石油与天然气地质 ›› 2010, Vol. 31 ›› Issue (4): 455-452.doi: 10.11743/ogg20100409

• 石油与天然气地质 • 上一篇    下一篇

塔中地区寒武-奥陶系白云岩成因类型及空间分布

  

  1. 中国科学院广州地球化学研究所，广东广州510640
  • 出版日期:2010-08-28 发布日期:2010-10-20
  • 第一作者简介:杨玉芳（1977—），女，博士研究生，构造地质、石油地质。
  • 基金项目:

    国家重点基础研究计划（973计划）项目（2006CB202406）;教育部博士点基金项目（20050425515）。

Genesis types and distribution pattern of the Cambrian and Ordovician dolomites in Tazhong area，the Tarim Basin

  • Online:2010-08-28 Published:2010-10-20

PDF (PC)

547

被引次数

9

摘要：

寒武-奥陶系白云岩是塔里木盆地下古生界碳酸盐岩中重要储集岩类，综合岩心、镜下、结构组分及宏观地质背景等各种特征，将塔中地区寒武-奥陶系白云岩划分为五种类型，重点对Ⅱ型细晶及Ⅲ型中粗晶白云岩显微结构特征进行了详细阐述，指出Ⅱ型细晶白云岩具三种产状两种结构特点。Ⅲ型白云岩可以以充填物形式产于大型缝洞内，具镶嵌状结构，可同时包含Ⅰ型和Ⅱ型白云岩。探讨了白云岩的沉积组合及空间分布规律，指出了蒸发海水型、混合水型、岩溶型、埋藏型、深部溶蚀型及同生砾屑云岩等各类型白云岩储层的有利发育区带。

关键词: 成因类型, 空间分布, 白云岩, 塔中地区, 塔里木盆地

Abstract:

The Cambrian and Ordovician dolomites are important reservoir rocks of Lower Paleozoic carbonate in Tarim Basin，which can be divided into five genesis types according to various characteristics such as cores，microscopic features，textural components and macro-geology. In this paper，the micro textures of TypeⅡfine crystalline dolomite and TypeⅢmedium-coarse crystalline dolomite are described in detail，with the fine crystalline dolomite characterized by three attitudes and two textures. The TypeⅢdolomite can occur in bigger caves and fractures as a fill，which has a mosaic texture and may contain both TypeⅠand TypeⅡdolomites. The sedimentary combination and distribution pattern of the dolomites are discussed，and the favorable development zones of various types of dolomite，such as evaporatedˉseawater type，mixedˉwater type，karstification type，burial type，deep-dissolution type and syngenetic rudaceous type，are pointed out.

Key words: genesis type, distribution, dolomite, Tazhong area, Tarim Basin

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