Since 1987,the sequence stratigraphy has been brought forward by Vail and others.It is particularly concerned about the development of petroleum geology.Sequence stratigraphy provides a unified framework with potential for many sedimentary geology.Based on A.T.Cross datum cycle sequence classification and nomenclature,we are considering the interface level,including the sequence structure and interracial properties.The stacking pattern of Fuyu oil group of 431 wells were from the point to the line sequence division and correlation.In previous research,we think Songliao Zhao sag of Fuyu basin should be devided into three (FⅡ-FⅠ oil group):2 long term cycles,5 middle term cycles and 12 short-term cycles.%以A.T.Cross提出的基准面旋回层序级别划分和命名原则为基础,同时考虑了层序结构、界面级别、叠加样式和界面性质,对431口钻井的扶余油层组进行了由点到线的层序划分和对比,在前人研究的基础上,将松辽盆地三肇凹陷扶余油层(FⅡ-FⅠ油组)划分为2个长期旋回、5个中期旋回和12个短期旋回.
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