1887

Abstract

Summary

The goal of this study is to evaluate the low frequency effects observed below some reservoirs in the North Sea. Three reservoir models were built based on the well logs from those reservoirs. Seismic P-wave modeling was performed on the reservoirs using an asymptotic solution to Biot’s media at different frequencies. In this case, the seismic P-wave response from a reservoir zone consists of two main components: the response due to the main P-wave reflections from the reservoir top and bottom, and the response due to converted P-waves reflected from the heterogeneities within the reservoir zone. Both solid matrix and fluid contents vary through the reservoir zone. Hence, they contribute to the generation of converted P-waves. The results of the modeling show that the heterogeneities within reservoir zones may affect seismic P-wave responses from such a reservoir. The study results show that the impact of reservoir heterogeneous nature is most pronounced at low seismic frequencies (around 5 Hz). In this case, the seismic traces from a naturally fractured highly heterogeneous reservoir model are most distinguishable from their homogeneous analogues.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201801453
2018-06-11
2024-03-28
Loading full text...

Full text loading...

References

  1. AhmadS.S., BrownR.J., EscalonaA., and Rosland, B.O.
    [2017] Frequency-dependent velocity analysis and offset-dependent low-frequency amplitude anomalies from hydrocarbon-bearing reservoirs in the southern North Sea, Norwegian sector. Geophysics, 82(6), N51–N60.
    [Google Scholar]
  2. BiotM.A.
    [1956a] Theory of propagation of elastic waves in a fluid saturated porous solid, I- Low-frequency range. J. Acoust. Soc. Am., 28, 168–178.
    [Google Scholar]
  3. [1956b] Theory of propagation of elastic waves in a fluid saturated porous solid, II, Higher frequency range. J. Acoust. Soc. Am., 28, 179–191.
    [Google Scholar]
  4. Barenblatt, G.I., Zheltov, Yu.P., and Kochina, I.N.
    [1960] Basic concepts in the theory of seepage of homogeneous liquids in fissured rocks. J. Applied Mathematics and Mechanics (PMM), 24(5), 1286–1303 (English translation from Russian).
    [Google Scholar]
  5. Brekhovskikh, L.M.
    [1960] Waves in Layered Media. Academic, New York.
    [Google Scholar]
  6. Carcione, J.M., and Picotti, S.
    [2006] P-wave seismic attenuation by slow-wave diffusion: effects of inhomogeneous rock properties. Geophysics, 71(3), O1–O8.
    [Google Scholar]
  7. Chabyshova, E., and Goloshubin, G.
    [2014] Seismic modeling of low-frequency “shadows” beneath gas reservoirs. Geophysics, 79(6), D417–D423.
    [Google Scholar]
  8. Gassmann, F.
    [1951] Über die Elastizität poröser Medien. Vierteljahrsschrift der Naturforschenden Gesellschaft in Zürich, 96, 1–23.
    [Google Scholar]
  9. Goloshubin, G.M., Korneev, V.A., and Vingalov, V.M.
    [2002] Seismic low-frequency effects from oil-saturated reservoir zones. 72nd Annual International Meeting, Soc. Explor. Geophys., Expanded Abstracts, 1813–1816
    [Google Scholar]
  10. Goloshubin, G. M., and Silin, D.B. [2006], Frequency-dependent seismic reflection from a permeable boundary in a fractured reservoir. 76th Annual International Meeting, SEG, Expanded Abstracts, 1742–1746.
    [Google Scholar]
  11. Pride, S.R., and Berryman, J.G.
    [2003a] Linear dynamics of double-porosity dual-permeability materials. I. Governing equations and acoustic attenuation. Phys. Rev. E68, 036603.
    [Google Scholar]
  12. [2003b] Linear dynamics of double-porosity dual-permeability materials. II. Fluid transport equations. Phys. Rev. E68, 036604.
    [Google Scholar]
  13. SilinD.B. and GoloshubinG.M.
    [2010] An asymptotic model of seismic reflection from a permeable layer. Transp. Porous Media83, 233–56.
    [Google Scholar]
  14. White, J.E.
    [1975] Computed seismic speeds and attenuation in rocks with partial gas saturation. Geophysics, 40, 224–232.
    [Google Scholar]
  15. Zoeppritz, K.
    [1919] Erdbebenwellen VII b, Über Reflexion und Durchgang seismischer Wellen durch Unstetichkeitsflächen, Nachrichten von der Königlichen Gesellschaft der Wissenschaften zu Göttingen, Mathematisch-physikalische Klasse, 66–84.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201801453
Loading
/content/papers/10.3997/2214-4609.201801453
Loading

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