Pattern Restructuring To Improve Water Flooding Development Effect Method Research

Because blocks long interval of commingled production note,the interlayer contradictions increasingly prominent,use less,hierarchical system development is slow the effective means of interlayer contradictions.Independently developed by the main layer formation feasibility evaluation,found that the degree of block using single sand body of poor composite water cut is low.But not the most reservoirs in single sand body,overlapping area is small,the overall low reserves abundance,and not in an interval,implementation is difficult.Local drill infill well conditions,but the overall development is difficult and high cost.Therefore,the main layer does not have independent divided into a series of conditions,should be based on the main rely on formation development pattern.In the integration of the existing various development adjustment technology,on the basis of exploring the feasibility of formation restructuring to further improve oil recovery,the technical policy limit,adjustment method and related technology,and comprehensive consideration with the original pattern,injection-production system adjustment,the second class reservoir combination of tertiary oil recovery and other subsequent adjustment,optimizing the series of strata combination and well pattern deployment of block,form for determining strata and well pattern evolution technology strategy adjustment,as the research for determining adjustment countermeasures to enhance the water drive recovery factor to provide technical support and guarantee.According to the experimental zone of the present status of the pattern and contradictions,to determine the formation of restructuring,refining the development series of strata total principle is: to build a new underground recognition system as the foundation,in order to improve the single sand body injection-production system as the core,the use of the existing well pattern,combined with encryption slow drilling,three times vertically subdividing development series of strata,reduce interlayer interference;Plane optimization of injection-production well pattern and injection-production well spacing,unit on perfecting injection-production relationship,establish effective driving system,improve the residual oil use,effective mining of various kinds of remaining oil,to improve the block development effect as a whole.