新疆石油地质

新疆石油地质 ›› 1997, Vol. 18 ›› Issue (4): 307-312.

• 地质勘探 • 上一篇    下一篇

塔西南坳陷下奥陶统风化壳中地开石的发现及其意义

赵杏媛   

  1. 塔里木石油勘探开发指挥部勘探研究中心 新疆库尔勒 841000
  • 收稿日期:1996-12-18 出版日期:1997-12-01 发布日期:2021-01-18
  • 作者简介:赵杏媛 女 高级工程师 粘土矿物

DISCOVERY OF DICKITE AND ITS SIGNIFICANCE IN WEATHERING CRUST OF LOWER ORDOVICIAN, SOUTHWEST DEPRESSION IN TARIM BASIN

Zhao Xingyuan   

  1. Tarim Petroleum Exploration and Development Headquarters, Korla, Xinjiang 841000
  • Received:1996-12-18 Online:1997-12-01 Published:2021-01-18
  • About author:Zhao Xingyuan, Female, Senior Engineer, Clay Mineral

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摘要： 地开石发育状况直接反映了地开石形成时储集层溶蚀孔隙发育、连通程度和上覆地层的温度条件,因而研究地开石对油气勘探有着重要的意义。我国仅在陕甘宁盆地塔里木盆地下奥陶统风化壳白云岩溶蚀孔中发现地开石,塔里木盆地地开石的发现表明,塔里木盆地西部,尤其是巴楚一麦盖提地区的下奥陶统风化壳是寻找天然气聚集的最有利地区。

关键词: 塔里木盆地, 早奥陶世, 风化壳, 高岭石, 异构体, 天然气, 储集层

Abstract: Dickite were only found in dolomite denudation pore in weathering crust(Lower Ordovician) in Shaanxi-Gansu-Ningxia and Tarim basins. Developing state of dickite directly reflects development and conectivity of denudation pore when it is formed and temperature condition of overlying formation, so studying dickite is very impotant to oil/exploration. Discovery of dickite in Tarim basin indicates that Lower Ordovician weathering crusts in westem Tarim basin(especially in Bachu-Maigaiti) are the most favourable area for gas accumulation.

Key words: Tarim basin, Early Ordovician, Weathering crust, Kaolinite, Isomer, Natural gas, Reservoir