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Effects of Mineral Composition on Movable Fluid Porosity in Micro-Nanoscale Porous Media

Author

Listed:
  • Quanqi Dai

    (State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 102206, China
    Petroleum Exploration and Development Research Institute, SINOPEC, Beijing 102206, China)

  • Yangwen Zhu

    (State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 102206, China
    Petroleum Exploration and Development Research Institute, SINOPEC, Beijing 102206, China)

  • Yingfu He

    (State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 102206, China
    Petroleum Exploration and Development Research Institute, SINOPEC, Beijing 102206, China)

  • Rui Wang

    (State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 102206, China
    Petroleum Exploration and Development Research Institute, SINOPEC, Beijing 102206, China)

  • Da Zheng

    (Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China)

  • Yinbang Zhou

    (State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 102206, China
    Petroleum Exploration and Development Research Institute, SINOPEC, Beijing 102206, China)

  • Yunfeng Liu

    (State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 102206, China
    Petroleum Exploration and Development Research Institute, SINOPEC, Beijing 102206, China)

  • Guiwen Wang

    (College of Geosciences, China University of Petroleum—Beijing, Beijing 102249, China)

  • Hao Wu

    (School of Earth Sciences, Lanzhou University, Lanzhou 730000, China)

Abstract

In natural micro-nanoscale porous media, the movable fluid porosity can effectively represent storage and permeable properties, but various mineral compositions have complicated effects on it. Taking saline lacustrine shale as an example, this study researched the effects of mineral composition on movable fluid porosity, based on nuclear magnetic resonance (NMR), focused ion beam (FIB), and x-ray diffraction (XRD) experiments. The results show that movable fluid porosity exhibits a stronger dependence on porosity than movable fluid saturation does. Micropores (<100 nm) and macropores (>1000 nm) are mostly developed in silicate and gypsum minerals, and have a highly heterogeneous distribution. In contrast, carbonate intercrystalline pores are dominated by mesopores (100−1000 nm), and behave strongly heterogeneously. Many mesopores play a positive role in generating highly movable fluid porosity, but the development of micropores and macropores is not conducive to an increase in movable fluid porosity. Overall, a significant negative effect is observed between silicate mineral content and movable fluid porosity, and carbonate mineral content has a strong positive effect on movable fluid porosity, whereas movable fluid porosity exhibits a relatively small reduction with an increase in the gypsum.

Suggested Citation

  • Quanqi Dai & Yangwen Zhu & Yingfu He & Rui Wang & Da Zheng & Yinbang Zhou & Yunfeng Liu & Guiwen Wang & Hao Wu, 2023. "Effects of Mineral Composition on Movable Fluid Porosity in Micro-Nanoscale Porous Media," Energies, MDPI, vol. 16(13), pages 1-11, July.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:13:p:5166-:d:1187016
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