泌阳断陷下第三系核三上段包括三个跨时分别为１０８，１４０，１０２Ｍａ的陆相层序，在双河赵凹地区表现为冲积扇扇三角洲—湖相沉积体系配置。在这三个陆相层序中，共发育１３个小层序组，其中可识别的小层序达５０多个，其内部沉积微相达１０余种。据此，采用Ｆｉｓｃｈｅｒ图解法，求取了其可容空间变化速率曲线。在此基础上，采用自行研制的定量层序地层模拟系统，模拟了研究区下第三系核三上段沉积时期，可容空间变化过程与陆相层序响应特征。研究结果表明：泌阳断陷湖盆双河赵凹地区下第三系核三上段的三个陆相层序，均为高匀速物源供给条件下形成的，其中Ｓ４层序的水进体系域，应列为该区油气勘探的重要目标层段 The third upper member of the Tertiary core in Biyang fault depression includes three continental sequences with time intervals of 108,140,102Ma, respectively. They are alluvial fan-delta Sediment system configuration. In the three terrestrial sequences, a total of 13 small sequence groups were developed, of which more than 50 were identified as small sequences and more than 10 were micro-facies sediments. According to this, Fischer graph method was used to get the curve of rate of changeable space. On this basis, the quantitative sequence stratigraphic simulation system developed by ourselves is used to simulate the response characteristics of the spatial variation and the terrestrial sequence during the deposition of the upper third member of the Lower Tertiary in the study area. The results show that the three terrestrial sequences of the upper third member of the Upper Third Member in the Zhaohou area, Biyang faulted basin, are all formed under the conditions of high uniform velocity source supply, in which the S4 sequence water system The area should be listed as an important target reservoir for oil and gas exploration in this area