Artículo
Characterization of fracture aperture field heterogeneity by electrical resistance measurement
Fecha de publicación:
04/2011
Editorial:
Elsevier Science
Revista:
Journal of Contaminant Hydrology
ISSN:
0169-7722
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We use electrical resistance measurements to characterize the aperture field in a rough fracture. This is done by performing displacement xperiments using two miscible fluids of different electrical resistivity and monitoring the time variation of the overall fracture resistance. Two fractures have been used: their complementary rough walls are identical but have different relative shear displacements which create “channel” or “barrier” structures in the aperture field, respectively parallel or perpendicular to the mean flow velocity →U. In the “channel” geometry, the resistance displays an initial linear variation followed by a tail part which reflects the velocity contrast between slow and fast flow channels. In the “barrier” geometry, a change in the slope between two linear zones suggests the existence of domains of different characteristic aperture along the fracture. These variations are well reproduced analytically and numerically using simple flow models. For each geometry, we present then a data inversion procedure that allows one to extract the key features of the heterogeneity from the resistance measurement.
Palabras clave:
APERTURE
,
CHANNELING
,
FRACTURES
,
HETEROGENEITY
,
RESISTANCE
,
ROUGHNESS
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Identificadores
Colecciones
Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Articulos de SEDE CENTRAL
Citación
Boschan, Alejandro; Ippolito, Irene Paula; Chertcoff, Ricardo Héctor; Hulin, J. P.; Auradou, H.; Characterization of fracture aperture field heterogeneity by electrical resistance measurement; Elsevier Science; Journal of Contaminant Hydrology; 123; 1-2; 4-2011; 65-74
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