1 Ocak 2021 Dergi makalesi Açık Erişim

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

Citation Style Language JSON

{
  "DOI": "10.1021/acs.energyfuels.1c00588", 
  "abstract": "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.", 
  "author": [
    {
      "family": "Gundogar", 
      "given": " Asli S."
    }, 
    {
      "family": "Ross", 
      "given": " Cynthia M."
    }, 
    {
      "family": "Jew", 
      "given": " Adam D."
    }, 
    {
      "family": "Bargar", 
      "given": " John R."
    }, 
    {
      "family": "Kovscek", 
      "given": " Anthony R."
    }
  ], 
  "container_title": "ENERGY & FUELS", 
  "id": "235250", 
  "issue": "13", 
  "issued": {
    "date-parts": [
      [
        2021, 
        1, 
        1
      ]
    ]
  }, 
  "page": "10733-10745", 
  "title": "Multiphysics Investigation of Geochemical Alterations in Marcellus Shale Using Reactive Core-Floods", 
  "type": "article-journal", 
  "volume": "35"
}