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根据陆相层序在地震剖面及电测曲线上的识别标志和在岩石矿物学方面的旋回性特征，采用沉积旋回分析技术及Ｆｉｓｃｈｅｒ图解法，将泌阳断陷双河—赵凹地区下第三系核三段上亚段划分为３个陆相层序，其沉积体系呈现冲积扇—扇三角洲—湖相空间配置关系。在这３个陆相层序中共发育小层序组１３个，其中可识别的小层序达５０余个。针对研究区目的层段所划３个陆相层序发育的共同特点，在连井剖面层序地层对比的基础上，编制了研究区目的层段的陆相层序地层等时框架模式。
According to the recognition sign of terrestrial sequence on the seismic profile and the electric measuring curve and the cyclic characteristics in the rock mineralogy, the sedimentary cycle analysis technique and Fischer graph method were used to divide the Biyang-Zhaoqiu area The upper member of the third member of the third member is divided into three terrestrial sequences, and the sedimentary system presents the configuration of alluvial fan-fan delta-lacustrine space. In the three terrestrial sequences, a total of 13 small sequences were developed, of which more than 50 were identified as small sequences. Aiming at the common features of the development of three terrestrial sequences developed in the target interval of the study area, an isochronous framework model of the terrestrial sequence stratigraphy was developed based on the sequence stratigraphy correlation in the continuous well section.