【摘要】 以高分辨率层序地层学原理为指导,利用测井、钻井和野外剖面资料,对鄂尔多斯盆地西峰油田延长组不同级次基准面旋回进行了详细划分,建立了西峰油田延长组高分辨率层序地层格架,将延长组划分为1个超长期、5个长期、13个中期和36个短期基准面旋回,其中短期基准面旋回细分为2大类3种结构,中、长期基准面旋回通常以对称型结构为主,区域分布较稳定。分析了不同级别的基准面旋回叠加式样与沉积相展布和演化规律的响应关系。更多还原

【Abstract】 On the basis of a comprehensive study of core,log well and outcrop profile,taking the the high resolution sequence stratigraphic theory as a direction,the detailed analysis on the subdivision of different orders of the base-level cycles in Yanchang formation has been performed and a corresponding high resolution sequence framework has been established in Xifeng oilfield,Ordos basin.Yanchang formation can be divided one super-long,5 long,13 middle and 36 short base-level cycles.The short base-level may be divided two types of cycles that consist of six subtypes.The middle and long base-level cycles are usually of symmetric structures.The authors analyse the relationship between the stacking pattern of different orders of the base-level cycles and the distribution and evolution law of sediment facies.更多还原