Analysis Of Sedimentary Model And Sandbody Matching Model Between Wells Of Saertu Reservoir Groups In The West Of Xingshugang?~? Areas Of Daqing Oilfield

The non main reservoir of Xingshugang area of Daqing oilfield has entered the late stage of development,in order to cope with the three oil production planning of the non main oil reservoir in the west of the Xingshugang 1-3,it is necessary to carry out fine dissection and study of non main oil reservoir.But the study on sedimentary facies model of delta front sandbody in the study area,and the interwell connectivity model between underwater distributary channel sandbody in delta front subfacies and sandbody of river edge is not enough.In this paper well logging data,coring data etc.are used.On the basis of dense well pattern,the reservoirs under different environments and types are finely dissected;the spatial distribution law of underground sandbody is clarified.By means of dividing and contrasting sedimentary time units,the isochronous stratigraphic framework of 49 sedimentary units of2567 wells is established.We find out there is one sedimentary facies,one sedimentary subfacies,six sedimentary microfacies,and then establish logging facies model according to the types and characteristics of different sedimentary microfacies,and 49 sedimentary microfacies were plotted.On the basis of previous work we carry on identification of plane sedimentary microfacies work well by well and Layer by layer.After defining the sedimentary microfacies' distribution law in each sedimentary unit,carry out the study on the evolution of sedimentary environment and sedimentary model of reservoir sandbody.Clear the evolution law of sedimentary environment of S?–S?is Lake flood surface expansion in the whole,the sedimentary environment transition from the delta front subfacies to pre delta subfacies.2 distribution patterns of underwater channel;3 kinds of distribution patterns of sand underwater.4 sedimentary models of reservoir sand body in study area.There are 3 kinds of vertical stacking patterns of inter well sand bodies;8 kinds planar connected patterns.Based on the above,the paper focuses on the 6 key sedimentary units in the non main layer,using effective sandstone thickness,channel sand body drilling rate date.On the basis of the analysis of the distribution law of the different matching modes between the sand body and the well pattern,the distribution rules of the different matching patterns of the sand body and the well pattern are analyzed,and the advantages of the next injection production well pattern adjustment are given.It provides the geological basis for the further development of the nonmain reservoir in the study area.