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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2013  >  35(3): 302-306
Li Hongbo. Compound specific carbon isotope composition of light hydrocarbons in crude oils from the north of the Northern Tarim Uplift[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2013, 35(3): 302-306. doi: 10.11781/sysydz201303302
Citation: Li Hongbo. Compound specific carbon isotope composition of light hydrocarbons in crude oils from the north of the Northern Tarim Uplift[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2013, 35(3): 302-306. doi: 10.11781/sysydz201303302
shu

Compound specific carbon isotope composition of light hydrocarbons in crude oils from the north of the Northern Tarim Uplift

doi: 10.11781/sysydz201303302
  • 1.

    State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China

  • 2. School of Earth Environment and Water Resources, Yangtze University, Wuhan, Hubei 430100, China

  • 3. Key Laboratory of Exploration Technologies for Oil and Gas Resources, Ministry of Education, Yangtze University, Wuhan, Hubei 430100, China

  • Received Date: 2012-09-25
  • Rev Recd Date: 2013-03-28
  • Publish Date: 2013-05-28
    Abstract
  • Compound specific carbon isotope compositions of different fractions and different original crude oils were analyzed to investigate light hydrocarbon characteristics of crude oils in the north of the Northern Tarim Uplift.Compound specific carbon isotope divergences of cyclopentane compounds in different crude oils were the least,which indicated that cyclopentanes had poor diagnosis in light hydrocarbons.A significant law can be found by compound specific carbon isotope compositions of optimized light hydrocarbons.Compound specific carbon isotope of light hydrocarbons in coal-formed oils from the Luntai Oilfield was the highest,ranging from -21‰ to -19‰.Lacustrine oils from the Dalaoba Oilfield took the second place,ranging from -25‰ to -21‰.Marine oils in the Yakela Oilfield were the lowest,ranging from -31.5‰ to -28‰.Compound specific carbon isotope composition of light hydrocarbons in crude oils which derived from Cambrian-Lower Ordovician in well YN2 was unique.It is suggested that compound specific carbon isotope composition of light hydrocarbons can be a diagnosis index for group crude oil,especially for gas-condensate and light oils.

     

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