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250725s2025 xx |||||o 00| ||eng c |
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|a 10.1111/gwat.70008
|2 doi
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|a pubmed25n1570.xml
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|a eng
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|a Li, Guangquan
|e verfasserin
|4 aut
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|a An Alternative Approach to Acquiring Permeability from Ultrasonic S-Wave
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|c 2025
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|a Text
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 16.09.2025
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|a Date Revised 16.09.2025
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2025 National Ground Water Association.
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|a Water interaction between fractures and rock matrix is one of the themes in hydrogeology. Accurate values of Darcy permeability (kD) of the matrix are desired for better quantification of the water interaction. In contrast to the traditional method using seepage experiments to measure kD of a rock, this study uses the technique of ultrasonic shear (S-) wave for determining kD of the rock matrix. From the perspective of waves, Darcy seepage is driven by slow compressional (P-) wave at very low frequencies, and kD is associated with slow P-wave in the regime of low frequency. Similarly, there is another permeability associated with S-wave, namely, S-wave permeability (ks). The rock samples are Navajo sandstone and Berea sandstone. Data of the dry sandstones with water are entered into Biot theory for yielding saturated phase velocity (Vs) and the quality factor due to viscous fluid (Qs). Then, ultrasonically measured Vs and Qs are fitted with the use of the model output. For Navajo sandstone, low-frequency ks appears to be 0.107-0.115 darcy, surprisingly close to kD of 0.1 darcy. For Berea sandstone, low-frequency ks turns out to be 0.081 darcy, also consistent with kD of 0.075 darcy. The success robustly shows that Biot theory is applicable to S-wave in isotropic rock free of fractures. More importantly, the comparability between low-frequency ks and kD demonstrates that ultrasonic S-wave is an alternative approach to acquiring kD of the matrix
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|a Journal Article
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|a Wang, Li
|e verfasserin
|4 aut
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1 |
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|a Liu, Zhongyuan
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Ground water
|d 1979
|g 63(2025), 5 vom: 24. Sept., Seite 704-712
|w (DE-627)NLM098182528
|x 1745-6584
|7 nnas
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| 773 |
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|g volume:63
|g year:2025
|g number:5
|g day:24
|g month:09
|g pages:704-712
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|u http://dx.doi.org/10.1111/gwat.70008
|3 Volltext
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|h 704-712
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