泌阳断陷下第三系核三上亚段层序地层学研究

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。

Study on Sequence-stratigraphy of the Upper Member of EH3in Biyang Fault Basin

Based on the recognization markers of the continental sequence in the seismic profile and log curves and the lithological and mineralogical cyclic features,and by using analytical technique of depositional cycles and Fischer diagram method,the upper submember of the Tertiary EH 3 in Biyang fault Basin of the Shuanghe Zhao ao area is devided into three continental sequences,with the depositional system presenting a special configuration of fluvial fan fan delta lacustrine facies.In the continental sequences are developed 13 parasequence sets,with more than 50 parasequences being recognizable.In light of common features in the development of the above mentioned three continental sequences of the object beds in the study area and on the basis of correlation of the sequences in the connecting well sections,an isochronous stratigraphical frame model of the continental sequences of the object beds in the study area is established.