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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2010  >  32(3): 276-281
Wang Licheng, Wang Chengshan, Wu Xinhe, Li Yalin, Wei Yushuai. EVALUATION OF JURASSIC-CRETACEOUS MARINE HYDROCARBON ROCKS IN THE BOLIN BASIN, SOUTHWESTERN TIBET[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2010, 32(3): 276-281. doi: 10.11781/sysydz201003276
Citation: Wang Licheng, Wang Chengshan, Wu Xinhe, Li Yalin, Wei Yushuai. EVALUATION OF JURASSIC-CRETACEOUS MARINE HYDROCARBON ROCKS IN THE BOLIN BASIN, SOUTHWESTERN TIBET[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2010, 32(3): 276-281. doi: 10.11781/sysydz201003276
shu

EVALUATION OF JURASSIC-CRETACEOUS MARINE HYDROCARBON ROCKS IN THE BOLIN BASIN, SOUTHWESTERN TIBET

doi: 10.11781/sysydz201003276
  • 1.

    School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China

  • 2. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China

  • 3. SINOPEC Exploration and Production Research Institute, Beijing 100083, China

  • 4. Tibet Institutes of Geological Survey, Lhasa 850000, China

  • Received Date: 2009-11-11
  • Rev Recd Date: 2010-03-29
  • Publish Date: 2010-06-28
    Abstract
  • The Bolin Basin,located on the southwestern margin of Tibetan Plateau,is a Mesozoic marine petroliferous basin covering an area of 30 000 km2.The basin has been received little hydrocarbon interest for its severe climate and life conditions,although it situates in the east of Tethyan realm,which is concentrated about 70% of the total world petroleum resources.Measured section and geochemical ana-lysis are combined to better understand the hydrocarbon potential.Two major source rock units have been identified: the Upper Jurassic Menkadun Formation and the Lower Cretaceous Gangba Group.Their potential source rock successions,mainly composed of dark shales during Oxfordian-Tithonian and Aptian,respectively,were deposited in outer shelf.TOC content ranges from 0.67 to 1.62 weight percent with an average value of about 1.03 weight percent for the Menkadun Formation and 0.7 to 1.08 weight percent with an average value of about 0.86 weight percent for the Gangba Group.All shale samples are composed of a mixed typeⅡ1(oil prone) kerogen.The vitrinite reflectance data and biomarker suggest that the Gangba Group is at late mature with respect to petroleum generation and the Menkadun Formation is overmature with respect to liquid hydrocarbon generation.These data indicate the shales of the units are good potential source rocks.Therefore,the good source rocks supply abundant matters for the formation of oil and gas in this area.

     

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