Origin of CO2 gas from the north depression of the middle fault zone in the Hailar-Tamtsag Basin and natural gas in nearby depressions |
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| Authors: | Tonglei Zhang Jianfa Chen Defeng Zhu Chen Zhang |
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| Institution: | 1. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing, 102249, China
2. Exploration and Development Research Institute, PetroChina Daqing Oilfield Company Limited, Daqing, 163712, China
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| Abstract: | Natural gas pools with the high contents of CO2 were discovered during exploring the middle fault zone of the Hailar-Tamtsag Basin. So far this kind of gas reservoir with
CO2 with characteristics of carbon isotope is special. The stable carbon isotope of CO2 in the study area is relatively light with δ13
CCO2 C_{CO_2 } values ranging from −13.1‰ to −8.2‰. The 40Ar/36Ar values of associated argon gas range from 916 to 996, with R/Ra of 1.20–1.26. Based on comprehensive analysis, it is believed
that the CO2 gas in this study area is of crust mantle source. |
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| Keywords: | Hailar-Tamtsag Basin middle fault zone CO2 gas origin |
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