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Transport in fractured porous solids
Author(s) -
Mattisson Charlotte,
Knackstedt Mark A.,
Senden Tim J.
Publication year - 1997
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/97gl00235
Subject(s) - porosity , permeability (electromagnetism) , electrical resistivity and conductivity , porous medium , materials science , matrix (chemical analysis) , geology , geotechnical engineering , mineralogy , composite material , physics , chemistry , biochemistry , quantum mechanics , membrane
Laboratory measurements are made of the permeability and the resistivity of sintered porous media with disordered fractures over a wide range of matrix porosity. We discuss the preparation and characterisation of the samples. Approximating the topology of a rough fracture by a single discrete fracture can introduce large errors in the prediction of the permeability. We test the validity of empirical expressions relating permeability, resistivity and porosity for fractured samples. Resistivity correlations with porosity are independent of the presence of fractures. In contrast, permeability correlations show a strong dependence. Attempts to decouple the permeability of the fractured sample as a parallel sum of matrix and fracture permeability leads to large errors. The results indicate that transport in a medium with two distinct families of pathways cannot be described by a single‐valued transport coefficient.