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Spangenberg & Kulenkampff 2006
Spangenberg, E. and Kulenkampff, J. (2006). Influence of methane hydrate content on electrical sediment properties. Geophysical Research Letters 33: doi: 10.1029/2006GL028188. issn: 0094-8276.

The electrical resistivity of an originally fully water saturated glass bead sample during the process of hydrate formation from methane dissolved in the pore water without a free gas phase was measured. In addition to the sample resistivity we measured the resistivity of the circulating water in order to determine the amount of water consumed by hydrate formation from the increase of salinity and to determine the formation resistivity factor and resistivity index. The resistivity of the sample increased from 5.1 Ωm at 100% water saturation to 265 Ωm at about 95% hydrate saturation whereas the water resistivity decreased from 1.39 Ωm to 1.08 Ωm. The observed dependence of the resistivity index versus water saturation cannot be described with the Archie-equation using a constant saturation exponent, but corresponds to what was predicted by a cubic sphere pack model.

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Abstract

Keywords
Exploration Geophysics, Downhole methods, Marine Geology and Geophysics, Gas and hydrate systems, Marine Geology and Geophysics, Marine sediments, processes and transport, Physical Properties of Rocks, Magnetic and electrical properties
Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/
Publisher
American Geophysical Union
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