保山盆地羊邑组二～三段高分辨率层序地层分析

通过精细划分对比地层、深入分析层序结构、建立层序地层格架，综合分析了保山盆地的露头剖面、钻井岩芯、测井资料，在羊邑组二～三段内识别出了3类不同级次的层序界面。根据划分出的各层序界面将羊邑组二～三段细分为9个中期、31个短期、66个超短期基准面旋回层序。在此基础上，分析了各级次基准面旋回层序的垂向序列、岩性岩相组合、结构类型及叠加样式等特征，重点讨论了向上“变深”的非对称型和对称型2类超短期基准面旋回层序类型。进一步探讨了高分辨率层序地层学在扇三角洲-湖泊沉积体系的地层划分与对比、地层格架构建中的应用。

High Resolution Sequence Analysis of the 2nd and 3rd Member of Yangyi Formation in Baoshan Basin

Finely classifying and contrasting strata，analyzing sequence structure and establishing sequence strata framework are the research purpose of this research.By analyzing information of outcrop profile, drilling core and well logging,3 kinds of different sequence interfaces are distinguished in 2nd and 3rd member of YangYi Formation,which can be divided into 9 middle-term,31 short-term and 66 super-short-term base level cyclical sequences.Then,this research analyzes the characteristic of vertical sequence,lithofacies combination,structure type and stacking patterns of various tapered basal level cyclical sequence,and discusses two kinds of super-short-term base level cyclical sequences,which are upward-darken unsymmetrical and symmetric form developed in research interval.Further,the research discusses the application of high-resolution sequence stratigraphy in strata classification and correlation and sequence strata framework establishment in the fan-delta & lacustrine facies depositional systems.