高分辨率层序地层模式及油气地质意义--以沾化凹陷下第三系为例

分析了高分辨率地震、测井和岩相资料以识别和划分层序界面。结果表明：沾化凹陷下第三系为1个构造层序（TS1），发育的三个构造幕及二级气候旋回对应于3个超层序（SS1-3），分别与盆地演化的阶段性相当，在其内部可进一步划分为12个Ⅱ级层序和46个Ⅳ层序。层序的形成主要受控于沉积基准面三级升降旋回；在过程的每一个演化阶段，其短期基准面旋回的结构和叠加样式不同，反映了由空间变化和物源供给决定的体系域构成特征。

High-Resolution Sequence Stratigraphic Models and Its Petroleum Geological Significance of Lower Tertiary in Zhanhua Sag

The data of well logging , drilling core, and seismic survey were analyzed to recognize and divide the high resolution sequence stratigraphy. The result shows that the Tertiary Sag in Zhanhua is a tectonic sequence. The 3 structural episodes and second order climatic cycles are correspondent with the 3 super sequences (SS 1 3 ) as well as the 3 evolution stages of the basin. 12 third order sequences and 46 fourth order sequences may also be divided. The formation of the sequence is controlled mainly by the third order cycle of sedimentary base levels. For each evolution stage, the texture and superposition pattern of the base level cycles are different , showing that the space variation and material supplication determines the features of the system.