新疆石油地质

新疆石油地质 ›› 2011, Vol. 32 ›› Issue (6): 600-604.

• 油气勘探 • 上一篇    下一篇

塔里木盆地寒武–奥陶系白云岩成因及分布规律

郑剑锋1a, 沈安江1b, 刘永福2, 陈永权2   

  1. 1.中国石油a.杭州地质研究院;b.碳酸盐岩储层重点实验室,杭州 310023;
    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
  • 收稿日期:2011-03-29 出版日期:2011-12-01 发布日期:2020-08-20
  • 作者简介:郑剑锋（1977-）,男,浙江龙游人,工程师,硕士,沉积储层,（Tel）0571-85223293（E-mail）zhengjf_hz@petrochina.com.cn.
  • 基金资助:
    国家科技重大专项（2008ZX05004-002）

Genesis and Distribution of the Cambro-Ordovician Dolomite in Tarim Basin

ZHENG Jian-feng1, SHEN An-jiang1,2, LIU Yong-fu3, CHEN Yong-quan3   

  1. 1. Hangzhou Institute of Petroleum Geology, PetroChina, Hangzhou, Zhejiang 310023, China;
    2. Key Laboratory of Carbonate Reservoir, CNPC, Hangzhou, Zhejiang 310023, China;
    3. Research Institute of Exploration and Development, Tarim Oilfield Company, PetroChina, Korla, Xinjiang 841000, China
  • Received:2011-03-29 Online:2011-12-01 Published:2020-08-20

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摘要： 塔里木盆地寒武-奥陶系发育的白云岩主要有4 种成因,分别对应萨布哈、渗透回流、埋藏、热液等4 种白云石化模式,根据岩石学和地球化学特征可以较好地识别出这4 种白云岩。综合分析古地理、古气候等背景资料,总结了塔里木盆地不同成因白云岩在垂向及平面上的分布规律：萨布哈白云岩和渗透回流白云岩的发育受沉积相控制,主要发育于中下寒武统;埋藏白云岩的发育受成岩相控制,物性好的台缘、台内礁滩体及有裂缝沟通构成的开放体系最容易先发生埋藏白云石化作用;热液白云岩主要发育在具有上覆隔挡层的不整合面之下地层及大断裂发育带附近。

关键词: 塔里木盆地, 寒武系, 奥陶系, 白云岩, 成因, 分布规律

Abstract: The dolomites of Cambro-Ordovician in Tarim basin are of four geneses, corresponding with four kinds of dolomitization ones such as sabakha dolomite, seepage reflux dolomite, buried dolomite and hydrothermal dolomite, which can be properly identified from the lithologic characteristics and geochemical characteristics. This paper comprehensively analyzes the paleogeographic and paleoclimate data, concludes the vertical and lateral distributions of dolomites with different geneses in Tarim basin: the development of sabakha dolomite and seepage reflux dolomite are controlled by sedimentary facies and mainly developed in Lower-Middle Cambrian; the development of burial dolomite are controlled by diagenetic facies, but the reef and shoal with high porosity as well as open system connected with fracture passage are easy to dolomitize; hydrothermal dolomite mainly develops below unconformity and near the discordogenic fault.

Key words: Tarim basin, Cambrian, Ordovician, dolomite, genesis, distribution

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