Detailed Description Of Reservoir In Lower Four Member Of Shahejie Formation In Pingfangwang Oilfield

The four subsections of the Pingfangwang oilfield are mainly distributed in the east of the Pingfangwang oilfield,including 3 blocks.This study mainly focuses on the work of 169 blocks and 193 blocks.In this paper,comprehensive utilization of seismic,drilling,logging,well logging,well testing,core,production performance data,under the precondition of unconformity surface determine the up and down,between two phase of unconformity surface formation is divided into five periods.From the causes of sand body and sedimentary microfacies analysis,on the basis of logging lithologic data and curve characteristics and real case study on sedimentary system characteristics,king square oilfield around 5 sedimentary bodies are in coastal and shallow lake facies.Reservoir study is based on coring well data,combining with the logging lithology and log curve data,on the basis of fine small layer contrast,distribution characteristics of reservoir,reservoir development characteristics and heterogeneity study.The reservoir distribution is stable and the sand body is thicker,which is the thickest in the Midwest.The thickness of the 193 block reservoir is thinner than that of the 2m reservoir.The oil layer is mainly developed in 2 sand groups,with the largest oil area and reserves.The 193 block of oil in the shore is mainly developed in the 2 sand group,with the largest oil area and reserves.Weak intraformational heterogeneity,interlayer heterogeneity is stronger,the plane distribution of interlayer difference is bigger,marina 169 pieces of large interlayer thickness are mainly distributed in 169 wellblock marina,marina 193 wellblock is also the most thick interlayer zone.