Study On Rearrangement Optimization Of Late Layer Series Of Waterflooding In Xingnan Development Zone

After more than 40 years of water injection development in xingnan development zone,the contradiction between vertical and horizontal heterogeneity of reservoir is increasingly prominent,the general water injection development and original injection-production pattern cannot meet the production needs of this stage,seriously restricting the growth of oil recovery.In this paper,the fine numerical simulation of xingnan development zone is made by using digital analogy software eclipse,the remaining oil distribution characteristics of the block are obtained,five different types of remaining oil are summarized;The key technical research of reconstruction well pattern reorganization layer system includes the principle of classification of strata series,the demonstration of residual resource of independent development layer,the technology of strata classification and the theoretical study of the key technology of well pattern reconstruction.According to the actual mining parameters of xingnan development zone,the basic principle of series of series of strata in xingnan development zone is applied,the specific partition method of the reorganization of the layer series of strata is proposed,and the index prediction of fault block development pattern is deployed.It provides a reliable basis for improving waterflood recovery ratio of old oilfield with more longitudinal drainage layer in the late stage of water bearing.