Advanced search
1 file | 5.32 MB Add to list

In situ triaxial testing to determine fracture permeability and aperture distribution for CO2 sequestration in Svalbard, Norway

Author
Organization
Abstract
On Svalbard, Arctic Norway, an unconventional silicidastic reservoir, relying on (micro)fractures for enhanced fluid flow in a low-permeable system, is investigated as a potential CO2 sequestration site. The fractures' properties at depth are, however, poorly understood. High resolution X-ray computed tomography (micro-CT) imaging allows one to visualize such geomaterials at reservoir conditions. We investigated reservoir samples from the De Geerdalen Formation on Svalbard to understand the influence of fracture closure on the reservoir fluid flow behavior. Small rock plugs were brought to reservoir conditions, while permeability was measured through them during micro-CT imaging. Local fracture apertures were quantified down to a few micrometers wide. The permeability measurements were complemented with fracture permeability simulations based on the obtained micro-CT images. The relationship between fracture permeability and the imposed confining pressure was determined and linked to the fracture apertures. The investigated fractures closed due to the increased confining pressure, with apertures reducing to approximately 40% of their original size as the confining pressure increased from 1 to 10 MPa. This coincides with a permeability drop of more than 90%. Despite their closure, fluid flow is still controlled by the fractures at pressure conditions similar to those at the proposed storage depth of 800-1000 m.
Keywords
RAY COMPUTED-TOMOGRAPHY, FLUID-FLOW, MICRO-CT, PORE-SCALE, RESERVOIR SANDSTONES, LAB, STORAGE, COAL, SEGMENTATION, VALIDITY

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 5.32 MB

Citation

Please use this url to cite or link to this publication:

MLA
Van Stappen, Jeroen, Redouane Meftah, Marijn Boone, et al. “In Situ Triaxial Testing to Determine Fracture Permeability and Aperture Distribution for CO2 Sequestration in Svalbard, Norway.” ENVIRONMENTAL SCIENCE & TECHNOLOGY 52.8 (2018): 4546–4554. Print.
APA
Van Stappen, J., Meftah, R., Boone, M., Bultreys, T., De Kock, T., Blykers, B., Senger, K., et al. (2018). In situ triaxial testing to determine fracture permeability and aperture distribution for CO2 sequestration in Svalbard, Norway. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 52(8), 4546–4554.
Chicago author-date
Van Stappen, Jeroen, Redouane Meftah, Marijn Boone, Tom Bultreys, Tim De Kock, Benjamin Blykers, Kim Senger, Snorre Olaussen, and Veerle Cnudde. 2018. “In Situ Triaxial Testing to Determine Fracture Permeability and Aperture Distribution for CO2 Sequestration in Svalbard, Norway.” Environmental Science & Technology 52 (8): 4546–4554.
Chicago author-date (all authors)
Van Stappen, Jeroen, Redouane Meftah, Marijn Boone, Tom Bultreys, Tim De Kock, Benjamin Blykers, Kim Senger, Snorre Olaussen, and Veerle Cnudde. 2018. “In Situ Triaxial Testing to Determine Fracture Permeability and Aperture Distribution for CO2 Sequestration in Svalbard, Norway.” Environmental Science & Technology 52 (8): 4546–4554.
Vancouver
1.
Van Stappen J, Meftah R, Boone M, Bultreys T, De Kock T, Blykers B, et al. In situ triaxial testing to determine fracture permeability and aperture distribution for CO2 sequestration in Svalbard, Norway. ENVIRONMENTAL SCIENCE & TECHNOLOGY. 2018;52(8):4546–54.
IEEE
[1]
J. Van Stappen et al., “In situ triaxial testing to determine fracture permeability and aperture distribution for CO2 sequestration in Svalbard, Norway,” ENVIRONMENTAL SCIENCE & TECHNOLOGY, vol. 52, no. 8, pp. 4546–4554, 2018.
@article{8559230,
  abstract     = {On Svalbard, Arctic Norway, an unconventional silicidastic reservoir, relying on (micro)fractures for enhanced fluid flow in a low-permeable system, is investigated as a potential CO2 sequestration site. The fractures' properties at depth are, however, poorly understood. High resolution X-ray computed tomography (micro-CT) imaging allows one to visualize such geomaterials at reservoir conditions. We investigated reservoir samples from the De Geerdalen Formation on Svalbard to understand the influence of fracture closure on the reservoir fluid flow behavior. Small rock plugs were brought to reservoir conditions, while permeability was measured through them during micro-CT imaging. Local fracture apertures were quantified down to a few micrometers wide. The permeability measurements were complemented with fracture permeability simulations based on the obtained micro-CT images. The relationship between fracture permeability and the imposed confining pressure was determined and linked to the fracture apertures. The investigated fractures closed due to the increased confining pressure, with apertures reducing to approximately 40% of their original size as the confining pressure increased from 1 to 10 MPa. This coincides with a permeability drop of more than 90%. Despite their closure, fluid flow is still controlled by the fractures at pressure conditions similar to those at the proposed storage depth of 800-1000 m.},
  author       = {Van Stappen, Jeroen and Meftah, Redouane and Boone, Marijn and Bultreys, Tom and De Kock, Tim and Blykers, Benjamin and Senger, Kim and Olaussen, Snorre and Cnudde, Veerle},
  issn         = {0013-936X},
  journal      = {ENVIRONMENTAL SCIENCE & TECHNOLOGY},
  keywords     = {RAY COMPUTED-TOMOGRAPHY,FLUID-FLOW,MICRO-CT,PORE-SCALE,RESERVOIR SANDSTONES,LAB,STORAGE,COAL,SEGMENTATION,VALIDITY},
  language     = {eng},
  number       = {8},
  pages        = {4546--4554},
  title        = {In situ triaxial testing to determine fracture permeability and aperture distribution for CO2 sequestration in Svalbard, Norway},
  url          = {http://dx.doi.org/10.1021/acs.est.8b00861},
  volume       = {52},
  year         = {2018},
}

Altmetric
View in Altmetric
Web of Science
Times cited: