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Chirp sub-bottom profiler source signature design and field testing

Chirp sub-bottom profiler source signature design and field testing
Chirp sub-bottom profiler source signature design and field testing
Chirp sub-bottom profilers are widely used to collect very high resolution 2D marine seismic data. They produce high signal-to-noise ratio data using highly repeatable source signatures. A 3D chirp system is currently developed at the Southampton Oceanography Centre.We developed and tested a number of alternative source sweeps to optimise the vertical resolution and penetration capability of the system. The source sweeps use the same frequency range of 1.5 mU 13 kHz but vary in their instantaneous frequency as well as their envelope function. Non-gaussian envelope functions and non-linear instantaneous frequency function are used. In field trials in the West Solent (UK) the same seismic line was repeatedly recorded using different source sweeps. The data sections were analysed for resolution and attenuation, and the results were compared to model results. We show that the newly developed sweeps offer advantages over the signatures originally used and we demonstrate that the source sweep should be chosen depending on the survey task.
1029-7006
EAE03A-01556
Gutowski, M.
1f744df4-8ddc-4f4e-af83-1e3827fe2940
Bull, J.M.
974037fd-544b-458f-98cc-ce8eca89e3c8
Dix, J.K.
efbb0b6e-7dfd-47e1-ae96-92412bd45628
Henstock, T.
27c450a4-3e6b-41f8-97f9-4e0e181400bb
Hogarth, P.
79c358a0-cd75-492c-9aa2-28bd56dbc731
White, P.R.
2dd2477b-5aa9-42e2-9d19-0806d994eaba
Leighton, T.G.
3e5262ce-1d7d-42eb-b013-fcc5c286bbae
Gutowski, M.
1f744df4-8ddc-4f4e-af83-1e3827fe2940
Bull, J.M.
974037fd-544b-458f-98cc-ce8eca89e3c8
Dix, J.K.
efbb0b6e-7dfd-47e1-ae96-92412bd45628
Henstock, T.
27c450a4-3e6b-41f8-97f9-4e0e181400bb
Hogarth, P.
79c358a0-cd75-492c-9aa2-28bd56dbc731
White, P.R.
2dd2477b-5aa9-42e2-9d19-0806d994eaba
Leighton, T.G.
3e5262ce-1d7d-42eb-b013-fcc5c286bbae

Gutowski, M., Bull, J.M., Dix, J.K., Henstock, T., Hogarth, P., White, P.R. and Leighton, T.G. (2003) Chirp sub-bottom profiler source signature design and field testing. Geophysical Research Abstracts, 5, EAE03A-01556.

Record type: Article

Abstract

Chirp sub-bottom profilers are widely used to collect very high resolution 2D marine seismic data. They produce high signal-to-noise ratio data using highly repeatable source signatures. A 3D chirp system is currently developed at the Southampton Oceanography Centre.We developed and tested a number of alternative source sweeps to optimise the vertical resolution and penetration capability of the system. The source sweeps use the same frequency range of 1.5 mU 13 kHz but vary in their instantaneous frequency as well as their envelope function. Non-gaussian envelope functions and non-linear instantaneous frequency function are used. In field trials in the West Solent (UK) the same seismic line was repeatedly recorded using different source sweeps. The data sections were analysed for resolution and attenuation, and the results were compared to model results. We show that the newly developed sweeps offer advantages over the signatures originally used and we demonstrate that the source sweep should be chosen depending on the survey task.

Full text not available from this repository.

More information

Published date: 2003
Additional Information: Presented at European Geophysical Society, Nice, France, 6-11 April 2003

Identifiers

Local EPrints ID: 11000
URI: https://eprints.soton.ac.uk/id/eprint/11000
ISSN: 1029-7006
PURE UUID: 1c3db711-9edf-49c5-99b2-8d39643a383e
ORCID for T. Henstock: ORCID iD orcid.org/0000-0002-2132-2514
ORCID for P.R. White: ORCID iD orcid.org/0000-0002-4787-8713
ORCID for T.G. Leighton: ORCID iD orcid.org/0000-0002-1649-8750

Catalogue record

Date deposited: 01 Jul 2005
Last modified: 14 Dec 2018 01:38

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