西安石油大学学报（自然科学版）2012，Vol.27Issue(6)：1-7,7.
鄂尔多斯盆地吴起地区侏罗纪早中期河流沉积及油气分布
Study on fluvial deposits and oil & gas distribution of early and middle Jurassic in Wuqi area,Ordos Basin
摘要
Abstract
On the basis of core observation,well drilling datalogging data and so on,the characteristics and evolution of the sedimentary system from Fuxian Formation to Yan10, Yan 9, Yan 8 reservoirs of Yan an Formation of early and middle Jurassic in Wuqi are-a, Ordos Basin are studied in detail using modem sedimentology theory. It is held that Fuxian Formation of early Jurassic and YanlO reservoir of middle Jurassic are dominated by deep valley filling braided fluvial deposits, and Yan 9 and Yan 8 reservoirs are dominated by meandering fluvial deposits. The two types of fluvial deposits experienced regular inherited evolution. The braided sand-body of Fuxian Formation is the thickest because of the strongest valley packing action. During YanlO period,the filling process continued,headward e-rosion was developed on the sub-valley slopes, the channel grew wider due to lateral erosion and the distribution range of flood plain reduced. During Yan 9 and Yan 8 periods, river became meandering river, and fluvial was present in Yan 9 and Yan 8 Reservoirs and channel and flood plain deposits were developed because of the reduction of the elevation difference of ancient landform. Braided river and meandering river depositional models were developed in early and middle Jurassic in Wuqi area. The hydrocarbon accumulation is controlled by the channel sandstones, which may be regarded as the target for further exploration of oil and gas.关键词
辫状河/曲流河/沉积相/河流演化/侏罗纪早中期/鄂尔多斯盆地/油气分布Key words
braided river/meandering river/sedimentary facies/fluvial evolution/Early and Middle Jurassic/Ordos Basin/oil & gas distribution分类
能源科技引用本文复制引用
孟立娜,李凤杰,方朝刚,李磊,林洪..鄂尔多斯盆地吴起地区侏罗纪早中期河流沉积及油气分布[J].西安石油大学学报（自然科学版）,2012,27(6):1-7,7.基金项目
国家自然科学基金(编号:41172100) （编号:41172100）
四川省教育厅自然科学重点项目(编号:09ZA007)联合资助 （编号:09ZA007）
