【摘要】 高精度层序地层为储层精细对比提供了重要手段。应用高精度层序地层学的理论和方法,以岩心、测井资料、地震资料和野外露头为基础建立了塔北隆起中部东河塘组高精度层序地层格架。塔北隆起中部东河塘组由一个完整的海平面升降旋回构成一个三级层序,以其内部相对稳定的水进面为界进行高精度层序划分,可划分出6个四级层序。通过野外露头对比、岩心观察、测井及地震特征的对比,在层序内部识别出浪控三角洲和滨岸沉积体系,明确了沉积体系的分布规律,总结了物源供给、古地貌及海平面变化等因素对沉积体系发育的控制作用。更多还原

【Abstract】 High-resolution sequence stratigraphy provides an important method for reservoir hierarchy correlation.With the application of high-resolution sequence stratigraphic theory and method,the high-resolution sequence stratigraphy framework of the Donghetang Formation in the central Tabei Uplift was established based on the analysis of well logs,core,outcrop and seismic data.As a third-order sequence,the Donghetang Formation consists of a complete eustatic cycle.According to its relatively stable transgressive surface,it can be divided into six 4th order sequences.Wave-dominated deltas and coastal sedimentary systems were recognized within the sequence and their distribution patterns were defined.It can be concluded that the development of depositional systems are controlled by provenance,palaeogeomorphology and sealevel change.更多还原