| In fracture development of low permeability reservoir of jilin oilfield,due to the characteristics of reservoir heterogeneity and fracture development,leading to adjust the area water cut rising speed is accelerated and the development characterized is low recovery degree,high water cut,intraformational contradiction and ineffective water cycle.The fuyu oilfield is a typical representative,in fine separate-layer water injection,improved flood control,to find water plugging and profile control,etc,to do a lot of work,but invalid water cycle issue still not solved,so need to carry out the deep displacement test work,effectively relieve the contradictions of water flooding development,control invalid water cycle,to realize a qualitative across water flooding to improve oil recovery.Overall design is divided into wall,displacement displacement stage,and since the beginning of May 2010 injection plugging stage,completed by mid December 14 Wells of block stage of the injection,on March 1,2011 began to injection displacement stage.Because X block reservoir with edge channel complex and sensitive dynamic response,a system is not conducive to the late effect evaluation,so the two systems is mutual authentication,so that the oil displacement technique further popularization and application.In Block 7 Wells of the western with microspheres system is given priority to,7 Wells of the eastern using gel system.Achieved the following progress,and make some progresses:① Understand technology advantage channel to further perfect;② According to the idea of "hierarchical displacement",identifying and improving oil displacement system further optimization and improvement ③Displacement design further optimize and improve ④Displacement field matching technology to further improvethe ⑤Preliminary form displacement field monitoring and evaluation technology⑥Preliminary deep displacement effect evaluation index system is established.Through the development of deep oil displacement experiment,explore form suitable for the low permeability fractured sandstone reservoir,oil displacement matching technology,for"secondary development" fuyu oilfield stable for a long time to explore new ways to improve water drive recovery factor,for similar oilfield deepening development provide a new technical way. |
