A key advantage of acquiring multi-component data using ocean bottom sensors is the ability to separate the full wavefield into up-going and down-going wavefields. To achieve clean up/down separation we need to eliminate the noise recorded by various components of the sensors. Unlike the hydrophone component, the geophone components recorded at the ocean floor are usually contaminated by a various noise modes, including Scholte waves, backscattering noise, converted shear waves and other various types of noise. In particular, converted shear waves cause a number of challenges during data processing and degrade the effectiveness of up/down separation. In this paper, a de-noising methodology is developed to obtain cleaner vertical geophone components. It uses all recorded components to suppress shear wave energy and comprises three steps: 1) design and apply a masking filter to decompose the vertical geophone traces into less sensitive and mutually dependent parts with the horizontal geophone traces; 2) adaptive subtraction of the horizontal geophone traces from the vertical geophone traces; and 3) matching the signal envelope between hydrophone and vertical geophone traces. This de-noising process serves as a pre-conditioning step before the subsequent critical seafloor data processing steps including PZ summation, up/down deconvolution, and multiple removal.


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  1. Barr, F.J. and Sanders, J.L.
    [1989] Attenuation of water-column reverberation using pressure and velocity detectors in a water-bottom cable, SEG Technical Program Expanded Abstracts 1989, 653–656.
    [Google Scholar]
  2. Craft, K.L. and Paffenholtz, J.
    [2007] Geophone noise attenuation and wave-field separation using a multi-dimensional decomposition technique, SEG Technical Program Expanded Abstracts 2007, 2630–2634.
    [Google Scholar]
  3. Guitton, A. and Verschuur, D.J.
    [2004] Adaptive subtraction of multiples using the L1-norm, Geophysical Prospecting, 27–38.
    [Google Scholar]
  4. Paffenholz, J., Shurtleff, R., Hays, D. and Docherty, P.
    [2006a] Shear wave noise on OBS Vz data— Part I evidence from the field, 68th Annual International Conference and Exhibition, EAGE, Extended Abstracts, B046.
    [Google Scholar]
  5. Paffenholz, J., Docherty, P., Shurtleff, R. and Hays, D.
    [2006b] Shear Wave Noise on OBS Vz Data-Part II Elastic Modeling of Scatterers in the Seabed, 68th Conference and Exhibition, EAGE, Extended Abstracts, B047.
    [Google Scholar]
  6. Shatilo, A., Duren, R. and Raper, T.
    [2004] Effect of noise suppression on quality of 2C OBC image, SEG Technical Program Expanded Abstracts 2004, 917–920.
    [Google Scholar]
  7. Soubaras, R.
    [1996] Ocean bottom hydrophone and geophone processing, SEG Technical Program Expanded Abstracts 1996, 24–27.
    [Google Scholar]
  8. Wang, Y. and Wang, R.
    [2017] S-wave suppression in the vertical component of 4-C OBC data. SEG Technical Program Expanded Abstracts 2017, 2518–2522.
    [Google Scholar]

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