油田注水开发过程中结垢与水敏的防治

江汉油区地层水矿化度高,根据室内试验显示,在油田注水开发过程中,注入水与地层水不配伍容易产生结垢;另一方面矿化度太低的注入水对部分区域来说因水敏性而引起粘土膨胀。因此,在注水开发过程中,需要加强动态观察和生产管理,在注水过程中加入适当的阻垢剂减少结垢,对于水敏伤害,则可以加入合适的防膨剂改善注水开发效果,提高原油最终采收率。

Precautions against Scaling and Water Sensitivity in Oilfield Water Injection Development

The formation water in Jianghan Oil Region has high salinity. Laboratory experiments show that scale is easily formed because injected water is not compatible with formation water in water injection. On the other hand, injected water with very low salinity results in clay swelling for water sensitivity in several areas. So this paper suggests enhancing dynamic observation and management and adding proper anti--scaling agent to decrease scaling in water injection. As for water sensitivity, it suggests adding proper antiswelling agent to improve development effects, thus increasing the final crude recovery efficiency.