中国石油勘探 ›› 2009, Vol. 14 ›› Issue (2): 46-49,7.

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柴达木盆地西部南区沸石分布特征及成因

甘贵元,雷振锋,赵东升,李元奎,崔俊   

  • 出版日期:2009-04-15 发布日期:2009-04-15

Zeolite Distribution Characteristics andContributing Factors in SouthernRegion ofWest QaidamBasin

Gan Guiyuan,Lei Zhenfeng,Zhao Dongsheng,Li Yuankui and Cui Jun   

  1. Gan Guiyuan,Lei Zhenfeng,Zhao Dongsheng,Li Yuankui,Cui Jun//Research Institute of Petroleum Exploration and Development,PetroChina Qinghai Oilfield Company,Dunhuang City,Gansu Province 736202
  • Online:2009-04-15 Published:2009-04-15

摘要: 在柴达木盆地西部南区发现的沸石主要为方沸石,其呈粒状、块状分布在砂岩粒间孔、裂缝和碳酸盐岩溶蚀孔中。该区的沸石,既能够以交代方式形成,也可以低温—中温热液沉淀方式形成。方沸石交代亮晶方解石胶结物,钠沸石交代石英、长石碎屑颗粒。方沸石交代亮晶方解石,钠沸石胶结物中包裹早期方解石胶结物,说明沸石形成较亮晶方解石晚。呈块状分布的沸石,其发育段都是储层发育段,且多是油气层分布段。

关键词: 柴达木盆地, 西部南区, 沸石类型, 分布特征, 成因分析

Abstract: The zeolite found the southern region of West Qaidam Basin is mostly analcime. Grainy and massive zeolite is distributed in sandstone intergranular holes, cracks, and carbonate emposieu. The zeolite in the region can be formed by both metasomasis and mid-low temperature epithermal deposition. Analcime is distributed in sparry calcite cement, while natrolite is in quartz and feldspar clastic particles. Analcime is distributed in sparry calcite and early calcite cement is wrapped in natrolite cement, which shows that the formation of zeolite is later than that of sparry calcite. Massive zeolite is mainly developed in reservoirs, and mostly in oil and gas bearing intervals

Key words: Qaidam Basin, the southern region of West Qaidam Basin, zeolite types, distribution characteristics, contributing factors analysis

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