1887
Volume 25 Number 2
  • ISSN: 0263-5046
  • E-ISSN: 1365-2397

Abstract

Data from the Delft Air Gun Experiment demonstrate the success of a new method to determine the far-field signature of a marine seismic source array from near-field measurements. The method requires the wavefield of the array to be measured in the near field with hydrophones of known relative sensitivity and in a known geometrical configuration with respect to the monopole source elements within the array. If there are n such source elements, at least n near-field hydrophones are required to determine the wavefield. The results from a North Sea line shot with a tuned airgun array show that the signature deconvolution for the wavelet calculated from these near-field measurements is at least as effective as the signature deconvolution for the measured far-field signature. The same line was shot again with the air guns out of synchronisation by as much as 100 ms; the data from the near-field hydrophones allow a deterministic signature deconvolution to be performed to yield a section very similar to that obtained with the tuned array. Without this signature deconvolution on the detuned data, the recovered section is unacceptable.

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/content/journals/10.3997/1365-2397.2007005
2007-02-01
2024-03-29
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http://instance.metastore.ingenta.com/content/journals/10.3997/1365-2397.2007005
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  • Article Type: Research Article
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