【摘要】 通过地震沉积学中的地层切片方法,结合岩石岩屑组分分析和重矿物组分分析方法,对松辽盆地北部上白垩统嫩江组进行了物源及古流向分析。在古流向研究的基础上建立了嫩江组曲流河—三角洲—湖泊沉积体系的沉积相分布模式。模式表明,嫩江组沉积直接受控于东部及东北部三角洲,东北部物源在嫩江组一段沉积期占主导地位,其古流向沿近南北向坡降方向;经过嫩江组二三段沉积早期最大湖泛面之后,东北物源萎缩,东部物源逐渐占主导地位,其古流向沿东西向坡降方向。沉积相模式的提出为松辽盆地北部黑帝庙油层的油气勘探提供了有力的地质支持。更多还原

【Abstract】 The provenance and palaeocurrent direction of the Upper Cretaceous Nenjiang Formation in the northern Songliao Basin were analyzed by means of strata slicing in seismic-sedimentologic studies and combined with detrital and heavy mineral components tests.A sedimentary distribution model of meandering river-delta-ake sedimentary systems in the Nenjiang Formation was established based on the studies of palaeocurrent direction.It was concluded that the deposition of the Nenjiang Formation was controlled by the eastern and northeastern deltas.The northeastern sources played important roles during the deposition of the 1st member of the Nenjiang Formation and the palaeocurrents were SN oriented along down-slop.After the maximum lake flooding during the 2nd and 3rd members of the Nenjing Formation,the northeastern sources were taken place by the eastern ones and the palaeocurrents changed to be EW oriented along down-slope.The sedimentary model provides geologic support for petroleum exploration in Heidimiao reservoir in the north of the Songliao Basin.更多还原