An experimental study of modulus dispersion and attenuation in sandstones at seismic frequencies

Vassily Mikhaltsevitch; Maxim Lebedev; Boris Gurevich

doi:10.1071/ASEG2013ab099

ISSN: 2202-0586
E-ISSN:

oa An experimental study of modulus dispersion and attenuation in sandstones at seismic frequencies
Authors Vassily Mikhaltsevitch^a, Maxim Lebedev^b and Boris Gurevich^c
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^a Curtin University, GPO Box U 1987 Perth, , WA, 6845, [email protected] ^b Curtin University, GPO Box U 1987 Perth, , WA, 6845, [email protected] ^c Curtin University, CSIRO, GPO Box U 1987 Perth, , WA, 6845, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2013, Issue ASEG2013 - 23rd Geophysical Conference, Dec 2013, p. 1 - 4
DOI: https://doi.org/10.1071/ASEG2013ab099
- Published online: 01 Dec 2013

Abstract

A study of the low frequency dispersion and attenuation in sedimentary rocks is important for interpreting seismic data obtained during fluid extraction in producing fields or during injection of carbon dioxide for storage purposes. We present the results of the laboratory measurements of elastic and anelastic parameters of dry and distilled water/brine saturated sandstones with low (~7.8 and 9.6 mD) and high (~590 mD) permeability conducted at seismic (1-100 Hz) and teleseismic (0.1-1 Hz) frequencies. The experiments were performed with a laboratory apparatus utilizing stress-strain relationship which was developed to measure the complex Young’s moduli of rocks at seismic frequencies. The measurements carried out in saturated sandstones with low permeability at effective pressures from 2.5 to 23 MPa revealed prominent peaks of attenuation in the seismic and teleseismic bands. A significant dispersion of the Young’s moduli was also observed. The change in the salinity of the fluid from 0 to 45,000 ppm NaCl did not affect any of the measured parameters. The dispersion of the elastic moduli of the dry sandstones was within the accuracy of our measurements.

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References

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/content/journals/10.1071/ASEG2013ab099

Article Type: Research Article

Keyword(s): elastic properties; extensional attenuation; seismic frequencies; water saturated sandstone

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oa An experimental study of modulus dispersion and attenuation in sandstones at seismic frequencies

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