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TANG Yue, WANG Liang-liang, CUI Ze-hong. 2011: An analysis of the gas source in the Upper Triassic Xujiahe Formation, central Sichuan Basin. Geological Bulletin of China, 30(10): 1608-1613. DOI: 10.12097/gbc.20111014
Citation: TANG Yue, WANG Liang-liang, CUI Ze-hong. 2011: An analysis of the gas source in the Upper Triassic Xujiahe Formation, central Sichuan Basin. Geological Bulletin of China, 30(10): 1608-1613. DOI: 10.12097/gbc.20111014
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An analysis of the gas source in the Upper Triassic Xujiahe Formation, central Sichuan Basin

  • Development Research Center of China Geological Survey, Beijing 100037, China;2. Research Institute of Petroleum Exploration & Development, Beijing 100083, China

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  • An intensive analysis of the characteristics of main gas fields in central and northwest Sichuan basin such as the components and migration indicators of natural gas shows that natural gas of Xujiahe Formation in central Sichuan basin was mainly generated from source beds in the hydrocarbon generation sags,and the natural gas of T3x2, T3x4, T3x6 was respectively generated from hydrocarbon source rocks of T3x1, T3x3, T3x5. It is pointed out that even if the gas generation intensity of hydrocarbon source rocks in the hydrocarbon generation sag is lower than 20×108m3/km2,the reservoir which has good physical properties and beneficial tectonic background and is close to the hydrocarbon generation sag could also form a large or medium sized gas field.
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