【摘要】 以层序地层学的原理为指导 ,从地震层序、测井曲线、沉积层序分析入手 ,对东营凹陷沙河街组沙三、沙四段层序地层格架进行了研究 ,划分出 4个三级层序 ,并划分出了体系域 ,确立了地层格架。其中 ,层序Ⅰ相当于河街组四段上亚段 ,发育低水位体系域、湖侵体系域和高水位体系域 ,是一个完整的旋回。层序Ⅱ代表的是沙三段下亚段沉积 ,低位体系域不发育 ,只发育湖侵体系域和高水位体系域。层序Ⅲ代表沙三段中亚段沉积 ,与层序Ⅱ有类似特征。层序Ⅱ、Ⅲ均为T -R旋回的沉积。层序Ⅳ发育三分体系域。更多还原

【Abstract】 Based on the basic principle of sequencestratigraphy, startedwith the analysis of seismic stratigraphy,logging cruve, sequence of sedimentary, the paper divided the sequence of shahejie Formation into four sequences and established it’s stratigraphic framework from the discussion of sedimentarysystem tracts in the sequences.The sequenceⅠcorresponds to the upper submember of MemberⅣof Shahejie Formation(formingLowstand system tracts,water transgressionsystem tracts and highstand system tracts)is a complete cycle.The sequenceⅡ represents the lower submember of MemberⅢ of Shahejie Formation, characterized by lowstand system tracts undeveloped,only lacustrine transgressionsystem tracts and highstand system tracts developed. The sequenceⅢ represents the mid-submember sedimentation of MemberⅢ of Shahejie Formation and has similar nature ofthesequenceⅡ. SSⅡand SSⅢ are all T-R cyclicsedimentation. The sequence Ⅳdevelops a three-divided system tracts.更多还原