Recently, PETRONAS has acquire high density rich azimuth OBN multi-component seismic in Bokor field, Offshore Sarawak Malaysia (Ghazali et. al, 2018). It is found that the PP image is much superior compared to the PS image where PS suffers even more strong ‘gas clouds’ effect ( Figure 1 ). The amplitude attenuation in PS image is also worse than PP image. These obtained data are basically opposing to our current understanding on the multicomponent seismic data. Hence, in this paper we are investigate the possible reason on PS scattering and amplitude attenuation seen in the PS image section by modelling the full elastic wavefield using 2nd order finite difference staggered grid scheme with advance HPML technique. This analysis may help in the interpretation of the seismic data to distinguish between the reflections and the multiples for better reservoir characterization and may help in quality control of multicomponent processing.


Article metrics loading...

Loading full text...

Full text loading...


  1. Gaiser, J. E.
    (2016). 3C seismic and VSP: Converted waves and vector wavefield applications: SEG, Distinguished instructor series, 19.
    [Google Scholar]
  2. Ghazali, A. R., Verschuur, D. J., & Gisolf, A.
    (2008). Seismic imaging through gas clouds: A data- driven imaging strategy. In SEG Technical Program Expanded Abstracts 2008 (pp. 2302–2306). Society of Exploration Geophysicists.
    [Google Scholar]
  3. Granli, J. R., Arntsen, B., Sollid, A., & Hilde, E.
    (1999). Imaging through gas-filled sediments using marine shear-wave data. Geophysics, 64(3), 668–677.
    [Google Scholar]
  4. Knapp, S., Payne, N., & Johns, T.
    (2001). Imaging through gas clouds: a case history from the Gulf of Mexico. In SEG Technical Program Expanded Abstracts 2001 (pp. 776–779). Society of Exploration Geophysicists.
    [Google Scholar]
  5. Lin, Y. N., Wu, X., Xie, Y., Zhou, J., Sulaiman, S., Turner, J., & Wei, Z.
    (2016). Imaging through Mega Gas Clouds in Offshore Brunei. In 78th EAGE Conference and Exhibition 2016.
    [Google Scholar]
  6. Li, J.
    (2017). Borehole wave field modeling, reflection extraction and reverse time migration in acoustic imaging logging.
    [Google Scholar]
  7. Virieux, J.
    (1986). P-SV wave propagation in heterogeneous media: Velocity-stress finite-difference method. Geophysics, 51(4), 889–901.
    [Google Scholar]

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error