The Research Of Adjustment In Subdivision Of Series Of Development For The S₂ Reservoir Of 29 Section Of Lijin Oilfield

Lijin Oilfield belongs to Shengli Oilfields,and its dynamic injection-production pattern are not perfect,formation energy can not be added,liquid production declines;exacerbated contradiction in injection-production units,decreased degree of well pattern control and the degree of water flooding control,which lead to waterflooding grim.S2 reservoir is the main oil-bearing formation of 29 section in Lijin Oilfield,oil-bearing area 1.9km2,proven oil reserves of 351.34×104t,the current degree of well pattern control is 68.6%,the degree of waterflooding control 54.8%,edge network controlled reserves 116.7×104t,which is urgently need of further "secondary development".Therefore,through the analysis of current developing effectiveness of Li 29,evaluating its situation of reserves producing effectiveness,adaptability of series of strata,adaptability of well pattern,water flooding effect and energy situation,to find out existing problems and potential for further development;simultanously,remaining on the basis of researching concentration zone,we can implement pointed adiustment and design project,moreover,and predict the indication of development and recovery preferred to the optimal solution.After the implementation of the program,single well controlled reserves can be upgraded to 14.7×104t,recovery 37.8% in fifteen years,watercut of blocks 96.7%,inhancing recovery 9.1%,increasing recoverable reserves 33.0×104t,which is quite effectively.