Study On The Architecture Model Of The Fan-delta In Kongdian 1th Formation Of Wangguantun Oilfield

At present,most of the main oil fields in China have entered the middle and late stage of production and development,therefore,tapping the potential of remaining oil has become an important content of oilfield.With the development of oilfield,the traditional study of reservoir heterogeneity can't longer meet the needs of remaining oil exploration,concurrently the reservoir architecture provides new research ideas for that,the remaining oil inside sand bodies has gradually become the main target of oilfield development.Therefore,it is necessary to carry out research on the flooding law under the control of different reservoir architecture grades.In this paper,the research object is the fan delta front sedimentary reservoir of Z?x oil formation of Guan195 fault block of Wangguantun oilfield.First of all,the core data,logging data and production data are used for comprehensive interpretation of single well waterflooding.Then,based on the development geological method and reservoir numerical simulation method,the water flooded characteristics of the study area are analyzed quantitatively.Then,based on the architecture characteristics of sand body and interior sand body,the water flooded distribution pattern are summarized,and the different factors of water flooded are clarified.Finally,the water flooded rule under the control of different levels of architecture is revealed comprehensively.The results show that with the development of the study area,the flooded area increases gradually,and the morphology of the flooded area changes from isolated point shape to block shape,strip shape with different sizes to the current downstream slice shape.Based on the comprehensive interpretation of water flooding and reservoir numerical simulation,it is found that the main type of water flooding in the study area is strong water flooding,followed by medium water flooding and weak water flooding,and the proportion without water flooding is the smallest.In addition,he distribution of remaining oil is highly scattered,and the remaining oil area is mainly distributed at fault boundary,physical property boundary and architecture boundary.The distribution of waterflooding difference of sand body is mainly controlled by superposition mode and physical properties.Six types of waterflooding distribution patterns of sand body are summarized,which are weak water flooding at the edge of single sand body due to mudstone shelter,weak water flooding at the lateral superposition of bar sand bodies,weak water flooding at the lateral superposition of distributary channel sand bodies,strong water flooding at the vertical shear superposition of distributary channel and bar sand body,weak flooding at the superposition of distributary channel and levee sand body,and weak water flooding at the superposition of main body and edge sand body of bar.The distribution of water flooding difference inside sand body is mainly controlled by seepage barrier and permeability rhythm.The internal seepage barrier of sand body is mainly reflected by its area,location and number.With the increase of the number of interlayer,the recovery degree of oil layer decreases gradually,and the bottom of interlayer is flooded by weak water.With the increase of interlayer area,the recovery degree of oil layer decreases,and the area of underwater and weak water flooding increases.With the distribution of interlayer from top to bottom,the recovery degree of oil layer decreases gradually.