石油勘探与开发2017，Vol.44Issue(6)：860-870,11.DOI:10.11698/PED.2017.06.03
大型坳陷湖盆异重流成因的水道—湖底扇系统——以松辽盆地白垩系嫩江组一段为例
Sublacustrine hyperpycnal channel-fan system in a large depression basin: A case study of Nen 1 Member, Cretaceous Nenjiang Formation in the Songliao Basin, NE China
摘要
Abstract
Based on the integrated analysis of the seismic sedimentology,drilling and core data from the Nen 1 Member of the Cretaceous Nenjiang Formation in the Qijia-Gulong area,a large channel fan system of hyperpycnal flow origin was found in the Songliao Basin,and the hyperpycnal flows and hyperpycnites distributed in the deep water area of large depression lake basin were examined to find out the depositional model of channel-fan of hyperpycnal flow origin in the continental lake basin.The study shows that the hyperpycnal flow in this area originated from the edge of the basin,passed the northern delta,and then gave rise to a complete channel-fan system in the deep water area.The channel-fan system consists of straight channel and meandering channel from north to south with a straight extension of over 80 km and width of 100-900 m,and distal fan lobes at the channel tip with the maximum area of 20 km2.Dominated by fine-grained deposits,the system contains massive sandstone and sedimentary structures of flow water origin,internal erosion surfaces,and rich continental organic clasts,and shows bed-load and suspended-load transportation mechanisms.The hyperpycnite sequence has a coarsening-upward lower sequence and fining-upward upper sequence appearing in pairs,reflecting the dynamic feature of flood strengthening and then weakening cycle.关键词
松辽盆地/白垩系/嫩江组一段/浊流/浊积岩/异重流/异重岩/沉积特征/水道-湖底扇系统Key words
Songliao Basin/Cretaceous/Nenjiang Formation/turbidity current/turbidite/hyperpycnal flow/hyperpycnites/sedimentary characteristics/sublacustrine channel-fan分类
能源科技引用本文复制引用
潘树新,刘化清,ZAVALA Carlos,刘彩燕,梁苏娟,张庆石,白忠峰..大型坳陷湖盆异重流成因的水道—湖底扇系统——以松辽盆地白垩系嫩江组一段为例[J].石油勘探与开发,2017,44(6):860-870,11.基金项目
“十三五”国家油气重大专项(2016ZX05001) （2016ZX05001）
