山东惠民凹陷沙四段上亚段层序地层与沉积特征SEQUENCE STRATIGRAPHY AND SEDIMENTARY SYSTEM OF THE UPPER Es4 IN THE HUIMIN DEPRESSION,SHANDONG
田继军,姜在兴,赵英杰
摘要(Abstract):
应用层序地层学方法,通过钻井、测井、地震反射等标志,将惠民凹陷沙四上亚段划分为1个三级层序,并以地层叠置样式、岩性、岩相的变化细分为低位、湖侵和高位3个体系域;在连井剖面层序对比的基础上建立起研究区沙四上亚段层序地层格架。通过岩芯、钻井、测井、古生物等资料的分析识别出沙四上亚段主要发育扇三角洲、近岸水下扇、浊积扇、三角洲、滩坝、湖泊等沉积体系,并建立了不同构造带的沉积模式。首次系统分析了惠民凹陷沙四上亚段沉积相的构成、演化与分布规律,并预测了有利沉积相带,这对指导研究区隐蔽油气藏的勘探具有重要意义。
关键词(KeyWords): 层序地层;沉积体系;有利沉积相带;沙河街组;古近系;惠民凹陷;山东
基金项目(Foundation): 国家自然科学基金项目“断陷盆地可容空间转换系统研究”(No.40672078)资助
作者(Author): 田继军,姜在兴,赵英杰
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