Sedimentary System Characteristics of Deng-3 Section on Paleo-central Uplift Belt in Northern Songliao Basin

On the regional sedimentary background, the sedimentary facies was studied by well-to-seismic integration, in view of the complicated situation of the researched region. Based on the analyses of lithologic association, sedimentary structure, paleontology, rock color and its contact relations, well logging curve shape, etc., sedimentary microfacies was analyzed by sand group around the whole area in detail. After sedimentary microfacies of single well and sand body connectivity of multi-well and seismic facies were analyzed, the sedimentary system was studied, in combination with regional sedimentary background, the palaeo geomorphology and thickness and lithology. The results show that, in Deng-3 section, its reservoir is mainly fluvial facies deposition, river channel sandstone is well developed, with large sandstone thickness and high sandstone percent, river channel microfacies has obvious advantages.