A simple and accurate model for attenuation and dispersion caused by squirt flow in isotropic porous rocks
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geo-2023-0049.1.pdf
Size
4.3 MB
Format
Adobe PDF
Checksum (MD5)
4f5c13a3b6b6b2107c8c5a08d969146c
Author(s)
Alkhimenkov, Yury
Quintal, Beatriz
Date Issued
December 4, 2023
Journal
Geophysics
Publisher
Society of Exploration Geophysicists
Citation
Yury Alkhimenkov, Beatriz Quintal; A simple and accurate model for attenuation and dispersion caused by squirt flow in isotropic porous rocks. Geophysics 2023;; 89 (1): MR1–MR10.
Version
Final published version
Abstract
Seismic waves propagating in fluid-saturated porous rocks exhibit attenuation and velocity dispersion in a broad range of frequencies. At sonic and ultrasonic frequencies, the attenuation is predominantly caused by fluid flow in cracks and grain contacts, so-called squirt flow. This physical mechanism for attenuation also may be relevant at seismic frequencies. We develop a simple and accurate analytical model for attenuation and dispersion caused by squirt flow in isotropic porous rocks. The input material properties for a specific rock model can be directly measured in a laboratory or calculated using analytical and numerical approaches. The results from our squirt flow model are compared with inherently accurate 3D numerical solutions for the same pore geometries. The analytical and numerical results are in good agreement. Furthermore, we observe that our analytical model is more accurate than the currently available analytical solution for squirt flow in isotropic porous rocks. MATLAB routines to reproduce the presented results are made available.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1190/geo2023-0049.1
