{
  "abstract": "Efficient stimulation of coal reservoirs is crucial for enhancing coalbed methane (CBM) well productivity. As an emerging unconventional stimulation technology, low-frequency pulsating water injection (LF-PWI) has attracted widespread attention for its ability to transform the pore-fracture system of coal reservoirs and its potential for engineering application. In this study, LF-PWI experiments are conducted using NMR, CT, and a triaxial apparatus to investigate the influence of LF-PWI parameters on pore-fracture properties of coal samples. The dynamic gray relational analysis (DGRA) method is employed to quantitatively evaluate the correlations of pore-fracture properties with porosity and permeability, respectively. Finally, the stimulation mechanism of productivity is elucidated and validated through a case study. The results demonstrate that LF-PWI can reduce the coal elastic modulus by 35.15%. The volume and connectivity of micropores and mesopores fluctuate, while macropores with diameters of 200–300 μm increase significantly, forming dominant flow pathways (>500 μm). Permeability continuously increases due to macropore development (k/k0 = 4.07). Porosity initially shows a rapid rise driven by macropore expansion (φ/φ0 peaks near 1.05); it then declines (by up to 9.95%) and gradually recovers toward unity as the micropores vary. Increasing the pressure amplitude simultaneously enhances the deterioration of mechanical properties, the fluctuation of porosity, and the improvement of permeability. A segmented control strategy employing high–medium–high pressure amplitude can help balance the pore-fracture network, preserve the gas source, and expand gas seepage pathways. Field application in the DFZ-1 well confirmed that LF-PWI mitigates coal fines flowback and increases cumulative gas production by 17.07%. This study provides a theoretical basis for employing LF-PWI to improve CBM well productivity.",
  "abstract_shown": true,
  "affiliations": [
    "Anhui Provincial Bureau of Coal Geology , , ,",
    "Anhui Engineering and Technology Research Center for Unconventional Gas , ,",
    "China University of Mining and Technology , , , ,"
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 6,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Huijing Fang"
    },
    {
      "affs": [
        2
      ],
      "name": "Ang Xu",
      "orcid": "0009-0009-2284-6334"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Hai Ding"
    },
    {
      "affs": [
        2
      ],
      "name": "Xiaozhi Zhou"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Zhiyi Zhao"
    },
    {
      "affs": [
        2
      ],
      "name": "Xue Zhang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/fn6w6pz1dpk95.bib",
  "cited_by": 0,
  "doi": "10.1021/acsomega.6c08410",
  "fulltext_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC13737828/",
  "id": "fn6w6pz1dpk95",
  "issns": [
    "2470-1343"
  ],
  "landing_url": "https://pubs.acs.org/acsodf/article/doi/10.1021/acsomega.6c08410/5454865/Effect-of-Low-Frequency-Pulsating-Water-Injection",
  "language": "en",
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "heading",
      "Article"
    ],
    [
      "openalex",
      "2212|Coal Properties and Utilization"
    ]
  ],
  "openalex": "W7223131586",
  "pdf_url": "https://pubs.acs.org/doi/pdf/10.1021/acsomega.6c08410",
  "pmcid": "PMC13737828",
  "pmid": "42991526",
  "published": "2026-10-21",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/fn6w6pz1dpk95.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:39Z",
      "native_id": "10.1021/acsomega.6c08410",
      "source": "crossref",
      "url": "https://pubs.acs.org/acsodf/article/doi/10.1021/acsomega.6c08410/5454865/Effect-of-Low-Frequency-Pulsating-Water-Injection"
    },
    {
      "first_seen": "2026-11-09T12:22:56Z",
      "native_id": "PMC13737828",
      "source": "pmc",
      "url": "https://doi.org/10.1021/acsomega.6c08410"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "issn:2470-1343",
      "subfield": "general"
    }
  ],
  "title": "Effect of Low-Frequency Pulsating Water Injection Parameters on Coal Permeability: Quantitative Characterization Experiments and a Field Case Study",
  "title_text": "Effect of Low-Frequency Pulsating Water Injection Parameters on Coal Permeability: Quantitative Characterization Experiments and a Field Case Study",
  "type": "peer-reviewed",
  "updated_at": "2026-11-09T12:22:56Z",
  "url": "https://research.draconitic.com/paper/fn6w6pz1dpk95",
  "venue": "ACS Omega",
  "versions": []
}