+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

Effects of fluid viscosity on shear-wave attenuation in partially saturated sandstone

Effects of fluid viscosity on shear-wave attenuation in partially saturated sandstone

Geophysics 56(8): 1252-1258

Shear-wave attenuation and velocity have been measured in the kiloHertz frequency range at temperatures varying from -80 degrees C to 80 degrees C in a sample of Berea sandstone partially saturated with glycerol. I investigated 7 saturation states ranging from 0 to 62 percent of the pore space. Plots of attenuation versus temperature show squirt and viscous shear peaks, even at low saturation. Their amplitudes and half-widths increase with increasing saturation. The maxima of the peaks progressively move to higher temperatures (about 4 degrees C for viscous shear peak and 30 degrees C for squirt peak) with increasing saturation from 7 to 62 percent. The velocity dispersion between -80 degrees C and 80 degrees C progressively increases from 700 to 1200 m/s with increasing saturation from 7 to 62 percent.By introducing the crack saturation parameter, a simple viscoelastic model based on O'Connell and Budiansky and using a Cole-Cole distribution of cracks, is proposed for calculating the shear modulus in partially saturated rocks. This model partially interprets the experimental data.

(PDF emailed within 0-6 h: $19.90)

Accession: 018811722

Download citation: RISBibTeXText

DOI: 10.1190/1.1443145

Related references

Effects of fluid viscosity on shear-wave attenuation in saturated sandstones. Geophysics 55(6): 712-722, 1990

Shear wave attenuation in dry and saturated sandstone at seismic to ultrasonic frequencies. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts 30(7): 755-761, 1993

Measurements of seismic attenuation and transient fluid pressure in partially saturated Berea sandstone evidence of fluid flow on the mesoscopic scale. Geophysical Journal International 195(1): 342-351, 2013

Compressional and shear wave intrinsic attenuation and velocity in partially saturated soils. Soil Dynamics and Earthquake Engineering 51: 1-8, 2013

Elastic-wave attenuation in fluid-saturated Berea Sandstone. Geophysics 54(6): 785-788, 1989

Effect of subsurface hydrological properties on velocity and attenuation of compressional and shear wave in fluid-saturated viscoelastic porous media. Journal of Hydrology 460-461(none), 2012

P-wave seismic attenuation by slow-wave diffusion; numerical experiments in partially saturated rocks. Geophysics 72(4): N11-N21, 2007

Wave attenuation in partially saturated rocks. Geophysics 44(2): 161-178, 1979

Elastic wave attenuation in porous rocks; effects of pore fluid viscosity and frequency. SEG Annual Meeting Expanded Technical Program Abstracts with Biographies 72(Pages 1821-1824, 2002

Pore fluid viscosity effects on P- and S-wave anisotropy in synthetic silica-cemented sandstone with aligned fractures. Geophysical Prospecting 62(6): 1238-1252, 2014

Biot dispersion for P- and S-wave velocities in partially and fully saturated sandstone. Geophysical Prospecting 48(6): 1075-1089, 2000

Wave attenuation in partially saturated sandstones at acoustic frequencies. SEG Abstracts 1981(1): 103, 1981

Modulus defect, velocity dispersion and attenuation in partially-saturated reservoirs of Jurassic sandstone, Indus Basin, Pakistan. Studia Geophysica et Geodaetica 60(1): 112-129, 2016

Stress relaxation and attenuation of fluid-saturated sandstone at low frequency. Earthquake Science 8(4): 585-591, 1995

Velocity dispersion and fluid substitution in sandstone under partially saturated conditions. Applied Geophysics 15(2): 188-196, 2018