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Chemometric Classification and Geochemistry of Crude Oils in the Eastern Fukang Sag, Junggar Basin, NW China

Author

Listed:
  • Erting Li

    (Research Institute of Experiment and Testing, Karamay 834000, China)

  • Yan Li

    (School of Energy Resources, China University of Geosciences, Beijing 100083, China
    Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism, Ministry of Education, China University of Geosciences, Beijing 100083, China)

  • Baoli Xiang

    (Research Institute of Experiment and Testing, Karamay 834000, China)

  • Dujie Hou

    (School of Energy Resources, China University of Geosciences, Beijing 100083, China
    Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism, Ministry of Education, China University of Geosciences, Beijing 100083, China)

  • Julei Mi

    (Research Institute of Experiment and Testing, Karamay 834000, China)

  • Xu Han

    (School of Energy Resources, China University of Geosciences, Beijing 100083, China
    Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism, Ministry of Education, China University of Geosciences, Beijing 100083, China)

  • Yu Zhang

    (Research Institute of Experiment and Testing, Karamay 834000, China)

  • Xiuwei Gao

    (Research Institute of Experiment and Testing, Karamay 834000, China)

Abstract

Thirty oil samples collected from the eastern Fukang Sag were analyzed geochemically for their biomarkers and carbon isotopic compositions. The chemometric methods of principal component analysis and hierarchical cluster analysis, employed to thirteen parameters indicating source and depositional environment, classified the oil samples into three genetically distinct oil families: Family A oils were mainly derived from lower aquatic organisms deposited in a weakly reducing condition of fresh–brackish water, Family B oils came from a source containing predominantly terrigenous higher-plant organic matter laid down in an oxidizing environment of fresh water, and Family C oils received sources from both terrigenous and marine organic matter deposited in a weakly oxidizing to oxidizing environment of brackish water. Indirect oil–source correlations implied that Family A oils were probably derived from Permian source rocks, Family B oils originated mainly from Jurassic source rocks, and Family C oils had a mixed source of Carboniferous and Permian. Biomarker maturity parameters revealed that all three families of oils were in the mature stage. However, Family A oils were relatively less mature than Family B and Family C oils.

Suggested Citation

  • Erting Li & Yan Li & Baoli Xiang & Dujie Hou & Julei Mi & Xu Han & Yu Zhang & Xiuwei Gao, 2022. "Chemometric Classification and Geochemistry of Crude Oils in the Eastern Fukang Sag, Junggar Basin, NW China," Energies, MDPI, vol. 15(23), pages 1-21, November.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:23:p:8921-:d:984140
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