据层序地层学与沉积学理论，利用地震、钻井、录井、测井等资料，以覆盖研究区的三维地震资料为主要依据，识别不同级别层序界面。明确了白垩系内部层序地层格架，共发育4个三级层序，清水河组层序为三分结构，其余层序为二分结构。层序形成过程中，三分层序主要受控于古气候，二分层序主控因素是构造运动。格架约束下的沉积响应表现为：湖侵域主要发育滨浅湖滩坝，湖退域主要发育缓坡型扇三角洲。%Under the direction of principles of sequence stratigraphy and sedimentology,comprehensive use the seis-mic、drilling、logging and well-logging data.Based on the 3D seismic data covered the study area,identify the sequence boundary,and combine well with seismic to mutual authenticated, finally establish the sequence stratigraphic framework of cretaceous of chepaizi area.Cretaceous can be subdivided into 4 third-order sequences. The sequence of Qingshuihe Formation can be divided into 3 system tracts,and the other sequences can be divided into 2 system tracts.During the for-mation of sequence,climate dominate the formation of two stratified sequence,and tectonic movements dominate the for-mation of three stratified sequence.And in the transgressive system tracts mainly develop beach-bar sand body, in the re-gression system tracts mainly develop flat slope fan delta.
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