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

作　　者：姚益民[1] 徐道一[2] 李保利[1] 张海峰[1] 张守鹏[1] 姚盛[1] 

机构地区：[1]中石化胜利油田有限公司地质科学研究院,山东东营257015 [2]中国地震局地质研究所,北京100029

出　　处：《地层学杂志》2007年第3期229-239,共11页Journal of Stratigraphy

基　　金：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

摘　　要：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。The gamma-ray logs obtained from the Niu38 drill core located near the Shengli Oilfield in Dongying, Shandong Province. At this drill core, the Shahejie Formation （SHJF） is divided into 4 members. The Third Member of the Shahejie Formation （3MSHJF） can be approximately correlated to the Eocene Green River Formation in North America, on the basis of clupeid fish fossils of Knightia. According to the palaeomagnetic study on the 3MSHJF, the boundary between C18n. 1n and C18n. 1r of the drill core at depth 3 263m is estimated to be 38. 975MaBP in age. Based on the results obtained from spectral analysis and digital filter methods, several age estimates of lithostratigraphic boundaries within the 3MSHJF have been given, among which the boundary between the middle and lower parts of the 3MSHJF is estimated to be 36.9MaBP. Near this boundary, there is significant change in the amplitude of filtered precession cycles, which can be compared to similar patterns at 36. 7MaBP, reported from the Site 1052 of ODP71 Line by Palike et al. （2001）.

关 键 词：旋回地层 自然伽玛测井 沙河街组 始新世 东营凹陷 山东 

分 类 号：P534.61[天文地球—古生物学与地层学] P539[天文地球—地质学]