石油与天然气地质 ›› 2017, Vol. 38 ›› Issue (1): 165-174.doi: 10.11743/ogg20170117

• 油气地质 • 上一篇    下一篇

爱尔兰克莱尔盆地Ross Sandstone组深水浊积岩露头高分辨率层序地层学

张磊夫1, 吴陈君2, 苏洋3, 郭艳军1, 王红亮4   

  1. 1. 北京大学 地球与空间科学学院, 北京 100871;
    2. 甘肃省油气资源研究重点实验室/中国科学院油气资源研究重点实验室, 甘肃 兰州 730000;
    3. 中国石油 长城钻探工程技术研究院, 辽宁 盘锦 124010;
    4. 中国地质大学(北京) 能源学院, 北京 100083
  • 收稿日期:2016-11-09 修回日期:2016-12-20 出版日期:2017-02-28 发布日期:2017-02-27
  • 通讯作者: 王红亮(1971-),男,博士、副教授,沉积学与高分辨率层序地层。E-mail:whliang@cugb.edu.cn。 E-mail:whliang@cugb.edu.cn
  • 第一作者简介:张磊夫(1987-),男,博士,矿产普查与勘探。E-mail:leifu.zhang@pku.edu.cn。
  • 基金项目:

    中国博士后科学基金资助项目（2016M591016）。

High resolution sequence stratigraphy of the Ross Sandstone deepwater turbidite outcrops in the Clare Basin, Ireland

Zhang Leifu1, Wu Chenjun2, Su Yang3, Guo Yanjun1, Wang Hongliang4   

  1. 1. School of Earth and Space Sciences, Peking University, Beijing 100871, China;
    2. Gansu Provincial Key Laboratory of Petroleum Resources/Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Lanzhou, Gansu 730000, China;
    3. Engineering Technology Research Institute of GWDC, PetroChina, Panjin, Liaoning 124010, China;
    4. School of Energy Resources, China University of Geosciences(Beijing), Beijing 100083, China
  • Received:2016-11-09 Revised:2016-12-20 Online:2017-02-28 Published:2017-02-27

PDF (PC)

1465

被引次数

2

摘要：

应用高分辨率层序地层学原理和分析方法，通过对爱尔兰西海岸Ross Sandstone组深水浊积朵叶体露头的详细研究，基于侧向稳定展布的泥岩段、沉积构造与岩相组合、砂岩融合的程度以及沉积物的样式与厚度4个方面，建立了研究区高分辨率层序地层格架，探讨了深水浊积朵叶体的沉积模式及不同层次基准面旋回的控制因素。研究表明，富含有机质与棱菊石化石的远洋泥岩是长期基准面旋回的界面。在长期旋回内，侧向展布数千米至数万米的薄层泥岩夹粉砂岩是中期基准面旋回的界面。每一个中期旋回都由数个相互叠置的向上变厚旋回组成，单个向上变厚旋回通常由底部薄层泥岩夹粉砂岩开始，往上逐渐转变为厚层的无构造砂岩；其厚度通常为0.5~7 m，并可稳定延伸数百米至数千米，反映了朵叶体的持续前积作用。

关键词: 基准面旋回, 向上变厚旋回, 沉积模式, 高分辨率层序地层学, 深水浊积朵叶体, 克莱尔盆地, 爱尔兰

Abstract:

Using the principles and methods of high-resolution sequence stratigraphy,the Ross Sandstone deepwaterturbidite lobe outcrops in the coast of western Irelandare studiedbased on four factors:laterally extensive mudstones,sedimentary structures and lithofacies associations,degree of sand amalgamation and sedimentary pattern and thickness.The high-resolution sequence stratigraphic framework has been established,the depositional model of deepwaterturbidite lobe is proposed,and the controlling factors for base level cycles at different hierarchies are discussed.The results show that,the organic-rich pelagic mudstone with abundant goniatites represents the transition of two adjacent long-term base level hemi-cycles.Within the long-term base level cycle,each mid-term base level cycle is bounded by the thin mudstones with subordinate siltstones which can extend laterally several kilometers to tens of kilometers.Each mid-term cycle is composed of several thickening-upward cycles which are 0.5-7 m thick and several hundred meters to several kilometers across,suggesting continuous lobe progradation.

Key words: base level cycle, thickening-upward cycle, depositional model, high resolution sequence stratigraphy, deepwater turbidite lobes, Clare Basin, Ireland

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