Hydraulic and mechanical properties of natural fractures in low-permeability rock

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The results of a comprehensive laboratory study of the mechanical displacement, permeability, and void geometry of single rock fractures in a quartz monzonite are summarized and analyzed. A metal-injection technique was developed that provided quantitative data on the precise geometry of the void spaces between the fracture surfaces and the areas of contact at different stresses. At effective stresses of less than 20 MPa fluid flow was proportional to the mean fracture aperture raised to a power greater than 3. As stress was increased, contact area was increased and void spaces become interconnected by small tortuous channels that constitute the ... continued below

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Pages: 10

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Pyrack-Nolte, L.J.; Myer, L.R.; Cook, N.G.W. & Witherspoon, P.A. January 1, 1987.

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Description

The results of a comprehensive laboratory study of the mechanical displacement, permeability, and void geometry of single rock fractures in a quartz monzonite are summarized and analyzed. A metal-injection technique was developed that provided quantitative data on the precise geometry of the void spaces between the fracture surfaces and the areas of contact at different stresses. At effective stresses of less than 20 MPa fluid flow was proportional to the mean fracture aperture raised to a power greater than 3. As stress was increased, contact area was increased and void spaces become interconnected by small tortuous channels that constitute the principal impediment to fluid flow. At effective stresses higher than 20 MPa, the mean fracture aperture continued to diminish with increasing stress, but this had little effect on flow because the small tortuous flow channels deformed little with increasing stress.

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Pages: 10

Notes

NTIS, PC A02; 3.

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  • 6. International Society for Rock Mechanics congress, Montreal, Canada, 30 Aug 1987

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  • Other: DE87006147
  • Report No.: LBL-22718
  • Report No.: CONF-870815-2
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 6406367
  • Archival Resource Key: ark:/67531/metadc1212005

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1987

Added to The UNT Digital Library

  • July 5, 2018, 11:11 p.m.

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  • Oct. 29, 2018, 11:01 p.m.

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Pyrack-Nolte, L.J.; Myer, L.R.; Cook, N.G.W. & Witherspoon, P.A. Hydraulic and mechanical properties of natural fractures in low-permeability rock, article, January 1, 1987; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc1212005/: accessed November 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.