Propagation of guided waves in a fluid layer bounded by two viscoelastic transversely isotropic solids

• Main Author: Ashour, Ahmed S
• Format: Article
• Language: English
• Published: Elsevier Science Publishers B.V., Amsterdam, Netherlands 2000
• Subjects: GE Environmental Sciences; Q Science (General)
• Online Access: http://irep.iium.edu.my/31405/1/Propagation_of_guided_waves.pdf; http://irep.iium.edu.my/31405/; http://dx.doi.org/10.1016/S0926-9851(00)00010-0

The analysis of Stoneley wave propagation in a fracture is essential for the identification and evaluation of fracture parameters from the borehole Stoneley wave. Also, it is important for many geophysics considerations, e.g. for tremor and long-period events observed in volcanoes and geothermal areas. In this paper, we investigate the guided waves propagation in a fluid layer lying between two viscoelastic vertically transversely isotropic media. The viscoelastic mechanism models the attenuation due to the presence of fluid saturation in the rock. A model based on the superposition of three inhomogeneous partial plane waves: one in the fluid and two heterogeneous waves in the solid is developed. The dispersion equation is obtained for this case. A numerical solution is carried out to obtain the guided wave velocity and attenuation coefficient. The results of this investigation show that there is a strong correlation between the velocity dispersion and attenuation of Stoneley wave and the anisotropic parameters of the medium especially in a sandstone fast. medium. q2000 Elsevier Science B.V. All rights reserved.