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Deconvolutio
n
Ahmed El_Sayed Hamza
4th level Geophysics
Geology Department_SCU
*A step in seismic signal processing to recover high
frequencies, attenuate multiples, equalize amplitudes,
produce a zero-phase wavelet or for other purposes
that generally affect the wave shape.
*Objective:
1-Increase the vertical resolution of the data.
2-Increasing the vertical resolution of the data increase
our ability to see subsurface layers.
3-Attenuate periodic multiple energy
Before
Deconvolution
After
Deconvolution
*Types of Deconvolution:
1. DBS & DAS
• DBS: is Deconvolution before stack (standard process
applied to all data)
DBS removes any short multiples & reverberations
(relatively short
200-400ms)
• DAS: is Deconvolution after stack (mainly used in
marine data)
DAS removes long period multiple
2. Spike Deconvolution & Predictive
Deconvolution:
• Spike Deconvolution: used for sources as
air gun & Dynamite (used before stack).
• Predictive Deconvolution: used for
sources as Weight drops (which doesn’t generate
many high frequencies)
Outcomes
Positive
• Improved Resolution
• Multiple Energy Attenuated
Negative
 Increased B/W can boost random
noise
 Non Deterministic Process
Thanks

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Deconvolution

  • 1. Deconvolutio n Ahmed El_Sayed Hamza 4th level Geophysics Geology Department_SCU
  • 2. *A step in seismic signal processing to recover high frequencies, attenuate multiples, equalize amplitudes, produce a zero-phase wavelet or for other purposes that generally affect the wave shape.
  • 3. *Objective: 1-Increase the vertical resolution of the data. 2-Increasing the vertical resolution of the data increase our ability to see subsurface layers. 3-Attenuate periodic multiple energy
  • 4.
  • 5.
  • 7. *Types of Deconvolution: 1. DBS & DAS • DBS: is Deconvolution before stack (standard process applied to all data) DBS removes any short multiples & reverberations (relatively short 200-400ms) • DAS: is Deconvolution after stack (mainly used in marine data) DAS removes long period multiple
  • 8. 2. Spike Deconvolution & Predictive Deconvolution: • Spike Deconvolution: used for sources as air gun & Dynamite (used before stack). • Predictive Deconvolution: used for sources as Weight drops (which doesn’t generate many high frequencies)
  • 9.
  • 10. Outcomes Positive • Improved Resolution • Multiple Energy Attenuated Negative  Increased B/W can boost random noise  Non Deterministic Process