{
  "abstract": "We develop an integrated analytical framework for one-dimensional three-phase flow - involving rarefaction waves, shocks generated through the elliptic region and shock locus, as well as water and oil banks - for the analysis of oil recovery and CO2 storage. The solutions are compared with numerical approximations from a commercial reservoir simulator and an explicit finite difference code, showing good agreement between the approaches. Fractional flow solutions for three-phase immiscible and near-miscible injections were constructed semi-analytically. Relative-permeability inputs were carefully selected by fitting Corey-type curves to high-quality relative-permeability experimental data from the literature. The study was conducted under two wettability conditions: water-wet and non-water-wet. The results show that the displacement process, governed by relative permeability and viscosity, has a significant impact on oil recovery and CO2 storage design. The model used to represent the gas relative permeability has a significant impact on the results. In non-water-wet reservoirs, gas is no necessarily the most non-wetting phase in the presence of mobile water, leading to a much lower gas relative permeability than would be assumed using gas-oil data or oil-water analogues. Using a low gas relative permeability, consistent with recent measurements in the literature, leads to the formation of water or oil banks, which improve oil recovery. In addition, near-miscible injection results in a slower gas front and greater CO2 retention within the pore space. The findings of this study can be incorporated into reservoir management, field-development planning, and measurement, monitoring, and verification strategies for CO2 storage.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 2,
  "authors": [
    {
      "name": "Oranan Ariyarit"
    },
    {
      "name": "Martin J Blunt"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4fdv42hmby433.bib",
  "cited_by": 0,
  "doi": "10.31223/x5fz37",
  "fulltext_url": null,
  "id": "4fdv42hmby433",
  "issns": [],
  "landing_url": "https://eartharxiv.org/repository/view/15085/",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/legalcode",
  "metadata_licence": null,
  "native_subjects": [
    [
      "bepress",
      "CO2 injection"
    ],
    [
      "bepress",
      "CO2 storage"
    ],
    [
      "bepress",
      "Engineering"
    ],
    [
      "bepress",
      "Three-phase flow"
    ],
    [
      "bepress",
      "analytical solution"
    ],
    [
      "bepress",
      "enhanced oil recovery"
    ],
    [
      "bepress",
      "fractional flow"
    ],
    [
      "bepress",
      "near-miscible displacement"
    ],
    [
      "bepress",
      "relative permeability"
    ],
    [
      "openalex",
      "2212|Enhanced Oil Recovery Techniques"
    ]
  ],
  "openalex": "W7213643793",
  "pdf_url": "https://eartharxiv.org/repository/object/15085/download/26181/",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-19",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4fdv42hmby433.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:36Z",
      "native_id": "15085",
      "source": "eartharxiv",
      "url": "https://eartharxiv.org/repository/view/15085/"
    }
  ],
  "subjects": [
    {
      "field": "earth",
      "origin": "source:eartharxiv",
      "subfield": "general"
    }
  ],
  "title": "A One-Dimensional Framework for Three-Phase Flow in Immiscible and Near-Miscible CO2 Injection: Application to Enhanced Oil Recovery and CO2 Storage",
  "title_text": "A One-Dimensional Framework for Three-Phase Flow in Immiscible and Near-Miscible CO2 Injection: Application to Enhanced Oil Recovery and CO2 Storage",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:36Z",
  "url": "https://research.draconitic.com/paper/4fdv42hmby433",
  "venue": "EarthArXiv",
  "versions": []
}