Reservoir Description Of Yu4 Block Shahejie Formation In Yulou Oilfield,Liaohe Depression

In recent years,the main block of liaohe oilfield has entered the stage of high water-bearing,high degree of recovery.In order to find production replacement,geological engineers deploy some wells in yu4 block which has low exploration and development degree.All the wells got good oil shows.However,in order to expand the scale of implementation,it is still necessary to solve the problems of inconsistent reservoir understanding of Es1 lower horizon and low degree of reservoir research of Es3 upper horizon.Therefore,it is necessary to use geological,seismic,logging,oil testing and production data to get lucubrates about the sedimentary system development,structure feature and reservoir feature,so as to provide assistance for the subsequent increasing reserve and production.This paper relies on existing data,using comparison method of cycle contrast and hierarchical control to distinction the two horizon into eight sand.At the same time,combined with 3d seismic and production dynamic data to proceed detail structural interpretation.Different layers of structural map plan have been compiled.The fault development and structural distribution were clarified.Based on previous studies,logging,core data,the types of sedimentary facies and sedimentary microfacies are studied,and the reservoir distribution is predicted by seismic inversion technology in view of the low degree of control in the southern well pattern of the block,which guides the division of sedimentary microfacies and reservoirs distribution.At the same time,in order to meet the needs of subsequent development,the reservoir rock type,pore structure,heterogeneity,diagenesis and other aspects were studied in detail.To solve the problems of disordered logging series and inconsistent logging standards in this area,the secondary interpretation of logging curves is redone,the low critical boundary of lithology,physical quality,electrical property and hydrocarbon-bearing property of the reservoir is determined.Finally,combined with the above research results,establish the reservoir evaluation standards,the distribution of favorable areas is understood,which lays a foundation for the analysis of remaining oil distribution and development adjustment in the future.