Cristin-resultat-ID: 1820451
Sist endret: 29. januar 2021, 13:10
NVI-rapporteringsår: 2020
Resultat
Vitenskapelig artikkel
2020

Microfluidic Study of Fracture Dissolution in Carbonate-Rich Caprocks Subjected to CO2-Charged Brine

Bidragsytere:
  • Hossein Fazeli
  • Mohammad Nooraiepour og
  • Helge Hellevang

Tidsskrift

Industrial & Engineering Chemistry Research
ISSN 0888-5885
e-ISSN 1520-5045
NVI-nivå 2

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2020
Publisert online: 2019
Volum: 59
Hefte: 1
Sider: 450 - 457

Importkilder

Scopus-ID: 2-s2.0-85077171785

Beskrivelse Beskrivelse

Tittel

Microfluidic Study of Fracture Dissolution in Carbonate-Rich Caprocks Subjected to CO2-Charged Brine

Sammendrag

Investigating fracture evolutions triggered by chemical interactions in caprocks of CO2 storage sites is of great importance when caprock integrity is concerned. Mineral heterogeneity is one of the factors affecting fracture evolution. We present results from flow-through experiments deploying a unique high pressure geo-material microfluidic cell to monitor the fracture evolution of four carbonate-rich caprocks: (1) a homogeneous carbonate-rich sample, (2) a heterogeneous carbonate-rich sample, (3) a heterogeneous carbonate-rich shale sample, and (4) a heterogeneous carbonate-rich organic shale sample, representing different levels of mineral heterogeneity. The results show rather smooth fracture wall dissolution for the homogeneous rock sample. For the heterogeneous sample without shale, however, an altered layer is formed around the fracture that leads to an increase in the fracture roughness. Chemical analyses of effluent solutions demonstrate a decrease in the bulk dissolution rate of calcite over time at a constant flow rate. For the two carbonate-rich shale samples, visual observations using optical microscopy showed little changes in fracture dissolution, although analysis of effluent chemistry confirmed calcite dissolution.

Bidragsytere

Hossein Fazeli

  • Tilknyttet:
    Forfatter
    ved Institutt for geofag ved Universitetet i Oslo

Mohammad Nooraiepour

  • Tilknyttet:
    Forfatter
    ved Institutt for geofag ved Universitetet i Oslo

Helge Hellevang

  • Tilknyttet:
    Forfatter
    ved Institutt for geofag ved Universitetet i Oslo
  • Tilknyttet:
    Forfatter
    ved Avdeling for arktisk geologi ved Universitetssenteret på Svalbard
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