Optimal Processing of Marine High-Resolution Seismic Reflection (Chirp) Data |
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| Authors: | Quinn R Bull JM Dix JK |
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| Institution: | (1) Departments of Geology and 2Oceanography, Southampton Oceanography Centre, University of Southampton, Southampton, SO 14 3ZH, U.K. |
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| Abstract: | Chirp frequency-modulated (FM) systems offer deterministic, repeatable source-signatures for high-resolution, normal incidence marine seismic reflection data acquisition. An optimal processing sequence for uncorrelated Chirp data is presented to demonstrate the applicability of some conventional seismic reflection algorithms to high-resolution data sets, and to emphasise the importance of a known source-signature. An improvement of greater than 60dB in the signal- to-noise ratio is realised from correlating the FM reflection data with the transmitted pulse. Interpretability of ringy deconvolved data is enhanced by the calculation of instantaneous amplitudes. The signal-to-noise ratio and lateral reflector continuity are both improved by the application of predictive filters whose effectiveness are aided by the repeatability of the Chirp source. |
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| Keywords: | Chirp processing source-signature high-resolution seismic |
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