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Liquid Storage Characteristics of Nanoporous Particles in Shale: Rigorous Proof

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  • Jiangfeng Cui

    (School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266000, China)

  • Long Cheng

    (School of Geosciences, University of Science and Technology of China, Hefei 230026, China)

Abstract

Different from conventional reservoirs, a significant proportion of oil is in an adsorbed or even immobile state in shale and tight rocks. There are established comprehensive mathematical models quantifying the adsorbed, immobile, and free oil contents in shale rocks. However, the conclusions of the monotonicity of the complicated models from sensitivity analysis might not be universal, and rigorous mathematical derivation is needed to demonstrate their rationale. In this paper, the models for oil/water storage in the nanoporous grains in shale, i.e., kerogen and clay, are achieved based on the aforementioned storage models. Rigorous analytical derivations are employed to strictly prove the monotonicity of the immobile and adsorbed models, which is the main purpose of this work. This work expands the applicability of the storage models, is fundamental and important for mobility analysis in shale reservoirs, and can shed light on its efficient exploration and development.

Suggested Citation

  • Jiangfeng Cui & Long Cheng, 2019. "Liquid Storage Characteristics of Nanoporous Particles in Shale: Rigorous Proof," Energies, MDPI, vol. 12(20), pages 1-15, October.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:20:p:3985-:d:278348
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    References listed on IDEAS

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    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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    Keywords

    shale; storage; nanoporous; clay; kerogen;
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