孤东油田注聚区系统调剖技术

A series of profile control techniques of polymer flooding in Gudong oilfield

孤东油田进入中高含水期开发阶段,长期的注水冲刷使得地下油藏中高渗透带或大孔道的分布更加普遍,导致注聚过程中很容易发生高浓度聚合物“窜流”现象,不仅难以形成高质量的聚合物段塞,而且造成了经济上的浪费。根据几年来的注聚区经验,总结出在注聚前中后3个不同阶段分别针对具体油水井特征,使用不同堵剂进行一系列深度调剖工作,取得了较好的开发效果。

The development of Gudong oilfield has entered the medium- high water bearing stage. Because of the long term action of waterflooding and erosion, the high permeability zone and high capacity channel become more popular in the subsurface reservoir, which will easily lead to the fluid channeling of concentrated polymer during the process of waterflooding. If this really happens, it is not only difficult to form high quality polymer slug, but also causes economic waste. According to the experiences in the past years, a series of profile control in depth with different water shutoff agents has been concluded, which respectively aims at special characteristics of oil-water wells in different stages of waterflooding. The result show that it has good effect for development