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Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/73178

Type: Journal article
Title: Permeability correction factor for fractures with permeable walls
Author: Mohais, Rosemarie
Xu, Chaoshui
Dowd, Peter Alan
Hand, Martin Phillip
Citation: Geophysical Research Letters, 2012; 39(3):L03403
Publisher: American Geophysical Union
Issue Date: 2012
ISSN: 0094-8276
School/Discipline: School of Civil, Environmental and Mining Engineering
Statement of
Responsibility: 
R. Mohais, C. Xu, P. A. Dowd, and M. Hand
Abstract: Enhanced Geothermal Systems (EGS) are based on the premise that heat can be extracted from hot dry rocks located at significant depths by circulating fluid through fracture networks in the system. Heated fluid is recovered through production wells and the energy is extracted in a heat exchange chamber. There is much published research on flow through fractures, and many models have been developed to describe an effective permeability of a fracture or a fracture network. In these cases however, the walls of the fracture were modelled as being impermeable. In this paper, we have extended our previous work on fractures with permeable walls, and we introduce a correction factor to the equation that governs fracture permeability. The solution shows that the effective fracture permeability for fractures with permeable walls depends not only on the height of the channel, but also on the wall permeability and the wall Reynolds number of the fluid. We show that our solution reduces to the established solution when the fracture walls become impermeable. We also extend the discussion to cover the effective permeability of a system of fractures with permeable walls.
Rights: Copyright 2012 by the American Geophysical Union.
RMID: 0020116547
DOI: 10.1029/2011GL050519
Appears in Collections:Environment Institute Publications
Civil and Environmental Engineering Publications
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