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Snell’s Law

Snell’s Law. Northern Sh Shot-gather. Seismic Data. Southern P- Shot-gather. Seismic Data. At critical angle of incidence, angle of refraction = 90 degrees=angle of reflection. P`. critical angle. V 1 ,rho 1. P`P’. V 2 ,rho 2. Pre- and Post-critical Rays. x. z. V 1.

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Snell’s Law

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  1. Snell’s Law

  2. Northern Sh Shot-gather Seismic Data
  3. Southern P- Shot-gather Seismic Data
  4. At critical angle of incidence, angle of refraction = 90 degrees=angle of reflection P` critical angle V1,rho1 P`P’ V2,rho2
  5. Pre- and Post-critical Rays x z V1 Critical distance V2> V1 V2 Direct wave Pre-critical reflections Head wave Post-critical reflections
  6. One-layer Refracted Head Wave Xc =? Tc=? Critical distance=Xc x r1 z r3 r1 V1 r2 V2> V1 V2
  7. One-layer Refracted Head Wave Xc =? Tc=? Critical distance=Xc x r1 z r3 r1 V1 z0 r2 V2> V1 V2 (9)
  8. One-layer Refracted Head Wave Xc =? Tc=? Xc + Critical distance=Xc x r1 z r3 r1 V1 z0 r2 V2> V1 V2 (10)
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