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综合利用地震、测井等地质资料,运用层序地层学方法和技术,建立了层序地层格架和对比模式,对研究区古近系Em组地层的发育展布特征以及沉积环境进行了研究。Em组顶底均为区域上的不整合面,内部划分为两期基准面升降体系域。构造运动和沉积物供应控制下的基准面升级使得沉积初期研究区发育辩状河-曲流河沉积体系,至晚期演变为曲流河沉积体系。
Based on the comprehensive utilization of the geological data such as seismic and logging data, the sequence stratigraphy framework and contrast model are established by using sequence stratigraphy methods and techniques, and the development and distribution characteristics and sedimentary environment of the Em Formation in the Paleogene of the study area are studied . The top and bottom of the Em group are all unconformities on the area, which are divided into two phases of datum elevation system tract. Tectonic movements and the upgrading of datums under sediment supply control led to the development of the Pleistocene - meandering river sedimentary system in the initial depositional area, which eventually evolved into a meandering river sedimentary system.