Amplitude Recovery and Deconvolution of Chirp and Boomer Data for Marine Geology and Offshore Engineering

Eleonora Denich, Aldo Vesnaver and Luca Baradello
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Eleonora Denich: Department of Mathematics and Geosciences, University of Trieste, 34127 Trieste, Italy
Aldo Vesnaver: National Institute of Oceanography and Applied Geophysics-OGS, 34010 Sgonico, Italy
Luca Baradello: National Institute of Oceanography and Applied Geophysics-OGS, 34010 Sgonico, Italy

Energies, 2021, vol. 14, issue 18, 1-15

Abstract: The processing of Chirp data is limited by the usual recording of the signal envelope, which enhances its immediate visibility but prevents applying methods based on wave equations. This is normally not the case for Boomer data. However, both systems are monochannel instruments, which cannot estimate properly the propagation velocity of the signal in the rocks. In this paper, we present two theorems: the first one links the Chirp or Boomer source spectrum with an expected amplitude decay curve; the second one defines conditions for the deconvolution stability of the enveloped Boomer signal when the full waveform of the source signal is known. In this way, we can jointly process and integrate heterogeneous surveys including both data types. We validated the proposed algorithms by applying them to synthetic and real data. The presented tools can improve the image resolution and the characterization of geological formations in marine surveys by reflectivity anomalies, which are distorted by standard equalization methods.

Keywords: Chirp; Boomer; deconvolution; marine survey; sea floor characterization; envelope; gain recovery; inversion; offshore engineering (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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