The characteristics and sources of natural gases from Ordovician weathered crust reservoirs in the Central Gas Field in the Ordos Basin

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• 作者：Xianqing Li (1) (2)
  Guoyi Hu (3)
  Jian Li (3)
  Dujie Hou (4)
  Peng Dong (1) (5)
  Zhihong Song (1) (5)
  Yunfeng Yang (1) (5)
  
• 关键词：natural gas ; Ordovician reservoir ; gas source ; Central Gas Field ; Ordos Basin
• 刊名：Chinese Journal of Geochemistry
• 出版年：2008
• 出版时间：June 2008
• 年：2008
• 卷：27
• 期：2
• 页码：109-120
• 全文大小：616KB
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• 作者单位：Xianqing Li (1) (2)
  Guoyi Hu (3)
  Jian Li (3)
  Dujie Hou (4)
  Peng Dong (1) (5)
  Zhihong Song (1) (5)
  Yunfeng Yang (1) (5)
  
  1. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing, 100083, China
  2. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
  3. Langfang Branch of PetroChina Petroleum Exploration and Development Research Institute, Langfang, 065007, China
  4. Energy College, China University of Geosciences, Beijing, 100083, China
  5. School of Resource and Safety Engineering, China University of Mining and Technology, Beijing, 100083, China
  
• ISSN：1993-0364

文摘

The Central Gas Field is a famous large-sized gas field in the Ordos Basin of China. However, identification of main gas sources of the Ordovician reservoirs in this gas field remains puzzling. On the basis of a lot of geochemical data and geological research on natural gases, the characteristics and sources of natural gases from Ordovician weathered crust reservoirs in the Central Gas Field in the Ordos Basin were studied. The results indicated that natural gases from Ordovician weathered crust reservoirs in the Central Gas Field in the Ordos Basin have similar chemical and isotopic compositions to highly mature and over-mature dry gases. Both coal-derived gases and oil-type gases coexist in the Central Gas Field in the Ordos Basin. The former was derived mainly from Carboniferous-Permian coal measures and the latter from Lower Paleozoic marine carbonates. It is suggested that coal-derived gases occur in the eastern part of the Central Gas Field while oil-type gases may be produced mainly in the northern, western and southern parts of the Central Gas Field in the Ordos Basin.