The Research On Sedimentary Facies And Geological Factors Of Injection Pressure On X1~3 Block In Daqing Oilfield

With the development of Daqing Oilfield advanced stage, oil production of Xingshugang oilfield 1~3 block step into the third stage, Basically the production method of polymer flooding and ASP flooding method gradually replaced the traditional method of water flooding,effect of injection pressure to abnormal oil production at this stage produced far more water flooding stage. With three infill wells in Daqing Oilfield lying is completed, in a denser network of well conditions, the re-establishment of high resolution sequence stratigraphic framework of the study area is divided by time units compared with the technology. On this basis, the author of the study area of the injection pressure is abnormal for analysis.With sedimentary facies research as the main direction of research, and the establishment of a pressure control mode. The theory is further refined as Well plane communication mode and Well dimensional communication mode. In this theoretical model, began to develop geological factors and dynamics analysis are discussed in detail, And identified in the absence of fault seal and the problem of excessive local injection, The main factors are abnormal injection pressure deposition of the PⅠ32+ PⅠ332 two units with control action, namely the lower part of PⅠ1~3 river development wells and connectivity sandstone. For the subsequent development of polymer flooding injection blocks provide geological basis.