Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3723308l&link_type=abstract
Geophysical Research Letters, Volume 37, Issue 23, CiteID L23308
Physics
2
Physical Properties Of Rocks: Magnetic And Electrical Properties (0925), Hydrology: Rocks: Physical Properties, Hydrology: Instruments And Techniques: Monitoring, Mineralogy And Petrology: Mineral And Crystal Chemistry (1042), Mineral Physics: Surfaces And Interfaces
Scientific paper
We report measurements of the thermoelectric coupling coefficient in intact sandstone samples saturated with NaCl brine at concentrations ranging from 1 × 10-4 to 1 M. Our measurements account for temperature-dependent electrode effects. We also present a model for the salinity dependence of the thermoelectric coupling coefficient which yields a close match to the experimental data. At low salinity, the measured coupling coefficient exhibits the salinity dependence predicted for a perfect membrane, while at high salinity, the coupling coefficient follows that predicted for an uncharged porous medium. Measured values of the coupling coefficient range from 0.370 mVK-1 at low salinity (1 × 10-4 M), to 0.055 mVK-1 at high salinity (1 M).
Jackson David M.
Leinov E.
Vinogradov J.
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