1887

Abstract

Summary

We demonstrate the use of rock physics inversion for estimating CO2 saturation and rock frame properties at the Sleipner CO2 storage pilot in the North Sea. We investigate the relation between rock physics properties and elastic attributes for the Utsira unconsolidated sandstone. An effective fluid phase plugged into Biot theory is used together with the Brie mixing theory for the calculation of effective bulk modulus. We use the estimated viscoelastic properties under different brine and CO2 distributions to invert selected poroelastic parameters from various input data parametrizations. By analysis of the sensitivity tests, we can conclude that CO2 saturation can be well estimated from only VP input, especially for high brine saturation. The quality factors of both P-wave and S-wave velocities help better estimate CO2 saturation and reduce the uncertainties. In a second part, the method is applied to well log data acquired prior to CO2 injection. The S-wave velocities are derived using empirical relations from the P-wave velocities and density and used to estimate the rock frame moduli of the Utsira sand before CO2 injection. We found that the S-wave velocities are crucial to help the estimation of frame moduli.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201701101
2017-06-12
2024-03-19
Loading full text...

Full text loading...

References

  1. ARTS, R., CHADWICK, A., EIKEN, O., THIBEAU, S. & NOONER, S.
    2008. Ten years’ experience of monitoring CO2 injection in the Utsira Sand at Sleipner, offshore Norway. First break, 26.
    [Google Scholar]
  2. ARTS, R., EIKEN, O., CHADWICK, A., ZWEIGEL, P., VAN DER MEER, L. & ZINSZNER, B.
    2004. Monitoring of CO 2 injected at Sleipner using time-lapse seismic data. Energy, 29, 1383–1392.
    [Google Scholar]
  3. BRIE, A., PAMPURI, F., MARSALA, A. & MEAZZA, O.
    Shear sonic interpretation in gas-bearing sands. SPE Annual Technical Conference and Exhibition, 1995. Society of Petroleum Engineers.
    [Google Scholar]
  4. CARCIONE, J.M., PICOTTI, S., GEI, D. & ROSSI, G.
    2006. Physics and seismic modeling for monitoring CO2 storage. Pure and Applied Geophysics, 163, 175–207.
    [Google Scholar]
  5. CASTAGNA, J. P., BATZLE, M. L. & EASTWOOD, R. L.
    1985. Relationships between compressional-wave and shear-wave velocities in clastic silicate rocks. Geophysics, 50, 571–581.
    [Google Scholar]
  6. DUPUY, B., GARAMBOIS, S., ASNAASHARI, A., BALHARETH, H.M., LANDRO, M., STOVAS, A. & VIRIEUX, J.
    2016a. Estimation of rock physics properties from seismic attributes — Part 2: Applications. GEOPHYSICS, 81, M55–M69.
    [Google Scholar]
  7. DUPUY, B., GARAMBOIS, S. & VIRIEUX, J.
    2016b. Estimation of rock physics properties from seismic attributes — Part 1: Strategy and sensitivity analysis. GEOPHYSICS, 81, M35–M53.
    [Google Scholar]
  8. FURRE, A. K., KIER, A. & EIKEN, O.
    2015. CO2-induced seismic time shifts at Sleipner. Interpretation, 3, SS23–SS35.
    [Google Scholar]
  9. FURRE, A. K. & EIKEN, O.
    2014. Dual sensor streamer technology used in Sleipner CO2 injection monitoring. Geophysical Prospecting, 62, 1075–1088.
    [Google Scholar]
  10. LANDRO, M.
    2001. Discrimination between pressure and fluid saturation changes from time-lapse seismic data. Geophysics, 66, 836–844.
    [Google Scholar]
  11. LINDEBERG, E.
    2013. In: CALCULATION OF THERMODYNAMIC PROPERTIES OF CO2, C., H2O AND THEIR MIXTURES ALSO INCLUDING SALT WITH THE EXCEL MACRO“CO2 THERMODYNAMICS”. (ed.). Trondheim: SINTEF.
    [Google Scholar]
  12. MAVKO, G., MUKERJI, T. & DVORKIN, J.
    2009. The rock physics handbook: Tools for seismic analysis of porous media, Cambridge university press.
    [Google Scholar]
  13. PRIDE, S.
    2005. Hydrogeophysics: Water Science and Technology Library: Springer.
    [Google Scholar]
  14. TEJA, A. & RICE, P.
    1981. Generalized corresponding states method for the viscosities of liquid mixtures. Industrial & Engineering Chemistry Fundamentals, 20, 77–81.
    [Google Scholar]
  15. ZWEIGEL, P.
    2000. Reservoir geology of the storage unit in the Sleipner CO2-injection case. Trondheim, Norway: SINTEF.
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201701101
Loading
/content/papers/10.3997/2214-4609.201701101
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