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Research on the Shale Porosity–TOC Maturity Relationship Based on an Improved Pore Space Characterization Method

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  • Jianbin Zhao

    (College of Geophysics, China University of Petroleum, Beijing 102249, China
    China Petroleum Logging Co., Ltd., Xi’an 710000, China
    Key Laboratory of Well Logging of China Petroleum, Xi’an 710000, China)

  • Shizhen Ke

    (College of Geophysics, China University of Petroleum, Beijing 102249, China)

  • Weibiao Xie

    (School of Petroleum, China University of Petroleum, Karamay 834000, China)

  • Zhehao Zhang

    (China Petroleum Logging Co., Ltd., Xi’an 710000, China
    Key Laboratory of Well Logging of China Petroleum, Xi’an 710000, China)

  • Bo Wei

    (China Petroleum Logging Co., Ltd., Xi’an 710000, China
    Key Laboratory of Well Logging of China Petroleum, Xi’an 710000, China)

  • Jinbin Wan

    (China Petroleum Logging Co., Ltd., Xi’an 710000, China
    Key Laboratory of Well Logging of China Petroleum, Xi’an 710000, China)

  • Daojie Cheng

    (China Petroleum Logging Co., Ltd., Xi’an 710000, China
    Key Laboratory of Well Logging of China Petroleum, Xi’an 710000, China)

  • Zhenlin Li

    (China Petroleum Logging Co., Ltd., Xi’an 710000, China
    Key Laboratory of Well Logging of China Petroleum, Xi’an 710000, China)

  • Chaoqiang Fang

    (China Petroleum Logging Co., Ltd., Xi’an 710000, China
    Key Laboratory of Well Logging of China Petroleum, Xi’an 710000, China)

Abstract

Shale pore structure characterization is key to shale reservoir evaluation, sweet spot selection, and economic exploitation. It remains a challenge to accurately characterize shale micro-nano pores. Common experimental characterization methods for shale pore systems are listed, and advantages and weaknesses of each method are analyzed. An improved pore structure characterization method for shale is proposed by combining Helium and NMR. The new method does not affect shale samples and has a higher accuracy. The affecting factors for shale pore evolution for shale are also discussed, showing that organic matter content and maturity are key factors in total porosity development. Furthermore, a shale porosity–TOC maturity relationship chart is developed based on the experimental data of shale samples selected from six shale reservoirs. The application of this chart in Well X in the Gulong field of Songliao Basin proves its utility in evaluating shale reservoirs.

Suggested Citation

  • Jianbin Zhao & Shizhen Ke & Weibiao Xie & Zhehao Zhang & Bo Wei & Jinbin Wan & Daojie Cheng & Zhenlin Li & Chaoqiang Fang, 2024. "Research on the Shale Porosity–TOC Maturity Relationship Based on an Improved Pore Space Characterization Method," Energies, MDPI, vol. 17(5), pages 1-14, February.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:5:p:997-:d:1342479
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    References listed on IDEAS

    as
    1. Yujie Yuan & Reza Rezaee, 2019. "Comparative Porosity and Pore Structure Assessment in Shales: Measurement Techniques, Influencing Factors and Implications for Reservoir Characterization," Energies, MDPI, vol. 12(11), pages 1-14, May.
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