濮城油田沙二上1砂组末端扇沉积体系研究

曲流河、辫状河、网状河和若干三角洲的沉积模式目前已成为对比和解释古河流岩石层序的标准框架。但是，近来的野外资料和钻井资料证明，应该把末端扇模式加入上述沉积模式表中。末端扇的作用、地貌、有关的沉积物及沉积学特征相比河流体系及三角洲体系差距较大。通过大量的岩芯观察和描述，结合测井资料、区域地质资料及各项分析鉴定资料等进行综合分析，对东濮凹陷濮城油田沙二上亚段1砂组的沉积特征与沉积相进行了较全面的分析，认为该地区主要为末端扇沉积体系，在对末端扇的岩性、沉积相序、沉积微相特征分析的基础上，研究了末端扇的识别标志并建立了末端扇的沉积模式。

Terminal Fan Deposition System in the First Sand Bodies of the Upper Section of Member 2,Shahejie Formation in Pucheng Oilfield

The depositional models of meandering river, braided river, anastomosed river and several delta have become the standard frames in comparing and interpreting the lothologic sequence in ancient rivers. But, it is very necessary that terminal fans is included in the depositional models by field and drilling data. The role, physiognomy, relevant deposits and sedimentology of terminal fans are different from delta regime. It is the deposition feature and sedimentary facies of the first zones of the upper section of member 2, Shahejie Formation in Pucheng Oilfield that are analyzed based on the abundant core data and the multidisciplinary analysis of well logging data and regional geology data. Result indicates the field is the terminal fan depositional system. On the base of researching in lithology, sedimentary facies sequence and sedimentary microfacies characteristics, the depositional model of terminal fans is established.