Contaminant-induced mechanical damping in partially saturated Berea sandstone

Details Contaminant-induced mechanical damping in partially saturated Berea sandstone Contaminant-induced mechanical damping in partially saturated Berea sandstone

Aug 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29p..11b&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 16, pp. 11-1, CiteID 1764, DOI 10.1029/2002GL015455

Physics

Physical Properties Of Rocks: Wave Attenuation, Physical Properties Of Rocks: Instruments And Techniques, Hydrology: Unsaturated Zone

Scientific paper

We have measured mechanical damping in partially saturated Berea sandstone that is strongly dependent on the presence of a small amount of oil. This effect is observed as a function of water saturation and average strain amplitude. These observations are presented as evidence of a damping mechanism previously observed and characterized in artificial cracks. We conclude that this damping effect is due to surface chemistry changes in the rock, and infer that seismic attenuation can be used to monitor small changes in pore fluid chemistry under certain conditions.

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