1 Ocak 2021 Dergi makalesi Açık Erişim

Gundogar, Asli S.; Ross, Cynthia M.; Jew, Adam D.; Bargar, John R.; Kovscek, Anthony R.

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{
  "@context": "https://schema.org/", 
  "@id": 235250, 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "name": "Gundogar, Asli S."
    }, 
    {
      "@type": "Person", 
      "affiliation": "Stanford Univ, Energy Resources Engn, Stanford, CA 94305 USA", 
      "name": "Ross, Cynthia M."
    }, 
    {
      "@type": "Person", 
      "affiliation": "SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA", 
      "name": "Jew, Adam D."
    }, 
    {
      "@type": "Person", 
      "affiliation": "SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA", 
      "name": "Bargar, John R."
    }, 
    {
      "@type": "Person", 
      "affiliation": "Stanford Univ, Energy Resources Engn, Stanford, CA 94305 USA", 
      "name": "Kovscek, Anthony R."
    }
  ], 
  "datePublished": "2021-01-01", 
  "description": "The interaction of reactive fracture fluid with host shale and formation water plays an important role on fractured reservoir productivity. This study explores the prominent impacts of shale-fluid reactions on flow properties using representative core-flood experiments under confining stress. Alteration of shale is monitored using time-lapse X-ray computed tomography (CT), microCT (mu CT) of samples pre- and post-reaction, and scanning electron microscopy (SEM). The imaging approach is multiscale from nm's to cm's. The samples are clay-rich and partially fractured Marcellus outcrop and carbonate-rich MSEEL (Marcellus Shale Energy and Environmental Laboratory) downhole endmembers. Both samples have distinct microcracks for probing reactive transport in fractures communicating with matrices. A reduction in krypton-accessible CT porosity and liquid permeability was observed for both samples after fracture fluid exposure. Based on SEM-EDS surface analysis, an iron-bearing precipitate formed on and near fracture openings and in the shale matrix of the Marcellus outcrop indicating partial dissolution of pyrite and/or ferruginous dolomite followed by precipitation of iron (hydro)oxide. The compiled images reveal fracture filling with migrated and/or precipitated fine particles. Significant barite scale growth was detected on the reacted MSEEL surfaces together with halite and other (hydro)oxide precipitates resulting from geochemical reactions between the basin-specific injectants and shale minerals. The MSEEL sample experienced substantial calcite dissolution and a corresponding decrease in its bulk density and microcrack openings. Experimental results presented here indicate the significance of fracture fluid composition optimization based on intrinsic shale and resident brine chemistries.", 
  "headline": "Multiphysics Investigation of Geochemical Alterations in Marcellus Shale Using Reactive Core-Floods", 
  "identifier": 235250, 
  "image": "https://aperta.ulakbim.gov.tr/static/img/logo/aperta_logo_with_icon.svg", 
  "license": "http://www.opendefinition.org/licenses/cc-by", 
  "name": "Multiphysics Investigation of Geochemical Alterations in Marcellus Shale Using Reactive Core-Floods", 
  "url": "https://aperta.ulakbim.gov.tr/record/235250"
}