Deconvolution: 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.

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

6. Before
Deconvolution
After
Deconvolution

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)

10. Outcomes
Positive
• Improved Resolution
• Multiple Energy Attenuated
Negative
 Increased B/W can boost random
noise
 Non Deterministic Process

11. Thanks