Quantifying the effect of the water layer in shallow marine active source EM

D. Wright; A. Ziolkowski

doi:10.1190/1.3513919

Quantifying the effect of the water layer in shallow marine active source EM

D. Wright, A. Ziolkowski

School of Geosciences

Research output: Chapter in Book/Report/Conference proceeding › Other chapter contribution

Abstract / Description of output

The water layer above the source and receiver in active source marine EM surveying is known to affect the measured response with a significant amount of energy travelling from the source to the receiver through the air. This has the effect of reducing the sensitivity to resistivity variations in the subsurface. This is especially true in shallow water. The use of a transient source waveform allows for a degree of temporal separation of the water layer and subsurface responses; this separation increases for decreasing water depth and decreasing subsurface resistivity. In the frequency domain no such separation exists and the airwave is only suppressed by increasing water depth.

Original language	English
Title of host publication	Society of Petroleum Engineers - 73rd European Association of Geoscientists and Engineers Conference and Exhibition 2011 - Incorporating SPE EUROPEC 2011
Pages	4565-4569
Number of pages	5
Volume	6
DOIs	https://doi.org/10.1190/1.3513919
Publication status	Published - 1 Jan 2011

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10.1190/1.3513919

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abstract = "The water layer above the source and receiver in active source marine EM surveying is known to affect the measured response with a significant amount of energy travelling from the source to the receiver through the air. This has the effect of reducing the sensitivity to resistivity variations in the subsurface. This is especially true in shallow water. The use of a transient source waveform allows for a degree of temporal separation of the water layer and subsurface responses; this separation increases for decreasing water depth and decreasing subsurface resistivity. In the frequency domain no such separation exists and the airwave is only suppressed by increasing water depth.",

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Quantifying the effect of the water layer in shallow marine active source EM. / Wright, D.; Ziolkowski, A.
Society of Petroleum Engineers - 73rd European Association of Geoscientists and Engineers Conference and Exhibition 2011 - Incorporating SPE EUROPEC 2011. Vol. 6 2011. p. 4565-4569.

Research output: Chapter in Book/Report/Conference proceeding › Other chapter contribution

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AU - Ziolkowski, A.

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N2 - The water layer above the source and receiver in active source marine EM surveying is known to affect the measured response with a significant amount of energy travelling from the source to the receiver through the air. This has the effect of reducing the sensitivity to resistivity variations in the subsurface. This is especially true in shallow water. The use of a transient source waveform allows for a degree of temporal separation of the water layer and subsurface responses; this separation increases for decreasing water depth and decreasing subsurface resistivity. In the frequency domain no such separation exists and the airwave is only suppressed by increasing water depth.

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M3 - Other chapter contribution

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BT - Society of Petroleum Engineers - 73rd European Association of Geoscientists and Engineers Conference and Exhibition 2011 - Incorporating SPE EUROPEC 2011

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Quantifying the effect of the water layer in shallow marine active source EM

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