四川盆地涪陵地区五峰组-龙马溪组一段层序格架与沉积演化

发布时间：2019-03-08 21:48

【摘要】：利用野外露头、测井曲线、岩心等资料,结合层序地层学方法,在四川盆地涪陵地区五峰组-龙马溪组一段沉积构造认识的基础上,针对涪陵地区五峰组-龙马溪组一段层序格架与沉积演化开展了整体性的研究。研究表明:涪陵地区五峰组-龙马溪组一段可以划分出2个三级层序,五峰组-观音桥组为一个三级层序SQ1,由海侵体系域(TST)和高位体系域(HST)组成;龙马溪组一段可以划分为一个三级层序,由海侵体系域(TST)、早期高位体系域(EHST)、晚期高位体系域(LHST)组成;进一步,分析其层序构成特征并通过对层序地层格架的建立,提出了涪陵地区五峰组-龙马溪组一段层序受海平面、生物、火山等多因素控制的沉积演化模式,为开展页岩岩相等研究奠定了基础。
[Abstract]:Based on the field outcrop, logging curve, core data and sequence stratigraphy, based on the first member of Wufeng-Longmaxi formation in Fuling area, Sichuan Basin, the sedimentary structure of Wufeng formation-Longmaxi formation is recognized. An integrated study on the sequence framework and sedimentary evolution of the Wufeng-Longmaxi formation in Fuling area is carried out. The results show that the first member of Wufeng formation-Longmaxi formation in Fuling area can be divided into two third-order sequences, the Wufeng formation-Guanyinqiao formation is a third-order sequence SQ1, composed of transgression system tract (TST) and high system tract (HST). The first member of Longmaxi formation can be divided into a third-order sequence, which is composed of high-level system tract (LHST) in the early stage of transgression system tract (TST),) and high-level system tract (EHST),) in late stage. Based on the analysis of the sequence composition characteristics and the establishment of the sequence stratigraphic framework, the sedimentary evolution model of the first member of the Wufeng formation-Longmaxi formation in Fuling area, controlled by sea level, biology, volcano and other factors, is put forward. It lays a foundation for the study of shale equivalence.
【作者单位】：中国地质大学(武汉)海洋学院;中国地质大学(武汉)构造与油气资源教育部重点实验室;中国石化勘探南方分公司;中国石化江汉油田分公司勘探开发研究院;
【基金】：国家重点基础研究发展计划(973)项目(SQ2013CB021013)
【分类号】：P539.2

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