Study On Identification And Management Of Dominant Channels In Pubei X Fault Block

The Pubei Oilfield X fault block is located in the Putaohua field in the southern part of Daqing.With the increase of water injection time,oil and water movement laws are becoming more and more complicated,constantly exposed many problems and contradictions.The continuous scouring of the injected water leads to the change of the pore structure inside the reservoir,which aggravates the heterogeneity of the reservoir.The injected water mainly flows along the direction of easy seepage to form the dominant channel of the seepage,which ultimately leads to complicated distribution of residual oil and difficult analysis.Oilfield water flooding development is poor.Therefore,through the characteristics of reservoir geology and development in the fine anatomical study area,the dynamic and static data of each development stage are comprehensively applied,and the precise identification and treatment scheme of the dominant channel is studied in the whole area to achieve the purpose of improving oil recovery.Through the establishment of 3D geological model and numerical model,the paper completed the detailed description of the reservoir and the re-recognition of the geological features of the oilfield as the basis for subsequent research.The development effect evaluation of the whole district was carried out,and the contradiction of block development was analyzed.Through a set of dynamic and static data,tracking numerical simulation,streamline numerical simulation,etc.,a complete set of seepage dominant channel identification methods is proposed and verified and classified.According to the dominant channel control mechanism,the remaining oil in the whole area is divided into five types,and the grey relational algorithm is used to superimpose and quantitatively evaluate the remaining oil types,and the remaining oil distribution law is summarized.Analyze the performance characteristics of various types of seepage flow dominant channels and analyze the adaptability of treatment measures.Finally,the different types of dominant channels are classified and governed,a reasonable set of treatment plans is determined,and the comprehensive development effects are predicted,providing technical support for improving oil recovery.