Remaining Oil Distribution Of Gao II1-18 Layer In L8-JP182 Area

Most of oil fields in our country has entered the high water content, high degree of recovery stage, especially Daqing oil fields which has developed more than 40 years Lamadian oilfield area currently has more than 90% average water distribution, so the study of remaining oil distribution has important significance for further development and adjustment of the oilfield.Based on the high-resolution sequence stratigraphy and reservoir sedimentology, the Gao II1-18 layer in Lamadian Oilfield east block L8-JP182 area of the system of high frequency isochronous stratigraphic correlation, the objective layer is divided into 1 long-term cycles, 2middle term base level cycle and 8 short term levelcycles. On the basis of sedimentary microfacies of the reservoir classification and identification, the delta front sand body morphology, phase distribution were studied, the establishment of a set of dense well logging curve identification of sedimentary microfacies, common subaqueous distributary channel,sand sheet, non main body seats like sand, mouth bar and subaqueous distributary channel between 5 microfacies.In the fine stratigraphic and sedimentary microfacies on the basis of the study, the heterogeneity of reservoir are systematically analyzed, summarized the reservoir plane heterogeneity, vertical heterogeneity, distribution and influencing factors of heterogeneity and inter layer, for the remaining oil distribution and the main controlling factors of the foundation.Based on the comprehensive application of core, logging, production dynamic data,based on sequence stratigraphy, sedimentary microfacies, reservoir heterogeneity and so on,from the macro distribution and summarized 7 types of remaining oil on the plane and vertical,analyzes the control action of sedimentary microfacies, micro structure and reservoir heterogeneity on residual oil, residual oil and plane of each layer and the factors affecting the distribution of longitudinal remaining oil.Based on the types of remaining oil and its main controlling factors in the analysis of, on L8-JP182 well area G II 1-18 layers of remaining oil distribution were system analysis, that plane of remaining oil enrichment is mainly controlled by sedimentary microfacies and reservoir heterogeneity of control, vertical can points for the top rich set, uniform drive type and bottom enrichment type for three enrichment regularity.