Study on acoustic velocity dispersion of carbonate rock and extrapolation of the velocity

At present, a series of petrophysical experimental studies have been carried out on the velocity dispersion and attenuation caused by wave induced fluid flow. So as many valuable theoretical models have been proposed or developed. But these studies fail to reflect the influence of different pore str...

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Bibliographic Details
Published in:Acta geophysica 2023, Vol.71 (2), p.723-733
Main Authors: Duan, Xi, Zheng, Haoyue, Liu, Xiangjun, Liang, Lixi, Xiong, Jian
Format: Article
Language:English
Subjects:
Acoustic attenuation
Acoustic propagation
Acoustic velocity
Acoustic waves
Acoustics
Attenuation coefficients
Carbonate rocks
Carbonates
Computed tomography
Digital imaging
Dispersion
Earth and Environmental Science
Earth Sciences
Extrapolation
Finite difference method
Fluid dynamics
Fluid flow
Geophysics/Geodesy
Geotechnical Engineering & Applied Earth Sciences
Heterogeneity
Image processing
Mathematical models
Numerical simulations
Research Article - Applied Geophysics
Reservoirs
Structural Geology
Velocity
Wave attenuation
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Summary:At present, a series of petrophysical experimental studies have been carried out on the velocity dispersion and attenuation caused by wave induced fluid flow. So as many valuable theoretical models have been proposed or developed. But these studies fail to reflect the influence of different pore structure types on velocity dispersion and attenuation. Carbonate rocks have complex pore structure and strong heterogeneity. The study of the influence of pore structure on acoustic propagation characteristics at different frequencies is of great significance for further refinement of reservoir prediction. Through computed tomography scan and digital image processing, the pore structure distribution of longitudinal section of carbonate rock is obtained. On this basis, the finite difference numerical simulation of acoustic wave field is carried out, and the variation law of acoustic velocity with frequency and the relationship between acoustic velocity dispersion and attenuation coefficient are analyzed. The acoustic velocity extrapolation model based on frequency dispersion is established and compared with the experimental results to verify the effectiveness. The research results provide a theoretical basis for the prediction of carbonate reservoir parameters.
ISSN:1895-7455
1895-6572
1895-7455
DOI:10.1007/s11600-022-00947-9