Cristin-resultat-ID: 1779726
Sist endret: 5. februar 2020, 15:25
NVI-rapporteringsår: 2019
Resultat
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2019

Sorption of CO 2 and Integrity of a Caprock Shale.

Bidragsytere:
  • Nicolaine Agofack
  • Pierre Cerasi
  • Anna Magdalena Stroisz og
  • Stian Rørheim

Bok

Proceeding of 53th US Rock Mechanics / Geomechanics Symposium
ISBN:
  • 978-1-5108-9406-8

Utgiver

American Rock Mechanics Association (ARMA)
NVI-nivå 1

Om resultatet

Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Publiseringsår: 2019
Sider: 4043 - 4051
ISBN:
  • 978-1-5108-9406-8

Klassifisering

Fagfelt (NPI)

Fagfelt: Geovitenskap
- Fagområde: Realfag og teknologi

Beskrivelse Beskrivelse

Tittel

Sorption of CO 2 and Integrity of a Caprock Shale.

Sammendrag

CCS is a well-studied technology to efficiently reduce anthropogenic CO2 from the atmosphere, which is believed to be one of the main factors contributing to global warming. In this paper, we investigate possible changes in the mechanical properties of a shale caprock, when in contact with injected CO2. Through diffusion, and concentration gradient, the injected CO2 mixes with the caprock pore fluid, modifying its pH from basic to acid. Different experiments are performed to demonstrate the effect of CO2 on mechanical properties of the North Sea Draupne shale caprock. The sample was exposed to CO2-sat brine for about 20 days under a confining pressure of 20 MPa and a pore pressure of 10 MPa. The poroelastic properties such as Young's modulus, Poisson's ratio, bulk modulus as well as the strength were then measured. Even if a slight increase is observed on the strength, this early-age effect of CO2 on Draupne shale seems very little and is within the experimental error. The results of P-wave velocity measurements reveal a possibility that CO2 may be coming out of solution during the test. In order to address this possibility, the experimental conditions are being reviewed and continuous measurements (every minute) of Young's modulus and Poisson's ratio are performed on the sample from consolidation to failure, through the flowing of CO2-undersaturated brine.

Bidragsytere

Nicolaine Agofack

  • Tilknyttet:
    Forfatter
    ved Institutt for geovitenskap og petroleum ved Norges teknisk-naturvitenskapelige universitet

Pierre Cerasi

  • Tilknyttet:
    Forfatter
    ved Anvendt geovitenskap ved SINTEF AS

Anna Magdalena Stroisz

  • Tilknyttet:
    Forfatter
    ved Anvendt geovitenskap ved SINTEF AS

Stian Rørheim

  • Tilknyttet:
    Forfatter
    ved Institutt for geovitenskap og petroleum ved Norges teknisk-naturvitenskapelige universitet
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Resultatet er en del av Resultatet er en del av

Proceeding of 53th US Rock Mechanics / Geomechanics Symposium.

Smeallie, Peter. 2019, American Rock Mechanics Association (ARMA). USAVitenskapelig antologi/Konferanseserie
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