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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
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