Salinity Dependence of the Thermoelectric Coupling Coefficient in Brine-Saturated Sandstones

E. Leinov, J. Vinogradov, M.D. Jackson

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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 (1M).
Original languageEnglish
Article numberL23308
Pages (from-to)1-6
Number of pages6
JournalGeophysical Research Letters
Issue number23
Publication statusPublished - 1 Dec 2010


ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

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