1. With the development of modern well-logging techniques, direct shear wave logging has become an increasingly important tool in exploration and production geophysics .

2. Based on the shear wave formulation, this paper presents a new method to calculate horizontal seismic responses of multistory shear type structures.

3. The shear wave velocities of pavement systems decrease with depth, and their dispersion curves can be obtained by the stiffness matrix approach or the finite element method, etc.

4. Shear wave velocity is an important parameter in evaluation of dynamic properties of soil.

5. In shear wave splitting research using multicomponent VSP data, wave characteristic in surface layer and source behaviour influence greatly the anisotropy interpretation of objective interval.

6. It is the most effective approach to calculate the vertical and the horizontal auto-correlation distance by using the static cone penetration test curve and the shear wave velocity respectively.

7. The results show that the method can skip over the P-Wave and exactly pick the first S-Wave arrival in dipole shear wave log in slow formation.

8. Inversion results of field data indicate that OCCAM algorithm is characterized by good stability, high accuracy and strong resolution, and can automatically invert shear wave velocity and thickness.

9. Low-frequency pseudo Rayleigh wave (high velocity)can be used to estimate shear wave attenuation, then permeability in original state formation.

10. Pseudo-Rayleigh wave at low frequency (high velocity)can be used for the computation of shear wave attenuation in virgin zone.

11. Then the azimuth of formation fractures is estimated; and with the joint use of zero offset P wave source VSP data, fast and slow shear wave seismograms are obtained to have fracture density.

12. According to the variational principle for wave propagation, the elastic wave equation and the compressional and shear wave equations in a vertically inhomogeneous medium are developed.

13. At first(http:///shear wave.html), we introduced the wave propagation of porous materials and find that there could be two compression waves and one shear wave existing in porous materials.

14. At the balanceable place the incoming wave is inputted as shear wave in thethe mode.

15. With the use of reciprocal principle in seismic wave propagation, the algorithm may be used to compute the travel times of reflected compressional wave or converted shear wave.

16. The attenuation factor of longitudinal wave was changing linearly, whereas the attenuation factor of the slow shear wave kept nearly constant with a low frequency on the exploration seismic band.

17. By increasing the number of the elements, the amplitudes of compressional wave and shear wave are enhanced in the generation condition.

18. The numerical results clearly reflect the wave propagation process and the phenomena of shear wave splitting and wave-field differences caused by the azimuthal property variations.

19. Without disturbance of surface echo wave, defect wave is easily identified by using shear wave to detect lack of penetration in the root segment.

20. We studied gas and water discrimination problem in carbonate reservoir with dipole shear wave FMI log in northeastern Sichuan.

21. The results are as follows: First, it can reflect variation of thickness of covering layer and the duration of propagation time of the shear wave in overburden layer.

22. In addition, observation precision can be greatly improved by using spike pulse shear wave transducer with corrected polarization, and assisted testing methods.

23. The Rayleigh wave speed is very close to the shear wave speed.

24. AVO phenomenon relating to petrophysical parameters can be seen in both compressional wave and shear wave.