{
  "abstract": "CO2 flooding is essential for enhancing oil recovery in low-permeability reservoirs; however, the large viscosity contrast between CO2 and crude oil leads to severe gas channeling and low sweep efficiency. In this study, a binary composite system was constructed with a gas-soluble nonionic surfactant (OXO1312) as the foaming core and nano-SiO2 as the Pickering stabilizer. The solubility of the surfactants in scCO2 was evaluated at 60 °C and 20 MPa using a variable-volume apparatus, the foam performance was assessed by the Waring Blender method, and the foam morphology was observed by optical microscopy. The nonionic surfactants exhibited markedly higher scCO2 solubilities (>2 wt%) than the anionic surfactants (<1 wt%), following a clear carbon-chain-length window effect. OXO1312, combining high CO2-philicity with an appropriate EO number, was selected as the optimal foaming agent. The addition of 1.5 wt% nano-SiO2 increased the drainage half-life of the OXO1312 system by 84% through pronounced Pickering stabilization. The binary system remained stable below 50 °C under moderate salinity, whereas the half-life declined sharply above 70 °C. These findings provide a theoretical basis for the formulation design of CO2 foam flooding systems for CCUS-EOR.",
  "abstract_shown": true,
  "affiliations": [
    "Oil and Gas Technology Institute of PetroChina Changqing Oilfield Company, Xi’an 710018, China",
    "National Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields, Xi’an 710018, China",
    "College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, China"
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 6,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Jiuzheng Yu"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Xiao Qu"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Shichun Yu"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Yuqin Jia"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Ping Yi"
    },
    {
      "affs": [
        2
      ],
      "name": "Minglei Tian",
      "orcid": "0000-0003-4880-3139"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9k6651pkqh94y.bib",
  "cited_by": 0,
  "doi": "10.3390/molecules31203693",
  "fulltext_url": "https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13707895/?tool=EBI",
  "id": "9k6651pkqh94y",
  "issns": [
    "1420-3049"
  ],
  "landing_url": "https://www.mdpi.com/1420-3049/31/20/3693",
  "language": "eng",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2212|Enhanced Oil Recovery Techniques"
    ]
  ],
  "openalex": "W7222295835",
  "pdf_url": "https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13707895/pdf/?tool=EBI",
  "pmcid": "PMC13707895",
  "pmid": null,
  "published": "2026-10-01",
  "publisher": "MDPI AG",
  "ris": "https://research.draconitic.com/paper/9k6651pkqh94y.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:42Z",
      "native_id": "10.3390/molecules31203693",
      "source": "crossref",
      "url": "https://www.mdpi.com/1420-3049/31/20/3693"
    },
    {
      "first_seen": "2026-10-30T12:21:47Z",
      "native_id": "PMC:PMC13707895",
      "source": "europepmc",
      "url": "https://europepmc.org/article/PMC/PMC13707895"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "issn:1420-3049",
      "subfield": "general"
    }
  ],
  "title": "Study of Stabilization Mechanism of CO2 Foam Flooding System Using Gas-Soluble Nonionic Surfactant and Nano-SiO2",
  "title_text": "Study of Stabilization Mechanism of CO2 Foam Flooding System Using Gas-Soluble Nonionic Surfactant and Nano-SiO2",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:21:47Z",
  "url": "https://research.draconitic.com/paper/9k6651pkqh94y",
  "venue": "Molecules",
  "versions": []
}