济阳坳陷埕东-飞雁滩油田新近系馆上段层序地层研究

综合利用地震、测井、岩心、古生物和地球化学等资料 ,对济阳坳陷埕东 -飞雁滩油田新近系馆上段进行了层序地层学研究 .在总结各层序界面及体系域界面的识别特征的基础上 ,将馆上段划分为 1个层序 ,3个体系域 ,1 0个准层序组 ,2 3个准层序 ,并以体系域为单元 ,分析了馆上段的沉积演化过程 ,认为低位域为河流相和三角洲相 ,湖侵域为滨浅湖相 ,高位域则为滨浅湖 -三角洲泛滥平原相 .探讨层序地层与油气分布的关系 ,指出湖侵域砂体展布广 ,储集性能好 ,储层和盖层匹配好 ,而且油藏圈闭面积大 ,油水界面统一 ,为最理想的勘探开发目标

Study on the sequence stratigraphy of the upper Guantao Formation of Neogene in Chengdong-Feiyantan Oilfield in Jiyang Depression

On the basis of the integrated analysis of seismic, well logging, core, paleontological and geochemical data, the Upper Guantao Formation of Neogene in Chengdong-Feiyantan Oilfield of Jiyang Depression is comprehensively studied in terms of sequence stratigraphy. First, the characters of different sequence boundaries and system tract boundaries are identified, the Upper Guantao Formation is confirmed as one sequence including three system tracts, which is divided into ten parasequence sets and subdivided into twenty-three parasequences. Then, its sedimentary evolution is discussed and it is held that lowstand systems tract is from stream to delta, transgressive systems tract is nearshore shallow lacustrine. Highstand systems tract is from nearshore shallow lacustrine to delta plain. The relationship between sequence stratigraphy and hydrocarbon reservoir distribution is highly analyzed, the conclusions are drawn that transgressive systems tract is the most prospective object of exploration and development, because it has the broad distribution of sandbody, the good capacity of storage, the perfect matching of reservoir and seals, the big closure area and the uniform oil-water contact of hydrocarbon reservoir.the sequence s