Seismic Data ProcessingZGE 373

Marine Seismic Acquisition

Prepared by: Dr. Amin Khalil

Marine Seismic Sources: Airgun cont’d

Response from an airgun

Air gun array

One air gun Array of air guns

single

Arra

y

desired

Tuning An Air Gun Array

•Summing the signal of multiple guns creates a more desirable signal•Note the relative scales of the left and right plots

From

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Example of array

Source signature change with Depths

Definition

Ghosts

Effect of water layer

M u l t i p l e s

Main Components

How are things actually looks like

Hydrophone

Principle of piezoelectric effect

Voltage proportional to the variation of the pressure

Example

Illastration

End

Thank you