Research On The Channeling Sealing Of Alkali-surfactant-polymer Flooding Plugging Agent

Alkali-surfactant-polymer flooding is a kind of Tertiary Oil Recovery technique. Alkali-surfactant-polymer flooding can raise recovery above 20% compares with water flooding. The technique has already become an important method at late high water-cut stage in the oilfield.Along with continuously exploitation in the oilfield, the condition becomes more and more complication. The exploration-layer systems are interrupted by the channeling, especially the multilayer-section channeling wells. The channeling influences exploitation of effect. Original shielding technology are not adaptive to shielding the multilayer-section channeling wells. In order to improve the displacement efficiency of water driving in late-time development of the oilfield , control the increase rate of water cut and improve the effect of production by water injection, channeling plugging technique has been developed and application. The plugging agent and operating technology are suitable for alkali-surfactant-polymer flooding.It had been used in Daqing Oilfield and achieved good results,field experiment shows that it can effectively improve the injection water condition, enhancing oil recovery, the technology will be used wildly in other oilfield.