Premium
Influence of methane hydrate content on electrical sediment properties
Author(s) -
Spangenberg Erik,
Kulenkampff Johannes
Publication year - 2006
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2006gl028188
Subject(s) - electrical resistivity and conductivity , hydrate , saturation (graph theory) , clathrate hydrate , methane , mineralogy , materials science , water content , geology , chemistry , geotechnical engineering , physics , mathematics , organic chemistry , combinatorics , quantum mechanics
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.