低渗透油田高含水油井堵水压裂试验与优化

The test and optimization of water plugging and fracturing technology of high water-cut wells in low permeability oilfield

安塞油田属于典型低渗透油藏,油井大多采用压裂方式投产,随着注水开发时间的延长,使得人工裂缝和天然裂缝沟通能力进一步增强,导致油井含水率逐渐上升,甚至水淹。为此,安塞油田开展了高含水油井堵水压裂工艺试验与优化,通过屏蔽原有水流通道后再进行压裂改造,达到控水增油目的,充分挖掘高含水油井剩余油,提高油井采收率,为同类油藏高含水井治理提供了一定的借鉴与指导。

Ansai oilfield is a typical low-permeability reservoir, where most wells by fracturing mode of production.With the prolongation of water injection development,the artificial frac- ture and natural fracture communication capacity further enhanced,which cause water cut of well rising,even flooded.So,the water plugging and fracturing technology has been tested and optimized,to fully tap the remaining oil in high water cut wells,and increase its ultimate re- covery,by masking the original flow channel after fracturing, to provide reference and guid- ance for the similar reservoir in high water ~l^t rill w,~ll