二氧化氯复合酸化解堵技术在商河油田的应用

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。

Application of Combined Acidizing Blocking Removing Technique of Chlorine Dioxide (ClO2) in Shanghe Oilfield

In combination with the problems of low efficiency, short valid periods of conventional acid stimulation in Shanghe Oilfield, the quality of injected water and organism blocking under formation conditions of recent years are emphatically analyzed in Shanghe Oilfield. In order to remove the blocking , ClO 2 blocking remover is introduced , the degradation of profile control and oil displacement gel system of the remover, its disinfection effect of SRB bacterial and its reaction with FeS are evaluated with laboratory experiments, optimal concentration, temperature and response time are chosen. On the basis of proper selection of wells, formation blocking is removed completely with good result by using ClO 2 blocking remover and mud acid combination in the field.