We present application of Amplitude versus Azimuth analysis (AVAz) for weak anisotropy (1–2 %) and thin layers (up to 25 m) case for Lower Paleozoic shale play in Northern Poland. Feasibility study using synthetic AVAz response indicated that we could expect detectable azimuthal signature given the expected low crack density only in the wet case (fluid-filled fractures), but luckily liquid phase is observed is studied area. We applied AVAz analysis on large, wide-azimuth 3D seismic survey after full-azimuth (non-sectored) pre-stack depth migration. AVAz results were then compared with volumetric seismic attributes giving correlation in major fault zones. Furthermore results were corroborated by available well data: XRMI image logs giving confirmation of acquired AVAz azimuths and by cross-dipole sonic logs confirming anisotropy level.


Article metrics loading...

Loading full text...

Full text loading...


  1. Bakulin, A., Grechka, V., Tsvankin, I.
    [2000] Estimation of fracture parameters from reflection seismic data—Part I: HTI model due to a single fracture set. Geophysics, 65(6), 1788–1802.
    [Google Scholar]
  2. Downton, J. E., & Roure, B.
    [2015] Interpreting azimuthal Fourier coefficients for anisotropic and fracture parameters. Interpretation, 3(3), ST9–ST27.
    [Google Scholar]
  3. Kowalski, H., Godlewski, P., Kobusinski, W., Makarewicz, W., Podolak, M., Nowicka, A., Mikolajewski, Z., Chase, D., Dafni, R., Canning, A. and Koren, Z.
    [2014] Imaging and characterization of a shale reservoir onshore Poland, using full-azimuth seismic depth. First Break, 32, 101–109.
    [Google Scholar]
  4. Roach, L., Angus, D., White, D.
    [2015] Determining the limitations to deep reservoir caprock fracture characterisation using AVOA analysis. The Third Sustainable Earth Science Conference & Exhibitionabstracts.
    [Google Scholar]
  5. Rüger, A
    . [2001] Reflection coefficients and azimuthal AVO analysis in anisotropic media. No. 10. Society of Exploration Geophysicists.
    [Google Scholar]
  6. Schoenberg, M.
    [1980] Elastic wave behavior across linear slip interfaces. The Journal of the Acoustical Society of America68 (5), 1516–1521.
    [Google Scholar]
  7. Slota-Valim, M., Sowiżdżal, K., Jedrzejowska-Tyczkowska, H. B.
    [2016] Seismic Driven 3D Geomechanical Model of Lower Paleozoic Shale Formation (Eastern Europe)-Case Study. 78th EAGE Conference and Exhibition, Extended Abstracts.
    [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