The Comprehensive Research Of The Sedimentation And Reservoir Of The First Member Of Taizhou Formation In The South Of The Haian Area

The geology,logging,testing,seismic data are comprehensively utilized to subdivide and compare the layer and reservoir in the south of the Haian area.The fine research of reservoir were well done,which were the facies of single well,cross section diagram,plane diagram,and the processing and interpretation of logging data,the quantitative identification of barrier or intercalated bed,the identification of configuration features.After the research,the main results and understanding were followings:1)We do the research of the characteristics of the first Member of Taizhou Formation in the south of the Haian area at first,which deposited a braided river delta-delta sedimentary system,and combine the static research with the actual production performance.On the basis of sedimentary cycles and distribution characteristics of mud barrier bed,the stacked sand comparison model,uniform thickness comparison model and sedimentary facies change model were utilized to establish sublayer and sand group division framework and the heavy sublayer division scheme.The marker bed,auxiliary marker bed and the sedimentary facies change model were utilized to divide sand group,the equal height comparison method and thickness slice method were combined to divide sublayer,and we do the well work of the fine layer division and correlation.2)The well core and logging data were full used for the analysis of sedimentary microfacies,the microfacies were divided,and the characteristic of the microfacies were revealed.The braided river delta front-delta front sedimentary model was established of the first Member of Taizhou Formation in the research area.The core analysis data,well logging data were used to comprehensive evaluate the heterogeneity of the reservoir in the area by the research of reservoir diagenesis and the barrier or intercalated bed.3)On the basis of the research of the sedimentary facies and microfacies,a heavy layer division pattern was built in the work area of the major reservoir.After the research of the identification of lithofacies,we first do the analysis of the origin of the configuration interface,and the identification pattern of configuration features of the heavy layer in braided river delta was established.And the spatial stochastic reservoir properties model was established under the restraint of the spatial distribution of configuration features,the forecast of inter well configuration features was achieved.4)On the basis of the spatial stochastic configuration features model,we do the research of the restricted influence of the reservoir property,and the effectiveness of the spatially combined feature of the configuration features to the remaining oil distribution and deliverability was revealed.