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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2012  >  34(6): 617-622
Xue Luo, Xu Sihuang, Yuan Caiping, Liu Xiaoxia, Li Songfeng. Evolution characteristics of methane stable carbon isotope in thermal simulation experiment:Discussion of δ13C1-Ro relationship under experimental and natural conditions[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2012, 34(6): 617-622. doi: 10.11781/sysydz201206617
Citation: Xue Luo, Xu Sihuang, Yuan Caiping, Liu Xiaoxia, Li Songfeng. Evolution characteristics of methane stable carbon isotope in thermal simulation experiment:Discussion of δ13C1-Ro relationship under experimental and natural conditions[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2012, 34(6): 617-622. doi: 10.11781/sysydz201206617
shu

Evolution characteristics of methane stable carbon isotope in thermal simulation experiment:Discussion of δ13C1-Ro relationship under experimental and natural conditions

doi: 10.11781/sysydz201206617

  • Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences, Wuhan, Hubei 430074, China

  • Received Date: 2012-06-11
  • Rev Recd Date: 2012-09-25
  • Publish Date: 2012-11-28
    Abstract
  • By means of thermal simulation experiment,5 mudstone samples from Palaeogene of the Zhu Ⅰ Depre-ssion have been tested.The studies of methane stable carbon isotope have shown that when Ro is below 1.2%-1.3%,methane stable carbon isotope decreases as Ro increases.When Ro is over 1.2%-1.3%,methane stable carbon isotope increases as Ro increases.The changing principle may be explained by the differences of activation energy between 13C methane(heavy methane)and 12C methane(light methane).Under experimental and natural conditions,the relationship between methane stable carbon isotope and Ro are different,which might be the results of "effects after hydrocarbon generation".Due to the effects,massive gas migration leads to the weaken-ing of carbon isotope fractionation.The studies may guide gas field exploration.Heavy methane carbon isotope indicates high-mature gas source rocks,large-scale migration and good prospects for gas exploration.

     

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