L14_SeismicReflectionI-page6

L14_SeismicReflectionI-page6 - Static corrections Correct...

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Applied Geophysics – Seismic reflection I Gain recovery Preprocessing “Turn up the volume” to account for seismic attenuation 1. Could calculate the energy/amplitude loss using geometric spreading and apply a correction 2. Automatic gain control (AGC) apply a gain to equalize amplitude along the trace Pre-AGC Post-AGC Applied Geophysics – Seismic reflection I
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Unformatted text preview: Static corrections Correct for surface topography and the weathered surface layer Surface topography Time correction to each trace: ( ) V E E t d g g / = Source depth ( ) V E E t d s s / = total correction g s e t t t + = Shift each trace by this amount to line up deeper reflectors...
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