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Reflection Seismology

Reflection Seismology. Common Mid-point Coordinates. g. m. s. h. m= (s+g)/2. h= (s-g)/2. h. h. z. Reflection Coefficents. Rock-rock interface v1=2500 m/s v2=3000 m/s. R= 0.2. Sea-bottom Water-rock interface. V1=1500 m/s v2=2500 m/s. D1=1000 D2=2600. R= 0.7. Free Surface R= -1.0.

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Reflection Seismology

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  1. Reflection Seismology

  2. Common Mid-point Coordinates g m s h m= (s+g)/2 h= (s-g)/2

  3. h h z

  4. Reflection Coefficents Rock-rock interface v1=2500 m/s v2=3000 m/s R= 0.2 Sea-bottom Water-rock interface V1=1500 m/s v2=2500 m/s D1=1000 D2=2600 R= 0.7 Free Surface R= -1.0

  5. A= -0.49 A= 0.2 Multiples Multiple Primary

  6. Multiple layers - RMS velocity

  7. Constant velocity approx x Snell’s Law

  8. Dix’s Formula – RMS to true velcoity RMS velocity definition

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