Reservoir Geology In Superhigh Water-cut Stage In Lower-sandbody Of Tuo-7 Block Of Shengtuo Oilfield

Oil reservoir of Tuo-7 Block of Sheng tuo Oilfield has entered later stage of Superhigh Water-cut production after nearly fifty years.The residual oil distribution is complicated and fluid producing formation is unreasonable by the impact of strong reservoir heterogeneity,well pattern type and imbalance between injection and production.The conventional mode of development have been unable to solve the existing problems,especially in later stage of Super-high Water-cut production.In view of the above problems,it is necessary to carry out the research of fine reservoir geology in this paper,by using geological,logging,seismic,dynamic development data,to make elaborate stratigraphic classification and comparison about Es2 section,to carry out the study of sedimentary microfacies,and use the well logging data to carry out the secondary interpretation.In this paper,it present the new reservoir facies division and reservoir heterogeneity model,find out that the reservoir heterogeneity has obvious control effect on the distribution of remaining oil,and put forward the remaining oil distribution model.Aiming at the distribution of remaining oil controlled by the facies and reservoir heterogeneity,it propose the vector well pattern development adjustment project.Through the implementation on the field,it has made great development effect,such as expand the producing degree of reserves,dig the the remaining oil,improve the recovery rate.It is believed that this paper afford to provide guidance significance to other similar Superhigh Water reservoir development through the study of this paper.