Cristin-resultat-ID: 1633143
Sist endret: 21. november 2018, 10:51
NVI-rapporteringsår: 2018
Resultat
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2018

Stress-dependent fracture permeability in core samples: an experimental and numerical study

Bidragsytere:
  • Tore Ingvald Bjørnarå
  • Elin Skurtveit og
  • Guillaume Sauvin

Bok

52nd US Rock Mechanics / Geomechanics Symposium, 17-20 June 2018, Seattle, Washington
ISBN:
  • 978-0-9794975-3-7

Utgiver

American Rock Mechanics Association (ARMA)
NVI-nivå 1

Om resultatet

Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Publiseringsår: 2018
ISBN:
  • 978-0-9794975-3-7

Klassifisering

Fagfelt (NPI)

Fagfelt: Geofag
- Fagområde: Realfag og teknologi

Beskrivelse Beskrivelse

Tittel

Stress-dependent fracture permeability in core samples: an experimental and numerical study

Sammendrag

Within low-permeable rock mass, fractures can provide the essential porosity and permeability. Being a weak feature in a rock, fractures are sensitive to stress changes and the stress dependency on the fracture permeability in rocks is important to know. A natural fracture in a rock sample (siltstone) was analyzed in several flow-experiments at various effective stresses. A numerical model of the experiment was fitted to the obtained experimental results by a numerical inversion of the initial mechanical aperture and contact ratio of the fracture. Once the fracture stiffness, initial and stress-free effective fracture aperture and contact ratio are estimated, the stress dependency for the fracture permeability can be obtained. A good approximation of the first two parameters (stiffness and aperture) could be derived from experimental strain measurements, at various effective stresses, leaving the contact ratio, which generally ranges between zero and 0.5, as the remaining parameter to estimate.

Bidragsytere

Tore Ingvald Bjørnarå

  • Tilknyttet:
    Forfatter
    ved Analyse og modellering ved Norges Geotekniske Institutt

Elin Skurtveit

  • Tilknyttet:
    Forfatter
    ved Integrerte geofag ved Norges Geotekniske Institutt

Guillaume Sauvin

  • Tilknyttet:
    Forfatter
    ved Integrerte geofag ved Norges Geotekniske Institutt
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52nd US Rock Mechanics / Geomechanics Symposium, 17-20 June 2018, Seattle, Washington.

ARMA, 2018. 2018, American Rock Mechanics Association (ARMA). Vitenskapelig antologi/Konferanseserie
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