Asymptotic analysis of resonance and attenuation of shear waves in acoustic logging

2003 ◽  
Author(s):  
Gui‐jin Yao ◽  
Ke‐xie Wang ◽  
Bao‐jun Yang ◽  
Hai‐rong Zhang
Keyword(s):  
Asymptotic Analysis ◽  
Shear Waves ◽  
Acoustic Logging

Asymptotic analysis for shear waves in a fluid-filled borehole

2007 ◽  
Vol 55 (4) ◽  
pp. 561-570 ◽  
Author(s):  
Gui-jin Yao ◽  
Ke-xie Wang ◽  
Jun Ma ◽  
Bao-jun Yang ◽  
Hai-rong Zhang
Keyword(s):  
Asymptotic Analysis ◽  
Shear Waves

3D FINITE DIFFERENCE SIMULATIONS OF ACOUSTIC LOGS IN TILTED LAYERED POROUS FORMATIONS

2012 ◽  
Vol 20 (02) ◽  
pp. 1240009 ◽  
Author(s):  
XIAO HE ◽  
XIUMING WANG ◽  
HAO CHEN
Keyword(s):  
Finite Difference ◽  
Coordinate System ◽  
Shear Waves ◽  
Acoustic Energy ◽  
Cylindrical Coordinate System ◽  
Acoustic Logging ◽  
Arrival Times ◽  
Poroelastic Media ◽  
Layered Formation ◽  
Cylindrical Coordinate

A finite-difference algorithm is developed in the 3D cylindrical coordinate system. Synthetic waveforms excited by monopole and dipole acoustic sources are calculated for acoustic logging in a tilted layered formation composed of two poroelastic media. It is revealed that the existence of a tilted layer drives more acoustic energy out and therefore reduces the reflection back to the wellbore. Numerical results show that the amplitudes and the arrival times of the shear waves and flexural modes are influenced by the borehole inclination. The Stoneley modes, however, show little sensitivity to the orientation of the layer interface.

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