1887

Abstract

Summary

Since shales are the far most abundant overburden formation, understanding the geomechanical and rock physics behavior of shales is essential. We discuss a particular deep overburden shale in light of a thorough static and dynamic multi-directional data acquisition, as a basis for complete static and dynamic characterization assuming transverse isotropy. The stress-and strain-path dependence of the principal P- and S-wave velocities are also analyzed. These quantities are of great interest for interpretation of seismic or sonic-log overburden signatures upon reservoir depletion (or injection), as geomechanical simulations show significant variations of stress and strain changes throughout the overburden.

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/content/papers/10.3997/2214-4609.201801020
2018-06-11
2020-12-04
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References

  1. Barkved, O. and Kristiansen, T.G.
    [2005] Seismic time-lapse effects and stress changes: Examples from a compacting reservoir. The Leading Edge, 24, 1244–1248.
    [Google Scholar]
  2. Bauer, A, Holt, R.M, Fjær, E. and Stenebraten, J.
    [2013] Temperature dependence of ultrasonic velocities in shales. American Rock Mechanics Association paper no. 13–535.
    [Google Scholar]
  3. Davison, J.M., van den Bogert, P., Schutjens, P., Ita, J. and Fokker, P.
    [2013] Geomechanical technology for seal integrity analysis: The three-step approach. Proceedings of International Petroleum Technology Conference; Beijing, China. ITPC 17057.
    [Google Scholar]
  4. Fjær, E., Stroiz, A.M. and Holt, R.M.
    [2012] Combining static and dynamic measurements for evaluation of elastic dispersion. American Rock Mechanics Association paper no. 12–537.
    [Google Scholar]
  5. Hatchell, P. and Bourne, S.
    [2005] Rocks under strain: Strain-induced time-lapse time shifts are observed for depleting reservoirs. The Leading Edge, 24, 1222–1225.
    [Google Scholar]
  6. Holt, R.M, Bakk, A. and Bauer, A.
    [2016] The Importance of Overburden stress path in assessment of stress dependence for 4D applications. 78th EAGE Conference and Exhibition 2016. Extended abstract; DOI: 10.3997/2214‑4609.201601233.
    https://doi.org/10.3997/2214-4609.201601233 [Google Scholar]
  7. Horsrud, P., Sønstebø, E.F., Bøe, R.
    [1998] Mechanical and petrophysical properties of North Sea shales. J. Rock Mech. Min. Sci.8, 1009–1020.
    [Google Scholar]
  8. Johnston, D.H.
    [1987] Physical properties of shale at temperature and pressure. Geophysics52, 1391–1401.
    [Google Scholar]
  9. Larsen, I., Stenebråten, J.F., and Bakk, A.
    [2011] Stress dependent dynamic anisotropy in shales. Abstact and presentation at the 9th Euroconference on Rock Physics and Geomechanics, Trondheim. https://www.ntnu.edu/web/euroconference-2011/program.
    [Google Scholar]
  10. Lavrov, A.
    [2016] Dynamics of stresses and fractures in reservoir and cap rock under production and injection. Energy Procedia, 86, 381–390.
    [Google Scholar]
  11. Røste, T. and Ke, G.
    [2017] Overburden 4D time shifts — Indicating undrained areas and fault transmissibility in the reservoir. The Leading Edge, 36, 423–430.
    [Google Scholar]
  12. Sunday, A., Slatt, R.M. and Marfurt, K.J.
    [2010] Time-lapse (4D) effect and reservoir sand production pattern in a mature North Sea field. The Leading Edge, 30, 1020–1025.
    [Google Scholar]
  13. Szewczyk, D., Bauer, A., Holt, R.M.
    [2016] A new laboratory apparatus for the measurement of seismic dispersion under deviatoric stress conditions. Geophys. Prospect., 64, 789–798.
    [Google Scholar]
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