南堡凹陷第三系沉积特征及层序地层学研究

本文从沉积环境，沉积旋回性研究出发，对南堡凹陷下第三系层序地层学特征进行了研究。将下第三系分为下层序（Ｅｓ３＾５－Ｅｓ３＾１），中层序（Ｅｓ２－Ｅｓ１），上层序（Ｅｄ３－Ｅｄ１）３个层序。并分析了层序结构，体系域特征；探讨了层序，体系域与不同级辊沉积旋回之间的关系；解剖了南堡凹陷各组段，各体系域发育的沉积体系及硝体类型；总结了各种砂体的分布规律及含油性，对进一步的勘探前景作出了预测。

SEDIMENTARY FEATURES AND SEQUENCE STRATIGRAPHY OF EOGENE SYSTEM IN NANPU DEPRESSION

Sequence stratigraphy of Eogene system in Nanpu depression is studied mainly from sedimentary environments and sedimentary cycles. Eogene beds are divided into three sequences.They are the lower sequence (Es3), the middle sequence (Es2-Es1 ) and the upper sequence(Ed). The paper analyzes and discusses the sequence configuration, the system tract featuresand the relations between sequneces or system tracts and various levels of sedimentary cycles. Sedimentary system and sandbody types developing in each formation and system tractare picked out. Distribution and petroleum accumulation of all kinds of sandbodies are evaluated, and future exploration areas are predicted.