The study of sedimentary microfacies and capacity as well as the relationships which has great guiding significance to the exploration and development of oil and gas in Yuke region.Therefore,comprehensive analysis of core,logging and seismic datas get a result that the material source come from the northwest and southwest of the Yuke region.At the basis of many sedimentary fscies symbols such as mudstone color,lithology,sedimentary structure,paleontology,electrofacies and seismic facies etc,of which eventally confirm a result that the sedimentary period of Ed3 in Yuke region develop the atypical meandering river sedimentary facies,divided into three subfacies which are riverbed,bank and river flood,further divided into five microfacies which are marginal bank,riverbed detainment sedimentation,splay,excessive bank sand and floodplain.The depositional environment is the key factor influencing the reservoir capacity because of which controls the reservoir structure.The reservoir production is relatively high where there has adequately material supply,stronger sedimentary hydrodynamic,stable water flow and developed sand body.%沉积微相与产能以及二者关系的研究对指导榆科地区油气勘探和开发具有重要的意义.为此,通过岩心、测井、地震等资料综合分析,认为榆科地区物源方向来自西北和西南;同时通过颜色、岩性、沉积构造、古生物、测井相和地震相等多种相标志共同确定榆科地区东三段沉积期发育非典型曲流河沉积相,发育河床、堤岸和河漫三个亚相,边滩、河床滞留沉积、决口扇、溢岸砂和泛滥平原五种微相类型.沉积环境控制发育的储层结构类型,是影响储层产能的关键因素.物质供应充分、沉积水动力较强、水流稳定、砂体发育的区域,产能相对较高.
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