ARE FIELD ARRAYS REALLY NEEDED?

Field arrays cancel random noise but their main function, I believe, is to cancel low-velocity coherent noises, something we now see is handled effectively by steep-dip deconvolution. While I do not advocate abandoning field arrays, it is pleasing to notice that with the arrival of steep-dip deconvolution, we are no longer so dependent on field arrays and perhaps coherent noises can be controlled where field arrays are impractical, such as certain 3-D geometries.

 

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Figure 2 Bottom is a North African vibrator shot profile (Y&C #10) after AGC. Middle is gapped 1-D decon. Top is steep-dip decon.

 

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Figure 3 Bottom is an Alberta dynamite shot profile (Y&C #25) after AGC. Middle is gapped 1-D decon. Top is steep-dip decon.

 

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Figure 4 Bottom is a North Sea air gun shot profile (Y&C #30) after AGC. Middle is gapped 1-D decon. Top is steep-dip decon.

 

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Figure 5 Bottom is a North Sea air gun shot profile (Y&C #31) after AGC. Middle is gapped 1-D decon. Top is steep-dip decon.

 

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Figure 6 Bottom is a Middle east Geoflex shot profile (Y&C #39) after AGC. Middle is gapped 1-D decon. Top is steep-dip decon.