scholarly journals Determination of transient acoustic wave fields in continuously layered media using the modified Cagniard method

1991 ◽  
Vol 89 (4B) ◽  
pp. 1972-1972
Author(s):  
Martin D. Verweij ◽  
Adrianus T. de Hoop
Keyword(s):  
Acoustic Wave ◽  
Layered Media ◽  
Wave Fields

Determination of the coherent condition for the scattering of an acoustic wave with an arbitrarily shaped wavefront by a curved area

Geophysics ◽  
1988 ◽  
Vol 53 (1) ◽  
pp. 131-134
Author(s):  
M. A. Ewaida
Keyword(s):  
Acoustic Wave ◽  
Physical Properties ◽  
Wave Scattering ◽  
Layered Media ◽  
Seismic Prospecting ◽  
Extended Surfaces ◽  
Coherent Condition

The investigation of wave scattering has become one of the most important and urgent problems of seismology and seismic prospecting. Layered media, the traditional objects of seismic investigations, have physical properties which slowly change across certain smooth and extended surfaces.

Angle-Domain Gathers Computation Using Poynting Vector of Two-Way Acoustic Wave Equation

2014 ◽  
Vol 962-965 ◽  
pp. 2984-2987
Author(s):  
Jia Jia Yang ◽  
Bing Shou He ◽  
Ting Chen
Keyword(s):  
Wave Equation ◽  
Acoustic Wave ◽  
Real Data ◽  
Flow Density ◽  
Acoustic Wave Equation ◽  
Reverse Time ◽  
Reverse Time Migration ◽  
Wave Fields ◽  
Time Migration ◽  
Source Wave

Based on two-way acoustic wave equation, we present a method for computing angle-domain common-image gathers for reverse time migration. The method calculates the propagation direction of source wave-fields and receiver wave-fields according to expression of energy flow density vectors (Poynting vectors) of acoustic wave equation in space-time domain to obtain the reflection angle, then apply the normalized cross-correlation imaging condition to achieve the angle-domain common-image gathers. The angle gathers obtained can be used for migration velocity analysis, AVA analysis and so on. Numerical examples and real data examples demonstrate the effectiveness of this method.

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