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February 14, 2026PLoS ONEOpen Access

Pore structure and fractal characteristics of deep shale gas reservoirs in the Western Chongqing block, Sichuan Basin

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Authors

FFFeifei FangSHSijie HeJZJie Zhang

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Overview

Investigates the pore structure and fractal characteristics of shale gas reservoirs, suggesting new insights into resource development.

Key Points

  • To investigate the geological characteristics and pore structures of deep shale gas reservoirs in the Western Chongqing Block.
  • Integrated scanning electron microscopy (SEM) and argon ion polishing-field emission scanning electron microscopy (AIP-FESEM) for pore structure analysis.
  • Applied high-pressure mercury intrusion (HPMI) and low-pressure gas adsorption (LPGA) techniques to evaluate pore characteristics.
  • Analyzed pore fractal characteristics using models like mercury saturation model, Frenkel-Halsey-Hill (FHH) model, and volume-surface area (V-S) model.
  • Identified various pore types: organic, intergranular, intragranular, intercrystalline, and interlayer fractures.
  • Micropores primarily contribute to total pore volume in three specific size ranges: 0.45-0.5 nm, 0.55-0.6 nm, and 0.8-0.85 nm.
  • Macropores demonstrate greater heterogeneity and complex structures compared to mesopores, highlighting a complex internal pore structure.

Cite This Study

Fang et al. (2026) studied this question.

synapsesocial.com/papers/6990113f2ccff479cfe57cachttps://doi.org/10.1371/journal.pone.0342662
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