东营凹陷牛38井沙三段高分辨率旋回地层研究HIGH RESOLUTION CYCLOSTRATIGRAPHIC STUDY ON THE THIRD MEMBER OF SHAHEJIE FORMATION OF DRILL CORE NIU38 IN THE DONGYING DEPRESSION,SHANDONG PROVINCE
姚益民,徐道一,李保利,张海峰,张守鹏,姚盛
摘要(Abstract)：
自然伽玛测井资料取自山东省东营市胜利油田的牛38井。该井的沙河街组划分为四个段,其中沙三段依据含艾氏鱼群组合的鲱科化石和沉积物旋回堆积速率(AR)等研究,可与北美始新统绿河组进行对比。根据上世纪90年代沙三段古地磁研究结果,井深3263m处C18n.1n/C18n.1r界线调整为38.975MaBP。通过频谱分析和数字滤波计算,得出了沙三段几个界线的年龄值,其中,在沙三下、中亚段界线算出的36.9MaBP,岁差旋回幅度有明显变化,这一变化与Palike(Palikeetal.,2001)在ODP71线1052孔中发现的类似图像(36.7Ma)可比较。
关键词(KeyWords)： 旋回地层;自然伽玛测井;沙河街组;始新世;东营凹陷;山东
基金项目(Foundation): 中石化“东营凹陷成烃成藏定量研究”课题及国家自然科学主任基金项目(No40542007)资助
作者(Author): 姚益民,徐道一,李保利,张海峰,张守鹏,姚盛
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