新疆石油地质

新疆石油地质 ›› 2007, Vol. 28 ›› Issue (2): 248-251.

• 讨论与争鸣 • 上一篇    下一篇

塔里木盆地累托石的发现及其地质意义

赵杏媛1, 张宝收2   

  1. 1.中国石油 石油勘探开发科学研究院, 北京 100083;
    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:2006-07-18 修回日期:2006-09-23 出版日期:2007-04-01 发布日期:2020-07-31
  • 作者简介:赵杏媛(1936-), 女, 河北安平人, 高级工程师, 粘土矿物,(Tel) 010-62398146.

Discovery of Rectorite and Its Geologic Significance in Tarim Basin

ZHAO Xing-yuan1, ZHANG Bao-shou2   

  1. 1. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China;
    2. Research Institute of Exploration and Development, Tarim Oilfield Company, PetroChina, Korla, Xinjiang 841000, China
  • Received:2006-07-18 Revised:2006-09-23 Online:2007-04-01 Published:2020-07-31

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摘要： 通过X射线衍射、扫描电镜、差热等多种手段分析,发现塔里木盆地志留系某些层段沉积砂岩中存在累托石粘土矿物,但其不是伊利石层和蒙脱石层完全按1:1规则交替排列的典型累托石,可称“似累托石”。该累托石属于沉积-成岩作用成因,是在pH值为4~5的弱酸性水介质、120℃左右或更高一些的温度条件下,由钙蒙脱石加积转化而成的钾累托石。累托石的研究成果对于地层划分与对比、储集层物性及油气藏的形成等方面的研究有重要意义。

关键词: 塔里木盆地, 累托石, 粘土矿物, 地层对比, 油气藏

Abstract: Rectorite, a clay mineral, was discovered in Silurian sandstone strata in Tarim basin by means of XRD, SEM, DTA, etc. Because the rectorite is not composed of 1:1 alternate arrangement of illite-montmorillonite layers, it could be named "pararectorite". The study indicates that the pararetorite belongs to K-rectorite transformed by Ca-rectorite, and sedimentation-diagenesis origin in weak acidic aqueous media with pH value ranging from 4 to 5 and under 120℃ or more. The results from the pararectorite research will be of great significance to the stratigraphic classification or comparison, the reservoir rock feature and the formation of the hydrocarbon reservoirs in Tarim basin.

Key words: Tarim basin, rectorite, clay mineral, stratigraphic comparison, oil-gas reservoir

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