Physics
Scientific paper
Jan 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29a...5h&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 1, pp. 5-1, CiteID 1005, DOI 10.1029/2001GL013483
Physics
Physical Properties Of Rocks: Magnetic And Electrical Properties, Physical Properties Of Rocks: Permeability And Porosity, Hydrology: Unsaturated Zone, Mineral Physics: Surfaces And Interfaces
Scientific paper
We conducted a series of electrokinetic measurements on partially saturated sandstone samples. Both steady and transient electric signals were observed. We recorded transient electric signals with frequencies of 0.5-2Hz and amplitudes 10-100 times smaller than the quasi-DC streaming potential, which we associate with fluid flow instabilities in the unsaturated porous rocks samples. Some of these electric signals were correlated with fluid pressure variations, delayed by one to a few seconds.
Bernard Ph
Hovhannissian G. M.
Pozzi Jean Pierre
Tabbagh Alain
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