利用高分辨率层序地层学和储层构型分析法,对基准面变化与曲流河砂体内部建筑结构特征,特别是基准面变化与夹层的发育程度、夹层产状等之间的关系进行深入研究.结果表明:NmⅢ和NmⅡ油组发育3个完整的中期基准面旋回、2个不完整的中期基准面旋回、12个短期基准面旋回和19个超短期基准面旋回；基准面旋回类型可以划分出向上变深和向上变浅两种非对称型,以及以上升半旋回为主的不完全对称型和上升与下降半旋回近于相等的近完全对称型；基准面低时,河道砂体宽而缓、且侧向切割严重,边滩较发育,侧积层倾角小、钻遇频率低；基准面高时,河道窄而深,河道砂体镶嵌在泥岩中呈孤立条带状产出,边滩发育程度低而堤岸亚相较发育,侧积层倾角大、钻遇频率高.%The base-level change and the inter-architectures of meandering river sands, especially the relationship among the base-level change and the development degrees of intercalations and the intercalations occurrence were researched by using the high-resolution sequence stratigraphy and the reservoir architecture element analysis. The conclusions are as follows; The Nm II & Nm III oil groups develop three complete mid-term base-level cycles, two incomplete mid-term base-level cycles, twelve short-term base-level cycles and nineteen ultra-short term base-level cycles. The types of the base-level cycles can be divided into upward-deepening and upward-shallowing asymmetry, incomplete symmetry dominated by uprising, and nearly complete symmetry. When the base-level is low, the channels are wide and cut each other seriously, the point bars are developed , and the inclinations and the drilling frequencies of later-accretion layers are small. When the base-level is high, the single channel is narrow and deep, so the channel sands bindingly insert into the mudstones, the development degrees of point bars are poor, but the embankments are developed, and the inclinations and the drilling frequencies of later-accretion layer are high.
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