新疆石油地质

新疆石油地质 ›› 2003, Vol. 24 ›› Issue (5): 419-423.

• 油气勘探 • 上一篇    下一篇

塔里木盆地高岭石亚族形成条件

赵杏媛   

  1. 中国石油 石油勘探开发科学研究院,北京 100083
  • 收稿日期:2002-12-18 发布日期:2021-01-14
  • 作者简介:赵杏媛(1936-), 女,河北安平人,高级工程师,中国矿业大学和中国地质大学兼职教授,粘土矿物。

The Conditions for Formation of Kaoiinite Subgroup in Tarim Basin

ZHAO Xing-yuan   

  1. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China
  • Received:2002-12-18 Published:2021-01-14

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摘要： 高岭石亚族在塔里木盆地出现高岭石和迪开石两个种,二者具有各自的特征和形成条件。自生高岭石见于下侏罗统、三叠系、石炭系砂泥岩段和克拉2号构造储气层（下第三系、下白垩统）中,他生高岭石见于下奥陶统灰岩裂缝中;迪开石见于塔南民参1井石炭系砂岩中。根据高岭石、迪开石矿物特征分析了所在层位的沉积环境和成藏期的水体介质指出,晚泥盆世东河塘组沉积期轮南59、草2井区一带为闭塞海湾,东河1、2、4等井区则为近岸沉积,迪开石是在500℃构造热力条件下由高岭石晶体转化而来。

关键词: 塔里木盆地, 粘土矿物, 高岭石, 迪开石, 成因

Abstract: Kaolinite subgroup is found in Tarim basin as kaolin and dickite pieces, both have individual feature and forming con-dition. The authigenic kaolinite occurred in Lower Jurassic, Triassic, Carboniferous sand-shale member and Kela No.2 gas struc-tural zone (Palaeogene and Lower Cretaceous), allothigenous kaolinite appeared in Lower Ordovician limestone cracks. The dickite is found in Carboniferous sandstone of Mincan No.1 Well in southern Tarim. According to mineral features of kaolinite and dick-ite, the sedimentary environments of these horizons and water media at stage of hydrocarbon accumulation are analyzed. The re-sults suggest that Lunnan Well 59 to Cao-2 Well Block in period of Late Devonian Donghetang formation was smothered bay en-vironment, Donghe-1,2 and 4 Well Blocks were inshore deposition. The dickite is transformed from kaoline crystal under the condition of structural geotherm at 500°C.

Key words: Tarim basin, clay mineral, kaolinite, dickite, origin

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