Lithologic Reservoirs ›› 2009, Vol. 21 ›› Issue (3): 18-22.doi: 10.3969/j.issn.1673-8926.2009.03.004

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Lithofacies and reservoir characteristics of Late Carboniferous-Permian volcanic rocks in Niudong block, Santanghu Basin

NIE Baofeng 1，2，YU Bingsong1，LIZhengke3，WEN Chuanjiang3，LIUYongshun2，SONG Benbiao4
  

  1. 1. State Key Laboratory of Geological Processes and Mineral Resources， China University of Geosciences， Beijing 100083， China； 2. College of Resources Environment and Tourism， Capital Normal University， Beijing 100037， China； 3. Research Institute of Exploration and Development， Tuha Oilfield Company， PetroChina， Hami 839009， China； 4. Research Institute of Petroleum Exploration & Development， PetroChina， Beijing 100083， China
  • Online:2009-09-16 Published:2009-09-16

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Abstract:

The rock types, lithofacies and reservoir characteristics of Late Carboniferous-Permian volcanic rocks in Niudong block of Santanghu Basin are analyzed. The main volcanic rocks are pyroclastic rocks and lavas. The volcanic pyroclastic rocks are composed of tuff, volcanic breccia and volcanic agglomerate, while the lavas are composed of basalt and basaltic andesite. Vesicular basalt and basaltic andesite mainly distributed in roof and floor of the flow unit. It is amygdaloidal basalt and basaltic andesite in the middle and upper part, and dense basalt in the middle and lower part. The primary pore in the roof and floor of amygdaloidal lava belt developed well, which is the favorable reservoir.

Key words: earth outgassing, deep geofluids, geodynamics, oil-gas origin

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