Deep-towed High Resolution multichannel seismic imaging

Type Article
Date 2014-11
Language English
Author(s) Marsset Bruno1, Menut Eric2, Ker StephanORCID1, Thomas Yannick1, Regnault Jean-Pierre2, Leon Pierre3, Martinossi Henri3, Artzner Laurent4, Chenot Damien3, Dentrecolas Stephane3, Spychalski B.5, Mellier G.6, Sultan NabilORCID1
Affiliation(s) 1 : IFREMER, REM GM, Ctr Brest, F-29280 Plouzane, France.
2 : IFREMER, REM RDT, Ctr Brest, F-29280 Plouzane, France.
3 : IFREMER, ISM SM S3E, ZP Bregaillon, F-83507 La Seyne Sur Mer, France.
4 : IFREMER, ISM SM IIDM, ZP Bregaillon, F-83507 La Seyne Sur Mer, France.
5 : High Tech Inc, Long Beach, MS 39560 USA.
6 : Sercel, F-44470 Carquefou, France.
Source Deep-sea Research Part I-oceanographic Research Papers (0967-0637) (Pergamon-elsevier Science Ltd), 2014-11 , Vol. 93 , P. 83-90
DOI 10.1016/j.dsr.2014.07.013
WOS© Times Cited 16
Keyword(s) Deep-towed seismics, Multichannel streamer, Seismic imaging
Abstract High Resolution (220–1050 Hz) seismic acquisition performed in deep water using deep-towed systems provides unrivalled lateral resolution when compared to conventional surface seismic. The lateral resolution of these acquisitions is controlled by the width of the first Fresnel zone, taking advantage of their positions close to the sea bottom. No current existing deep towed equipment can benefit from seismic imaging processing techniques to improve this resolution as a consequence of positioning inaccuracies. The technological developments of a digital deep-towed multichannel streamer are presented with a particular attention to positioning: each hydrophone incorporates a pitch, roll and heading sensor in order to monitor the constant deformation of the streamer in operation. The sea trials took place in July 2013 in the Mediterranean Sea. Pre-stack depth migration applied to the deep-towed multichannel data illustrates the potential of this emerging methodology in terms of penetration (12 dB improvement in Signal/Noise) and lateral resolution (mean signal wavelength: 3 m) when compared with deep-towed single-channel acquisition.
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Marsset Bruno, Menut Eric, Ker Stephan, Thomas Yannick, Regnault Jean-Pierre, Leon Pierre, Martinossi Henri, Artzner Laurent, Chenot Damien, Dentrecolas Stephane, Spychalski B., Mellier G., Sultan Nabil (2014). Deep-towed High Resolution multichannel seismic imaging. Deep-sea Research Part I-oceanographic Research Papers, 93, 83-90. Publisher's official version : https://doi.org/10.1016/j.dsr.2014.07.013 , Open Access version : https://archimer.ifremer.fr/doc/00206/31745/