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Geochemical Features of Lacustrine Shales in the Upper Cretaceous Qingshankou Formation of Changling Sag, Songliao Basin, Northeast China

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  • Zhongcheng Li

    (Research Institute of Exploration and Development, PetroChina Jilin Oilfield Company, Songyuan 138000, China
    College of Geosciences, China University of Petroleum-Beijng, Beijing 102249, China
    State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum-Beijng, Beijing 102249, China)

  • Zhidong Bao

    (College of Geosciences, China University of Petroleum-Beijng, Beijing 102249, China
    State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum-Beijng, Beijing 102249, China)

  • Zhaosheng Wei

    (Research Institute of Exploration and Development, PetroChina Jilin Oilfield Company, Songyuan 138000, China)

  • Lei Li

    (College of Geosciences, China University of Petroleum-Beijng, Beijing 102249, China
    State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum-Beijng, Beijing 102249, China)

  • Hailong Wang

    (Research Institute of Exploration and Development, PetroChina Jilin Oilfield Company, Songyuan 138000, China)

Abstract

The organic-rich shale of the Upper Cretaceous Qingshankou Formation is an important hydrocarbon source rock in Northeast China. In this study, taking the lacustrine shale in the Qingshankou Formation as an example, geochemical analysis, including total organic carbon (TOC), Rock-Eval pyrolysis, maceral compositions, X-ray diffraction (XRD), and biomarker analyses, were carried out on twenty-four shale samples to evaluate the geochemistry and environmental features of this shales. The Qingshankou lacustrine shales contains mainly Type I/II 1 organic matter and is oil prone, with a good to excellent source rock. Vitrinite reflectance and Rock-Eval pyrolysis parameters show that the Qingshankou lacustrine shales is mainly in the mature stage and within the oil window. Biomarker composition of the shales provide evidence that the Qingshankou lacustrine shales was formed in a reductive sedimentary environment with relatively high salinity water. The organic matter came from a mixture of plankton, bacterial and land plants.

Suggested Citation

  • Zhongcheng Li & Zhidong Bao & Zhaosheng Wei & Lei Li & Hailong Wang, 2022. "Geochemical Features of Lacustrine Shales in the Upper Cretaceous Qingshankou Formation of Changling Sag, Songliao Basin, Northeast China," Energies, MDPI, vol. 15(19), pages 1-15, September.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:19:p:6983-:d:923235
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    References listed on IDEAS

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    1. Yueyue Bai & Zhaojun Liu & Simon C. George & Jingyao Meng, 2022. "A Comparative Study of Different Quality Oil Shales Developed in the Middle Jurassic Shimengou Formation, Yuqia Area, Northern Qaidam Basin, China," Energies, MDPI, vol. 15(3), pages 1-23, February.
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    Cited by:

    1. Zonglin Li & Hong Li & Wenhou Li & Jiaopeng Sun & Keyong Li, 2023. "Organic Geochemical Features of the Upper Paleozoic Coal-Bearing Deposits in Ordos Basin, North-Central China," Energies, MDPI, vol. 16(5), pages 1-15, February.
    2. Zhongcheng Li & Zhidong Bao & Hailong Wang & Xiaohua Zhu & Hongxue Wang & Zhenchang Jiang & Taohua He, 2023. "Nano-Scale Pore Structure Characterization and Its Controlling Factors in Wufeng and Longmaxi Shale in the Zigong Area, Southwest Sichuan Basin," Energies, MDPI, vol. 16(21), pages 1-17, October.

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