Lithologic Reservoirs ›› 2022, Vol. 34 ›› Issue (6): 92-100.doi: 10.12108/yxyqc.20220608

• PETROLEUM EXPLORATION • Previous Articles     Next Articles

Geochemical characteristics and hydrocarbon generation potential of Upper Paleozoic source rocks in Ganquan area，Ordos Basin

WEI Xin1,2, TANG Jianyun1,2,3,4, SONG Hongxia5, CHEN Yubao6   

  1. 1. Karamay Vocational and Technical College, Karamay 834000, Xinjiang, China;
    2. China University of Petroleum(Beijing)at Karamay, Karamay 834000, Xinjiang, China;
    3. Department of Geology/State Key Laboratory of Continental Dynamics, Northwest University, Xi' an 710069, China;
    4. Jiangxi Engineering Laboratory on Radioactive Geoscience and Big Data Technology, Nanchang 330013, China;
    5. Research Institute of Exploration and Development, PetroChina Tuha Oilfield Company, Hami 839009, Xinjiang, China;
    6. Yanchang Petroleum Co., Ltd., Yan' an 716005, Shaanxi, China
  • Received:2022-02-15 Revised:2022-05-24 Online:2022-11-01 Published:2022-11-09

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Abstract: A number of organic geochemical tests such as organic carbon content determination，rock pyrolysis analysis，kerogen maceral identification and vitrinite reflectance，were carried out on coal measure mudstone， carbonaceous mudstone and coal rock samples of Benxi Formation and Shanxi Formation of Upper Paleozoic source rocks in Ganquan area of Ordos Basin，and the hydrocarbon generation potential was evaluated. The results show that： （1）There are many sets of source rocks developed in Upper Paleozoic in Ganquan area， and the lithologies are mainly coal and dark mudstone.（2）The organic matter of Shanxi Formation has high abundance and it is a good source rock. In contrast，the organic matter abundance of Benxi Formation is low and relatively poor. In terms of organic matter types，the source rocks of Benxi Formation are mainly humic type Ⅲ， while the source rocks of Shanxi Formation are mostly humic type Ⅲ， followed by sapropel-humic type Ⅱ2.（3）The maturity of source rocks of Benxi Formation and Shanxi Formation has been in the stage of high maturity to over maturity. （4）The Upper Paleozoic source rocks are widely distributed in Ganquan area. The cumulative thickness of source rocks of Benxi Formation is 10-20 m，and the cumulative thickness of source rocks of Shanxi Formation ranges from 50 m to 80 m. As a whole， they are relatively high-quality source rocks with high hydrocarbon generation potential.

Key words: source rock, geochemical characteristics, hydrocarbon generation potential, Shanxi Formation, Benxi Formation, Upper Paleozoic, Ganquan area, Ordos Basin

CLC Number: 

  • TE122
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