古地理学报 ›› 2025, Vol. 27 ›› Issue (3): 596-610. doi: 10.7605/gdlxb.2025.030

• 岩相古地理学及沉积学 • 上一篇    下一篇

鄂西地区下寒武统牛蹄塘组页岩层序地层格架及沉积演化*

段轲1,2,3(), 文剑航1,3, 张焱林1,3(), 刘早学1,3, 宋腾4, 李浩涵4   

  1. 1 湖北省地质调查院,湖北武汉 430034
    2 古生物与地质环境演化湖北省重点实验室,湖北武汉 430034
    3 资源与生态环境地质湖北省重点实验室,湖北武汉 430074
    4 中国地质调查局油气资源调查中心,北京 100083
  • 收稿日期:2024-05-10 修回日期:2024-09-26 出版日期:2025-06-01 发布日期:2025-05-29
  • 通讯作者: 张焱林,男,1984年生,高级工程师,长期从事页岩气地质调查研究。E-mail: hbgsylz@126.com。
  • 作者简介:

    段轲,男,1989年生,高级工程师,长期从事页岩气地质调查研究。E-mail:

  • 基金资助:
    *古生物与地质环境演化湖北省重点实验室开放研究基金课题(PEL-202005)

Stratigraphic framework and sedimentary evolution of the Lower Cambrian Niutitang Formation shale in western Hubei Province

DUAN Ke1,2,3(), WEN Jianhang1,3, ZHANG Yanlin1,3(), LIU Zaoxue1,3, SONG Teng4, LI Haohan4   

  1. 1 Hubei Geological Survey,Wuhan 430034,China
    2 Key Laboratory of Paleontology and Geoenvironment Evolution of Hubei Province,Wuhan 430034,China
    3 Key Laboratory of Resources and Environment Geology of Hubei Province,Wuhan 430074,China
    4 Oil & Gas Survey of China Geological Survey,Beijing 100083,China
  • Received:2024-05-10 Revised:2024-09-26 Online:2025-06-01 Published:2025-05-29
  • Contact: ZHANG Yanlin,born in 1984,is a senior engineer. He is mainly engaged in shale gas geological investigation and research. E-mail: hbgsylz@126.com.
  • About author:

    DUAN Ke,born in 1989,is a senior engineer. He is mainly engaged in shale gas geological investigation and research. E-mail: .

  • Supported by:
    Open Research Fund of the Key Laboratory of Paleontology and Geoenvironmental Evolution of Hubei Province(PEL-202005)

摘要:

下寒武统牛蹄塘组页岩是中上扬子地区重要的烃源岩。目前,对中上扬子地区下寒武统牛蹄塘组层序地层划分和层序地层格架建立等方面还存在较大分歧,尤其针对牛蹄塘组页岩的层序地层学研究相对较少。综合利用野外露头、钻井岩心、常规和能谱测井以及地球化学参数,对鄂西地区下寒武统牛蹄塘组页岩的层序地层格架及沉积演化进行了系统分析。研究表明,鄂西地区牛蹄塘组页岩可识别出2个三级层序,其中牛蹄塘组一段(牛一段)和牛蹄塘组二段(牛二段)分别为1个三级层序,均由海侵体系域(TST)和高位体系域(HST)组成。以体系域为单元,通过层序地层对比,分析了牛蹄塘组页岩沉积时的沉积环境演变与海平面变化,提出了早寒武世海平面变化的4个阶段,即波动上升期、波动下降期、快速上升期和逐步下降期,最后提出了系统的牛蹄塘组页岩沉积演化模式,为进一步开展中上扬子地区页岩气勘探的有利储集层评价及预测提供理论依据。

关键词: 页岩, 层序地层, 沉积演化, 牛蹄塘组, 鄂西地区

Abstract:

The shale of the Lower Cambrian Niutitang Formation is an important hydrocarbon source rock in the Middle and Upper Yangtze region. However,significant inconsistencies remain regarding the stratigraphic division and framework establishment of the Niutitang Formation in the Middle and Upper Yangtze region. Moreover,sequence stratigraphic studies focused specifically on the Niutitang shale are still limited. In this study,the stratigraphic framework and sedimentary evolution of the Lower Cambrian Niutitang shale in western Hubei Province were systematically analyzed using an integrated approach incorporating field outcrop observations,drilling core data,conventional and spectral logs,and geochemical proxies. Two third-order sequences are recognized within the Niutitang Formation shale in western Hubei Province. The first(Niu 1 Member)and second(Niu 2 Member)members each constitute a third-order sequence composed of a Transgressive Systems Tract(TST)and a Highstand Systems Tract(HST). Sequence stratigraphic correlation enabled the reconstruction of depositional environments and relative sea-level fluctuations,revealing four evolutionary phases during the Early Cambrian: a fluctuating transgressive stage,a fluctuating regressive stage,a rapid transgression,and a gradual regression. A comprehensive depositional model for the Niutitang shale is established,providing a theoretical foundation for predicting favorable reservoir intervals and guiding future shale gas exploration in the Central and Upper Yangtze region.

Key words: shale, sequence stratigraphy, sedimentary evolution, Niutitang Formation, western Hubei Province

中图分类号: