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根据参照井处的沉积相迁移特征及体系域叠置样式，将泌阳断陷陆相层序划归为两种类型（Ⅰ型和Ⅱ型）。双河赵凹地区下第三系核三上段包括跨时分别为１．０８，１．４０和１０２（Ｍａ）的３个Ⅱ型陆相层序，由南向北呈现冲积扇扇三角洲湖泊三角洲的沉积体系空间配置。泌阳断陷陆相层序的体系域具四分性，其小层序组类型有４种：低位加积型、退积型、高位加积型和进积型。综合利用研究区的钻井、测井及地质资料，根据下第三系核三上段地震相平面展布特征，将地震相转换为沉积相，并由此归纳出研究区核三上段的沉积模式。针对研究区目的层段所划３个陆相层序发育的共同特点，建立了断陷湖盆陡坡带陆相层序地层岩相格架模式。对连井剖面层序地层进行了对比，编制了研究区目的层段的年代层序地层框架模式。
According to the migration characteristics of sedimentary facies at the reference well and the superimposition pattern of the system domain, the terrestrial sequence of Biyang fault depression is classified into two types (type I and type II). The upper third member of the Third Member of the Lower Tertiary in the Zhaohe area of Shuanghe consists of three type Ⅱ terrestrial sequences spanning 1.08, 1.40 and 1.02 Ma respectively, showing alluvial fan-delta from south to north Sedimentary System Spatial Distribution in the Lake Delta. The diagenetic sequence system of the Biyang fault depression has a tetrad, with four types of small-sequence sequences: low-level plus type, retrograde type, high-level accretion type and progradation type. Based on the drilling, logging and geological data of the study area, the seismic phase is converted to sedimentary facies according to the phase-plane distribution characteristics of the third upper third core of the Lower Tertiary and the depositional patterns of the upper third core of the study area are summarized. According to the common features of the development of three continental sequences in the target interval of the study area, a facies-and-shelf pattern of continental sequence stratigraphy in the steep slope zone of the fault depression lake basin was established. The sequence stratigraphy of the continuous well section is compared and the chronological stratigraphic framework model of the target section of the study area is compiled.