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In Situ Soil Moisture Sensors in Undisturbed Soils
Published on: November 18, 2022
Contrasting behavior between dispersive seismic velocity and attenuation: advantages in subsoil characterization
Alimzhan Zhubayev1, Ranajit Ghose
1Department of Geotechnology, Delft University of Technology, Stevinweg 1, 2628 CN Delft, The Netherlands. a.zhubayev@tudelft.nl
The Journal of the Acoustical Society of America
|February 23, 2012
Summary
This study introduces a novel method to simultaneously estimate soil porosity and permeability by analyzing seismic wave behavior. This approach leverages the contrasting seismic velocity dispersion and attenuation in water-saturated sediments.
Area of Science:
- Geophysics
- Earth Sciences
- Seismology
Background:
- Poroelasticity models describe wave propagation in fluid-saturated porous media.
- Seismic wave velocity and attenuation exhibit complex behaviors related to material properties.
- Existing methods often struggle to uniquely determine both porosity and permeability simultaneously.
Purpose of the Study:
- To develop a novel approach for the simultaneous estimation of porosity and permeability.
- To utilize the contrasting seismic responses of porosity and permeability in water-saturated sediments.
- To validate the proposed method through numerical simulations.
Main Methods:
- Analysis of seismic P-wave and S-wave velocity dispersion and attenuation.
- Exploitation of the orthogonal relationship between porosity and permeability in the low-frequency seismic band (20-200 Hz).
- Numerical testing to assess the impact of data characteristics and wave types on estimation accuracy.
Main Results:
- Demonstrated a unique estimation of porosity and permeability by combining P-wave and S-wave data.
- Showcased the contrasting behavior of seismic velocity dispersion and attenuation in the porosity-permeability domain.
- Quantified the influence of maximum frequency content on the accuracy and robustness of the estimates.
Conclusions:
- The proposed method enables simultaneous and unique determination of porosity and permeability.
- Integration of P and S wave data enhances the reliability of seismic-based geomechanical property estimation.
- This technique offers a promising tool for subsurface characterization in geosciences.
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