Due to serious sensitivity to water and plugging by emulsification liquid, it was difficult to convert oil well to water injection well since water flood recovery in Zhangdian Oilfield.
张店油田进入注水开发以来，由于储层存在着严重的水敏、乳化液堵等伤害，致使油井转注较为困难。
Therefore, there is an urgent need of the survey on offshore injection well plugging, less injection mechanism and Broken Down injection technology.
因此，迫切需要对海上注聚井的欠注、堵塞机理以及解堵增注技术进行研究。
Plugging large pore in water injection well is the most important measures, and choice of plugging agent is getting more important.
封堵注水井的大孔道是控水稳油的重要措施，封堵剂的选择也越来越重要。
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