Stoneley-wave velocities for a fluid-solid interface

1956 ◽  
Vol 46 (4) ◽  
pp. 281-292
Author(s):  
E. Strick ◽  
A. S. Ginzbarg
Keyword(s):  
Stoneley Wave ◽  
Solid Interface ◽  
Wave Velocities

Stoneley-wave velocities for a solid-solid interface

1958 ◽  
Vol 48 (1) ◽  
pp. 51-63
Author(s):  
A. S. Ginzbarg ◽  
E. Strick
Keyword(s):  
Poisson Ratio ◽  
Density Ratio ◽  
Shear Velocity ◽  
Graphical Form ◽  
Stoneley Wave ◽  
Elastic Parameters ◽  
Solid Interface ◽  
Wave Velocities ◽  
Wide Range

Abstract Stoneley-wave velocities for a solid-solid interface were calculated for a wide range of elastic parameters. For density ratio ρ1/ρ2 < 1, the ratio of the Stoneley velocity to the shear velocity of the first medium VST/b1 is almost independent of the Poisson ratio σ1. Similarly for ρ1/ρ2 > 1 VST/b1 is almost independent of σ2. Results are given in graphical form: For ρ1/ρ2 < 1 and 0 ≦ σ1 ≦ 0.50, graphs of ρ1/ρ2 vs. VST/b1 are given for σ2 = 0.00, 0.10, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.48, and 0.50. For ρ1/ρ2 > 0 and 0 ≦ σ2 ≦ 0.50, graphs of ρ1/ρ2 vs. VST/b1 are given for σ1 = 0.00, 0.10, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.48, and 0.50.

Dispersive properties of a fluid layer overlying a semi-infinite elastic solid*

1954 ◽  
Vol 44 (3) ◽  
pp. 493-512
Author(s):  
Ivan Tolstoy
Keyword(s):  
Elastic Body ◽  
Group Velocity ◽  
Normal Mode ◽  
Fundamental Mode ◽  
Fluid Layer ◽  
Elastic Solid ◽  
Numerical Results ◽  
Stoneley Wave ◽  
Wave Velocities ◽  
Minimum Group

Abstract The dispersive properties of waves propagating in a system consisting of a fluid layer overlying a semi-infinite elastic body are investigated by means of new formulas for the group velocity. The distribution of stationary values of the group velocity is examined in the light of these formulas and of numerical results. Also it is shown that the minimum group velocity of the fundamental mode may belong either to the normal-mode branch or to the Stoneley-wave branch, depending on the contrast in wave velocities between the two media.

Vertical open fractures and shear‐wave velocities derived from VSPs, full waveform acoustic logs, and televiewer data

Geophysics ◽  
1993 ◽  
Vol 58 (6) ◽  
pp. 818-834 ◽  
Author(s):  
Frédéric Lefeuvre ◽  
Roger Turpening ◽  
Carol Caravana ◽  
Andrea Born ◽  
Laurence Nicoletis
Keyword(s):  
Shear Wave ◽  
Azimuthal Anisotropy ◽  
Stoneley Wave ◽  
Correlation Technique ◽  
Seismic Profiles ◽  
Vertical Seismic Profiles ◽  
Wave Velocities ◽  
Shear Wave Velocities ◽  
Full Waveform ◽  
Zero Offset

Fracture or stress‐related shear‐wave birefringence (or azimuthal anisotropy) from vertical seismic profiles (VSPs) is commonly observed today, but no attempt is made to fit the observations with observed in‐situ fractures and velocities. With data from a hard rock (limestones, dolomites, and anhydrites) region of Michigan, fast and slow shear‐wave velocities have been derived from a nine‐component zero offset VSP and compared to shear‐wave velocities from two full waveform acoustic logs. To represent the shear‐wave birefringence that affects the shear wave’s vertical propagation, a propagator matrix technique is used allowing a local measurement independent of the overburden layers. The picked times obtained by using a correlation technique have been corrected in the birefringent regions before we compute the fast and slow velocities. Although there are some differences between the three velocity sets, there is a good fit between the velocities from the shear‐wave VSP and those from the two logs. We suspect the formations showing birefringence to be vertically fractured. To support this, we examine the behavior of the Stoneley wave on the full waveform acoustic logs in the formations. In addition, we analyze the borehole televiewer data from a nearby well. There is a good fit between the fractures seen from the VSP data and those seen from the borehole.

A line source on a solid-solid interface—A study of the pseudo-Stoneley wave

1972 ◽  
Vol 62 (4) ◽  
pp. 1017-1027
Author(s):  
C. N. G. Dampney
Keyword(s):  
Closed Form ◽  
Line Source ◽  
Stoneley Wave ◽  
Elastic Media ◽  
Ray Theory ◽  
Interface Waves ◽  
Solid Interface ◽  
Direct Head ◽  
Fresh Insight ◽  
Insight Into

Abstract The displacement caused by a source on an interface between two solid semi-infinite elastic media presents an excellent study in interference between direct, head and interface waves. The solution herein derived provides fresh insight into the nature of pseudo-Stoneley interface waves. As well, the evolution of the head and direct waves is discerned as they move away from the interface. The technique used to solve the problem demonstrates the simplicity of using Sherwood's (1958) method with generalized ray theory. The displacement is simply expressed in a closed form which can be rapidly evaluated and is straightforward to interpret physically.

Mode theory as a framework for the investigation of the generation of a Stoneley wave at a liquid–solid interface

1994 ◽  
Vol 95 (4) ◽  
pp. 1953-1966 ◽  
Author(s):  
R. Briers ◽  
O. Leroy ◽  
G. N. Shkerdin ◽  
Yu. V. Gulyaev
Keyword(s):  
Stoneley Wave ◽  
Mode Theory ◽  
Solid Interface
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