Fluid transport properties of rock fractures at high pressure and temperature. Progress report, July 1, 1978--June 30, 1979. [Lamont-Doherty Geological Observatory, July 1, 1978--June 30, 1979]
Accomplishments during the first 30 months of work on the fluid transport properties of rock fractures at high pressure are discussed in detail in this report and by Kranz et. al in Int. J. Rock Mech. Min. Sci. (1979). The following results are discussed in this report. Fracture permeability is highly sensitive to initial surface roughness. Changes in permeability are found to be proportional to (BdP/sub f/ - adP/sub c/), where b/a < 1. When absolute aperture is used to calculate permeability, permeability measured by the pulse decay is constant between confining pressures of 300 b and 3 kb; this suggests that the cross-sectional area of the joint aperture varies linearly with confining pressure. Increasing pore pressure forces joints open only when the effective pressure across the joint has been reduced to less than 500 b. Dissolution in chemically active fluids affects joint permeability. 9 figures.
- Research Organization:
- Columbia Univ., Palisades, NY (USA). Lamont-Doherty Geological Observatory
- DOE Contract Number:
- EY-76-S-02-4054
- OSTI ID:
- 6028715
- Report Number(s):
- COO-4054-3
- Country of Publication:
- United States
- Language:
- English
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Fluid transport properties of rock fractures at high pressure and temperature. Progress report, July 1, 1976--June 30, 1977
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