【摘要】 以孤北～桩海地区古近系沙河街组为研究对象,通过大量的地震剖面解释,测井资料分析和钻井岩芯观察,在研究区沙河街组岩石学特征分析的基础上,详细研究了层序划分及层序特征。共划分出了SQ1、SQ2、SQ3三个长期旋回,S1～S2上、S2下～S3上、S3中、S3下、S4上、S4下六个中期旋回。深入讨论了各层序在地震剖面,钻井剖面及测井曲线上的特征,并详细论述了各层序的发育特征。更多还原

【Abstract】 Taking the Shahejie Formation of Paleogene tempestites in Gubei-Zhuanghai as a research object, the sequence distribution and the sequence character of the Shahejie Formation were studied based on lots of interpretation of seismic profiles, analysis of well logging and observation of drilling cores and the analysis of the petrology character. The Shahejie Formation was divided into two III-grade sequences in this paper, SQ1, SQ2 and SQ3, and it was divided into six intermediate cyclothems, S1～S2upper,S2low～S3upper,S3middle,S3loe,S4upper and S4low.The characteristics of the sequence were deeply discussed based on seismic profiles, drilling profiles and logging data. The developed characteristics of each sequence have also been discussed.更多还原