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Article Navigation >  Acta Sedimentologica Sinica  > 2018  >  36(4): 818-828

LIU YaZhou, GANG WenZhe, CHEN Guo, SUN JingBo, JIANG Chong. Geochemical Characteristics of Aromatic Hydrocarbons of Chang7 Source Rocks from the Yanchi-Dingbian Area, Ordos Basin[J]. Acta Sedimentologica Sinica, 2018, 36(4): 818-828. doi: 10.14027/j.issn.1000-0550.2018.093
Citation: LIU YaZhou, GANG WenZhe, CHEN Guo, SUN JingBo, JIANG Chong. Geochemical Characteristics of Aromatic Hydrocarbons of Chang7 Source Rocks from the Yanchi-Dingbian Area, Ordos Basin[J]. Acta Sedimentologica Sinica, 2018, 36(4): 818-828. doi: 10.14027/j.issn.1000-0550.2018.093
shu

Geochemical Characteristics of Aromatic Hydrocarbons of Chang7 Source Rocks from the Yanchi-Dingbian Area, Ordos Basin

doi: 10.14027/j.issn.1000-0550.2018.093

  • College of Geosciences, China University of Petroleum, Beijing 102249, China

Funds:  Major Research Projects of Oil Pre Exploration Project Group in Northern Shaanxi Branch of PCOC, No. 2016-007
  • Received Date: 2017-10-18
  • Rev Recd Date: 2018-01-02
  • Publish Date: 2018-08-10
  • Based on the GC-MS analytical data of 16 samples of Chang7 source rocks from 13 wells in the Yanchi-Dingbian area, Ordos Basin, the geochemical characteristics of aromatic hydrocarbons of source rocks, the origins and sedimentary environments were investigated in detail, and the validity of maturity parameters of aromatic hydrocarbon biomarkers were discussed. It is shown that the source rocks in the study area are characterized by high abundance of bicyclic and tricyclic aromatic hydrocarbons, low abundance of tetracyclic and pentacyclic aromatic hydrocarbons, relatively high abundance of fluorene, relatively high abundance of 1,2,5-TMN and 1,2,5,6-TeMN in some samples, a certain content of terrigenous biomarkers such as retene, perylene, chrysene and pyrene. All these results indicated the source rocks of Chang7 Formation were mainly developed in slightly oxidizing-reducing shore-shallow lacustrine environment. Besides, the terrestrial higher plants input had certain contribution in the formation of source rocks. The maturity parameters of alkyl naphthalene, alkyl phenanthrene and alkyl dibenzothiophene from aromatic hydrocarbons suggested that the thermal evolution stage of source rocks reached the maturity stage. Although the equivalent vitrinite reflectance calculated by different series of aromatic compounds had some differences, it could qualitatively reflect the stage of thermal evolution of source rocks.
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  • Received:  2017-10-18
  • Revised:  2018-01-02
  • Published:  2018-08-10

Geochemical Characteristics of Aromatic Hydrocarbons of Chang7 Source Rocks from the Yanchi-Dingbian Area, Ordos Basin

doi: 10.14027/j.issn.1000-0550.2018.093
  • College of Geosciences, China University of Petroleum, Beijing 102249, China
Funds:  Major Research Projects of Oil Pre Exploration Project Group in Northern Shaanxi Branch of PCOC, No. 2016-007
  • Received Date: 2017-10-18
  • Rev Recd Date: 2018-01-02
  • Publish Date: 2018-08-10

Abstract: Based on the GC-MS analytical data of 16 samples of Chang7 source rocks from 13 wells in the Yanchi-Dingbian area, Ordos Basin, the geochemical characteristics of aromatic hydrocarbons of source rocks, the origins and sedimentary environments were investigated in detail, and the validity of maturity parameters of aromatic hydrocarbon biomarkers were discussed. It is shown that the source rocks in the study area are characterized by high abundance of bicyclic and tricyclic aromatic hydrocarbons, low abundance of tetracyclic and pentacyclic aromatic hydrocarbons, relatively high abundance of fluorene, relatively high abundance of 1,2,5-TMN and 1,2,5,6-TeMN in some samples, a certain content of terrigenous biomarkers such as retene, perylene, chrysene and pyrene. All these results indicated the source rocks of Chang7 Formation were mainly developed in slightly oxidizing-reducing shore-shallow lacustrine environment. Besides, the terrestrial higher plants input had certain contribution in the formation of source rocks. The maturity parameters of alkyl naphthalene, alkyl phenanthrene and alkyl dibenzothiophene from aromatic hydrocarbons suggested that the thermal evolution stage of source rocks reached the maturity stage. Although the equivalent vitrinite reflectance calculated by different series of aromatic compounds had some differences, it could qualitatively reflect the stage of thermal evolution of source rocks.

LIU YaZhou, GANG WenZhe, CHEN Guo, SUN JingBo, JIANG Chong. Geochemical Characteristics of Aromatic Hydrocarbons of Chang7 Source Rocks from the Yanchi-Dingbian Area, Ordos Basin[J]. Acta Sedimentologica Sinica, 2018, 36(4): 818-828. doi: 10.14027/j.issn.1000-0550.2018.093
Citation: LIU YaZhou, GANG WenZhe, CHEN Guo, SUN JingBo, JIANG Chong. Geochemical Characteristics of Aromatic Hydrocarbons of Chang7 Source Rocks from the Yanchi-Dingbian Area, Ordos Basin[J]. Acta Sedimentologica Sinica, 2018, 36(4): 818-828. doi: 10.14027/j.issn.1000-0550.2018.093
shu

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