西南石油大学学报(自然科学版) ›› 2011, Vol. 33 ›› Issue (3): 74-78.

• 地质勘探 • Previous Articles     Next Articles

The Relations Between the Evolution of Clay Mineral and Gas–Pool Forming in Ying–Qiong Basin

LIU Jing-huan WANG Rui-li
  

  1. Research Institute of Zhanjiang Branch, CNOOC, Zhanjiang, Guangdong 524057, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-06-20 Published:2011-06-20

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Abstract: Migration and accumulation of oil and gas in sedimentary rock will impact the change of diagenetic environment of sedimentary rocks and will also lead diagenetic minerals reaction. Adopting clay X–ray diffraction test, gas composition, and inclusion，combining with the different geological conditions of Ying–Qiong Basins, the factors which affect the abnormal evolution of illite/smectite interstratified radio are analyzed. The study shows the

abnormal evolution of illite/smectite in Ying–Qiong Basin is related to the migration and accumulation of hydrothermal fluid（hydrocarbon and carbon dioxide）. Different evolutionary model of illite/smectite reflects the difference
of migration path and difference fault structure of hydrothermal fluid, and is also related to the type and size of gas pool.

Key words:

illite/smectite, abnormal evolution, hydrothermal fluid, migration model

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