reaction time. On the basis of rational selection of wells, the application of chlorine dioxide de-blocking agent and tungstic acid compounding to the site completely eliminated the blockage of the formation and achieved good results