Physics
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29i..14r&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 9, pp. 14-1, CiteID 1300, DOI 10.1029/2001GL013480
Physics
3
Physical Properties Of Rocks: Permeability And Porosity, Physical Properties Of Rocks: Transport Properties, Physical Properties Of Rocks: Magnetic And Electrical Properties, Hydrology: Groundwater Transport
Scientific paper
Electroosmotic flow represents the flow of pore water through a porous medium submitted to an electrical field or an electrical current density. A model is developed to describe the coupled electric/hydraulic flow problem in silty shales. The strength of electroosmotic flow is modeled here as a function of porosity, grain shape, pH, and ionic strength of the pore water. In the case of forced flow under a pore fluid pressure gradient, electroosmosis reduces the filtration velocity. This effect can be modeled by introducing an effective or apparent permeability into the classical form of the Darcy equation. This apparent permeability can be much smaller than the intrinsic permeability and becomes very sensitive to the salinity of the pore water.
Pessel Marc
Revil André
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