iSIMM experience with peak- and bubble-tuned sources for generating low frequencies

Christie, P. A. F. and Lunnon, Z. C. and White, R. S. and Team, iSimm (2006) iSIMM experience with peak- and bubble-tuned sources for generating low frequencies. iSIMM, 5pp., expanded abstract.

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Abstract

The iSIMM project has demonstrated the effectiveness of low-frequency acquisition in countering the loss due to scattering by the high-impedance contrasts and rough surfaces presented by stacked basalt flows (Spitzer et al., 2005). Both the ocean-bottom seismometer (OBS) profiles and the densely sampled towed-streamer profiles in the iSIMM surveys allowed comparison of deep-towed, peak-tuned, and bubble-tuned airgun sources. Supported by earlier analysis (Lunnon et al., 2003), we find source tow depth has greater impact upon bandwidth than does tuning mode, although, for the configurations tested, the bubble-tuned source produced a more compact signature. Shot-by-shot signature deconvolution was successfully applied to bubble-tuned streamer data in sub-critical regimes, but wide-angle signatures were adversely affected by standard deconvolution. This paper evaluates the performance of the peak- and bubble-tuned sources and presents a robust shaping deconvolution. ...

Item Type: Book
Uncontrolled Keywords: 2006 AREP IA51 2006 P
Subjects: 02 - Geodynamics, Geophysics and Tectonics
Divisions: 02 - Geodynamics, Geophysics and Tectonics
Volume: A034
Page Range: 5pp., expanded abstract
Depositing User: Sarah Humbert
Date Deposited: 16 Feb 2009 13:01
Last Modified: 23 Jul 2013 10:01
URI: http://eprints.esc.cam.ac.uk/id/eprint/84

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