China Petroleum Exploration ›› 2009, Vol. 14 ›› Issue (2): 46-49,7.

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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

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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