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根据陆相地层层序在地震剖面、电测曲线上的识别标志以及在岩石类型和矿物成分上的特征，将泌阳断陷双河—赵凹地区下第三系核三上段划分为三个Ⅱ型层序，由南往北呈现冲积扇—扇三角洲—湖泊—三角洲的沉积体系空间配置。泌阳断陷陆相地层层序的体系域具有四分性，其准层序组类型有四种：低位加积型、退积型、高位加积到和进积型。在综合利用研究区钻井、测井及地质资料的基础上，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分三个陆相层序发育的共同特点，建立了泌阳断陷湖盆陆相层序地层岩相格架模式；在连井剖面展序地层对比的基础上，编制了研究区目的层段的年代层序地层框架模式。
According to the sequence of terrestrial stratigraphy in the seismic profile, the identification mark on the electrical measuring curve and the characteristics of rock types and mineralogical composition, the upper third member of the Lower Tertiary core in the Shuanghe-Zhaoou area of Biyang fault depression is divided into three Ⅱ type sequence, from south to north showing alluvial fan - fan delta - lacustrine - delta sedimentary system spatial configuration. The diagenetic stratigraphic sequence system in the Biyang fault depression has a tetrad, with four types of quasi-sequence groups: low-level accretion type, retrograde type, high-level accretion type and progradation type. Based on the comprehensive utilization of drilling, logging and geological data in 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 induction of the upper three Deposition mode. According to the common features of the three terrestrial sequences developed in the target interval of the study area, the geofacies pattern of continental sequence stratigraphy in the Biyang fault basin was established. Based on the contrast of sequence stratigraphy in the continuous well, The chronological stratigraphic framework model of the target section of the study area was prepared.