Mono or multi-channel seismic acquisition ?

Improve the signal/noise ratio

SIG 16.6x8.57 has 6 hydrophones per group, group spacing 8 m, and 57 m long

 

Post-processing is the key in multi-channel seismics.

But the configuration of the array requires some expertise.

The spacing of the common depth points (CDP) depends on the hydrophones group-spacing of the array, the speed of the vessel, and the shooting rate.

The group spacing is determined by the frequency of the acoustic source, the water depth of the site surveyed, and the offset between the source and the receiver array.


The seismic signal of a particular point is identical for each channel, except for the noise which can thus be discriminated.

Exemple of the same profile from the west side of the island of Ouessant at about 200 km (courtesy of UBO Brest, team of JP Rehault), recorded with one channel, compared with a six-channel coverage. 

Compare air gun and sparker data after data processing, on only 7 channels.

(courtesy of Unidad de Tecnologia Marina, Spain)


Multi-channel Delph Seismic analog acquisition

DELPH Seismic Analog Acquisition Unit is the latest topside generation for acquiring seismic data. Embedding all necessary inputs and outputs, it accurately digitizes single to multi-channel seismic signals. Thanks to a single Ethernet output, acquired data is logged on any laptop or workstation running DELPH Seismic Acquisition software. This is a new standard for high-resolution seismic surveys with simplified integration, maintenance and operation.

 

Master and slave triggering modes

• 24-bit digitizing accuracy

• RS-232 inputs, Ethernet output

• Available as rack and portable system

• DELPH Seismic Acquisition included

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The solution to digitize sparker, boomer, and any seismic analog signals. 4 to 24 seismic input channels. 24-bit analog to digital conversion. Rack mounted or mobile. Including Delph Seismic Acquisition Software, leader on the market.
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Delph Seismic interpretation

Standalone DELPH Seismic Interpretation core software provides full sub-bottom data display and processing. Interpretation of layers is available through horizon picking and annotation tools.


and for more info http://delph.ixblue.com