新疆石油地质

新疆石油地质 ›› 2008, Vol. 29 ›› Issue (6): 687-689.

• 油气勘探 • 上一篇    下一篇

柯坪剖面中上奥陶统萨尔干组黑色页岩地球化学特征

王飞宇1, 杜治利1,2, 张宝民3, 赵孟军3   

  1. 1.中国石油大学资源与信息学院，北京102200;
    2.中国石油塔里木油田分公司勘探开发研究院，新疆库尔勒841000;
    3.中国石油勘探开发研究院实验研究中心，北京100083
  • 收稿日期:2008-07-29 发布日期:2020-11-20
  • 作者简介:王飞宇（1963-），男，浙江黄岩人，教授，油气地质与地球化学，（Tel）010-89734547（E-mail）fywang@cup.edu.cn.

Geochemistry of Salgan Black Shales of Middle-Upper Ordovician in Keping Outcrop, Tarim Basin

WANG Fei-yu1, DU Zhi-li1,2, ZHANG Bao-min3, ZHAO Men-jun3   

  1. 1. Insitute of Resource and Information, China University of Petroleum, Beijing 102200, China;
    2. Research Institute of Exploration and Development, Tarim Oilfield Company, PetroChina, Korla, Xinjiang 841000, China;
    3. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China
  • Received:2008-07-29 Published:2020-11-20

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摘要： 塔里木盆地柯坪剖面中上奥陶统萨尔干组（O2-3s）为一套厚13.4 m 的夹灰色薄层状或透镜状灰岩的黑色页岩沉积，黑色页岩有机碳含量0.65%～2.83%，平均为1.63%. 黑色页岩的累计厚度约在11～12 m，有机质类型为Ⅱ型，有机质主要源于藻类和疑源类，黑色页岩的等效镜质组反射率值为1.58%～1.61%. 其形成与中奥陶世庙坡期（相当于Caradoc 期）全球性缺氧事件有关，表现为碳同位素明显地正向偏移，推测这一阶段与缺氧事件有关的高丰度源岩在塔里木盆地分布广泛，为塔里木盆地重要的烃源岩层段。

关键词: 塔里木盆地, 柯坪, 黑色页岩, 奥陶系, 烃源岩

Abstract: The Salgan formation of Middle-Upper Ordovician in Keping outcrop of Tarim basin is characterized by black shale deposit of 13.4 m in thickness intercalated with minor thin or lenticular limestone, with TOC of 0.65%～2.83%, averaging 1.63%, the total thickness of about 11～12 m, the organic matter of Type-II mainly originated from algae and acritarch. The equivalent vitrinite reflectance ranges from 1.58% to 1.61%. Its shape was related to global anoxic event of Caradoc period of Middle-Late Ordovician, with significant positive carbon isotopic excursion of carbonate. It is postulated that source rocks related to this event are widespread as major hydrocarbon source rocks in Tarim basin.

Key words: Tarim basin, Keping, balck shale, Ordovician, source rock

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