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1IPGP - Institut de Physique du Globe de Paris (IPGP, 1 rue Jussieu, 75238 Paris cedex 05 ; Université Paris Diderot, Bât. Lamarck A case postale 7011, 75205 Paris CEDEX 13 - France)
Abstract : In most geological instances, 2-D or 3-D fracture distributions are not available from field data. We show here that when data relative to fractures are collected along a line such as a road or a well, estimations can be given to the major geometrical properties of the corresponding fracture networks, such as the volumetric density of fractures, their percolation character and their macroscopic permeability. All these formulae are analytical and can be split into two parts; the first one can be derived from the measured data, while the second one requires some assumption on the lateral extension of the fractures and on their permeability. All these techniques are applied to fractures located in the Baget watershed. They are also validated on a granite block whose structure is fully known. Extensions are proposed for networks with variable permeabilities and polydisperse fractures.
https://hal-insu.archives-ouvertes.fr/insu-03600286 Contributor : Nathalie POTHIERConnect in order to contact the contributor Submitted on : Monday, March 7, 2022 - 3:59:36 PM Last modification on : Monday, July 4, 2022 - 10:00:30 AM Long-term archiving on: : Wednesday, June 8, 2022 - 8:44:29 PM
S. Sisavath, V. Mourzenko, P. Genthon, J. -F. Thovert, P. M. Adler. Geometry, percolation and transport properties of fracture networks derived from line data. Geophysical Journal International, Oxford University Press (OUP), 2004, 157, pp.917-934. ⟨10.1111/j.1365-246X.2004.02185.x⟩. ⟨insu-03600286⟩