东营凹陷沙四上亚段旋回地层学研究——以樊页1井为例  

Cyclostratigraphy Research on the Upper of 4th Member of the Shahejie Formation in Dongying Sag:a Case Study of FY1

作　　者：金忠慧 姜在兴[1] 张建国[1] 刘圣乾 陈骥[1] 赵琳洁[1] 雷华蕊 

机构地区：[1]中国地质大学(北京),北京100083

出　　处：《科学技术与工程》2017年第1期21-28,共8页Science Technology and Engineering

基　　金："十二五"国家科技重大专项(2011ZX05009-002)资助

摘　　要：对东营凹陷博兴洼陷樊页1井始新世的沙四上纯上亚段和沙四上纯下亚段自然伽马测井曲线进行小波分析和频谱分析,发现樊页1井沙四上亚段记录了米兰科维奇旋回。通过对黄赤交角周期进行高斯带通滤波,建立了精度为0.038 ka的樊页1井沙四上亚段"浮动"天文年代标尺。樊页1井沙四上亚段共记录了80个黄赤交角周期,据此确定沙四上亚段沉积的持续时间约为3.04 Ma。依据天文年代标尺计算出沙四上纯上亚段的沉积速率为0.09~0.1 m/ka,沙四上纯下亚段的沉积速率为0.105~0.147 m/ka。同时,天文旋回与岩性变化之间存在较好的对应,说明天文周期是湖相细粒沉积岩的一个重要控制因素。Spectral analysis and continuous wavelet analysis were conducted on the natural gamma-ray logging data from Eocene upper section of the upper of 4 th member of the Shahejie formation and lower section of the upper of 4 th member of the Shahejie formation of well FY1,which locates at Boxing subsag,Dongying sag. Prominent Milankovitch cycles were recorded in the upper of 4 th Shahejie formation in well FY1. The ＂floating＂astronomical time scales of accuracy of 0. 038 Ma of well FY1 was established through Gaussian band filtering of obliquity signals,meanwhile,80 obliquity cycles were recorded in the upper of 4 th member of the Shahejie formation in total.According to the foregoing,the duration of the upper of 4 th member of the Shahejie formation can be estimated as about 3. 04 Ma. The sedimentary rate of upper section of the upper of 4 th member of the Shahejie formation was0. 09 ~ 0. 1 m / ka,the sedimentary rate of lower section of the upper of 4 th member of the Shahejie formation was 0. 105 ~ 0. 147 m / ka according to the ＂floating＂astronomical time scales. At the same time,good correspondences were found between astronomical cycles and lithological changes,which indicates that astronomical period was an important controlling factor on lacustrine fine-grained sedimentary rocks.

关 键 词：东营凹陷 沙四上亚段 自然伽马测井曲线 旋回地层学 天文年代标尺 

分 类 号：TE121.34[石油与天然气工程—油气勘探]