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ARTICLE

Characteristics of high frequency ultra-acoustic wave spectrum and pore size in low-permeability sandstone

WENHAO TIAN1 ,  YIXUAN WANG2 ,  TIANQI ZHOU3 ,  CONGJIAO XIE3 ,  ZHENLIANG GUAN2 ,  HONGPING LIU2 ,  KE XU4
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1 Key Laboratory of Petroleum Engineering Ministry of Education, China University of Petroleum, Beijing 102249, P.R. China.,
2 Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, P.R. China. Cxie2004@cug.edu.cn,
3 School of Earth and Space Science, Peking University, Beijing 100871, P.R. China.,
4 Jilin Oilfield Engineering Technology Service Corporation, Songyuan 138000, P.R. China.,
JSE 2017, 26(5), 399–410;
Submitted: 9 June 2025 | Revised: 9 June 2025 | Accepted: 9 June 2025 | Published: 9 June 2025
© 2025 by the Authors. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution -Noncommercial 4.0 International License (CC-by the license) ( https://creativecommons.org/licenses/by-nc/4.0/ )
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Abstract

Tian, W., Wang, Y., Zhou, T., Xie, C., Guan, Z., Liu, H. and Xu, K., 2017. Characteristics of high-frequency ultra-acoustic wave spectrum and pore size in low-permeability sandstone. Journal of Seismic Exploration, 26: 399-410. In the study of reservoir geophysics, elastic models of porous medium are commonly used in investigating reservoir geophysics of underground formations. In this work, we investigated the effect of pressure and pore size on acoustic frequency response in low-permeability sandstone. For a 0.5-3 ws pulse width and 725-4351 psi pressure, the dominant frequency and the bandwidth of the transmitted waves are sensitive to the median throat radius, which suggests that the dominant frequency and bandwidth of acoustic log data may depend on microporosity. To characterize the differences between transmitted and incident waves, we defined a new parameter, the spectrum ratio Q, which is the ratio of dominant frequency and bandwidth. Experimental results suggest that the relation between Q and the median throat radius, i.e., the Q-R function, is linear. The spectrum ratio Q also varies linearly with pressure. By establishing relationship between high-frequency ultra-acoustic wave spectra and pore size in low-permeability sandstone, our work suggests acoustic logging data can possibly be used to infer sandstone pore throat size for laboratory studies. Expanded laboratory studies are justified.

Keywords
high-frequency
ultra-acoustic
wave spectrum
pore size
median throat radius
low-permeability sandstone
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Journal of Seismic Exploration, Electronic ISSN: 0963-0651 Print ISSN: 0963-0651, Published by AccScience Publishing
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