Abstract: Based on Cross T.A. genetic sequence stratigraphy theory, the high resolution sequence stratigraphy for the upper Shangganchaigou Formation in West Qaidam Basin is analyzed. Through key interface recognition and logging data integrated with core analysis, the aimed segment is divided into one long term base level cycle, five intermediate term cycles and about 17 to 20 short term cycles.The deposition structure and stacking patterns,depositional faces of different level cycles in braid river-delta environment are analyzed, and also the important function of these analysis to reservoir evaluation is discussed.

Key words: Qaidam Basin, High resolution sequence stratigraphy, base level cycle, reservoir evaluation

摘要： 应用Cross成因地层理论对柴达木盆地西部上干柴沟组上段进行了高分辨率层序地层划分。通过关键界面的识别和测井资料的综合分析，将目标层段划分为1个长期基准面旋回，5个中期旋回和17～20个短期旋回，分析了不同级别旋回的结构、叠加样式和沉积微相特征，总结了它们在辫状河-三角洲沉积体系内的分布规律，并探讨了对储层预测的重要意义。

关键词: 柴达木盆地, 高分辨率层序地层, 基准面旋回, 储层预测