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Transport in Porous Media

, 80:253 | Cite as

Capillary Pressures by Fluid Saturation Profile Measurements During Centrifuge Rotation

  • Martin A. FernøEmail author
  • Øyvind Bull
  • Pål Ove Sukka
  • Arne Graue
Article

Abstract

A novel centrifuge technique to obtain the capillary pressure curve by measuring the local fluid distribution in a spinning core is presented. The Nuclear Tracer Imaging Centrifuge (NTIC) method measures the fluid saturation profile along the length of the core to directly obtain the capillary pressure curve. The proposed method is superior to conventional centrifuge techniques because (1) the capillary pressure curve is obtained at one rotational speed, (2) core plugs are not removed from the spinning centrifuge for imaging, and (3) no mathematical solution is needed to calculate the capillary pressure curve. The literature states that the various mathematical solutions used in conventional centrifuge tests are the greatest source of error, not the uncertainty in the experimental data. By eliminating the dependence of such solutions, the NTIC represents an alternative to conventional centrifuge tests, and may be used to validate the various mathematical procedures applied in conventional centrifuge capillary pressure tests. NTIC may also confirm the applicability of other imaging techniques that rely on core plug removal for saturation imaging, by verifying if there is no fluid re-distribution at static conditions.

Keywords

Capillary pressure NTIC In situ fluid saturations Centrifugal rotation 

References

  1. Al-Omair, O.A., Christiansen, R.L.: Measurement of capillary pressure by direct visualization of a centrifuge experiment. International symposium of the society of core analysts. Abu Dhabi, UAE, 1998Google Scholar
  2. App J.F., Mohanty K.K.: The benefit of local saturation measurements in relative permeability estimation from centrifuge experiments. SPE J. 7(3), 288–298 (2002)Google Scholar
  3. Bailey, N.A., Rowland, P.R., Robinson, D.P.: Nuclear measurements of fluid saturation in EOR flood experiments. European symposium on enhanced oil recovery. Bournemouth, UK, 21–23 Sept. 1981Google Scholar
  4. Baldwin B.A., Spinler E.A.: A direct method for simultaneously determining positive and negative capillary pressure curves in reservoir rock. J. Petrol. Sci. Eng. 20(3–4), 161–165 (1998). doi: 10.1016/S0920-4105(98)00016-3 CrossRefGoogle Scholar
  5. Bardsen H., Nilsen V., Leknes J., Hove A.: Quantifying saturation distributions and capillary pressures using centrifuge and computer tomography. Academic Press, San Diego, CA, USA (1991)Google Scholar
  6. Brown H.W.: Capillary pressure investigations. Trans. AIME 192, 67–74 (1951)Google Scholar
  7. Chardake-Riviere C., Forbes P., Zhang J.F., Chaven G., Lenormand R.: Improving the Centrifuge Technique by measuring local saturations. SPE ATCE, Washington, DC, USA (1992)Google Scholar
  8. Chen, Q., Balcom, B.J.: Measurement of rock-core capillary pressure curves using a single-speed centrifuge and one-dimensional magnetic-resonance imaging. J. Chem. Phys. 122(21), (2005) doi: 10.1063/1.1924547
  9. Chen Z.A., Ruth D.: Measurement and interpretation of centrifuge capillary pressure curves-the sca survey data. Log. Anal. 36(5), 21–33 (1995)Google Scholar
  10. Christiansen, R.L.: Geometric concerns for accurate measurements of capillary pressure relationships with centrifuge methods. SPE Form. Eval. (December):311–314 (1992)Google Scholar
  11. Fernø, M.A., Treinen, R., Graue, A.: Experimental measurements of capillary pressure with the centrifuge technique—emphasis on equilibrium time and accuracy in production. International symposium of the society of core analysts. Calgary, Canada, 10–13 Sept. 2007Google Scholar
  12. Forbes, P., Chardaire-Rivière, C., Deflandre, F., Fleury, M.: Local saturation measurement while centrifuging (MWC) for improving centrifuge capillary-pressure curve determination, International symposium of the society of core analysts, Oklahoma City, OK, USA, 14–17 June 1992Google Scholar
  13. Forbes, P., Chen, Z.A., Ruth, D.: Quantitative analysis of radial effects on centrifuge capillary pressure curves, SPE ATCE, New Orleans, LA, 21–24 Sept. 1994a (unsolicited paper 28182)Google Scholar
  14. Forbes P.: Simple and accurate methods for converting centrifuge data into drainage an imbibition capillary pressure curves. Log. Anal. 35(4), 31–53 (1994b)Google Scholar
  15. Forbes, P.: Centrifuge data analysis techniques: an SCA survey on the calculation of drainage capillary pressure curves from centrifuge measurements. International symposium of the society of core analysts. Calgary, Canada, 8–10 Sept. 1997aGoogle Scholar
  16. Forbes, P.: Quantitative evaluation and correction of gravity effects on centrifuge capillary pressure curves. International symposium of the society of core analysts. Calgary, Canada, 8–10 Sept. 1997bGoogle Scholar
  17. Forbes, P.: The H&B boundary condition in centrifuge Pc experiments (or why there is not experimental evidence that the pressure field model ever failed). International symposium of the society of core analysts, Abu Dhabi, UAE, 2000Google Scholar
  18. Graue, A., Bognø, T., Moe, R.W., Baldwin, B.A., Spinler, E.A., Maloney, D., Tobola, D.P.: Impacts of wettability on capillary pressure and relative permeability. International symposium of the society of core analysts. Golden, CO, USA, 1999Google Scholar
  19. Graue, A., Bognø, T., Spinler, E.A., Baldwin, B.A.: A method for measuring in-situ capillary pressures at different wettabilities using live crude oil at reservoir conditions. International symposium of the society of core analysts. Monterey, CA, USA, 2002Google Scholar
  20. Green, D.P., Dick, J.R., Gardner, J., Balcom, B.J., Zhou, B.: Comparison study of capillary pressure curves obtained using traditional centrifuge and magnetic resonance imaging techniques. International Symposium of the society of core analysts. Calgary, Canada, 2007Google Scholar
  21. Hassler G.L., Brunner E.: Measurement of capillary pressure in small core samples. Trans. AIME 160, 114–123 (1945)Google Scholar
  22. King, M.J., Flazone, A.J., Cook, W.R., Jennings, J.W.J., Mills, W.H. Simultaneous determination of residual saturation and capillary pressure curves utilizing the ultracentrifuge, SPE ATCE. New Orleans, Louisiana, USA, 5–8 Oct. 1986Google Scholar
  23. O’Meara D.J. Jr., Vinegar H.J.: Method for determining capillary pressure and relative permeability by imaging. U. S. Pat. 893(4), 504 (1988)Google Scholar
  24. O’Meara D.J. Jr., Hirasaki G.J., Rohan J.A.: Centrifuge measurements of capillary pressure: part 1—outflow boundary condition. SPE Reserv. Eng. 7(1), 133–142 (1992)Google Scholar
  25. Sabatier, L.: Comparative study of drainage capillary pressures using different techniques and for different fluid system. International symposium of the society of core analysts, Stavanger, Norway, 1994Google Scholar
  26. Sallier, B., Hamon, G.: Micritic limestone of the middle-east: influence of wettability, pore network and experimental technique on drainage capillary pressure curve. International symposium of the society of core analysts, Toronto, Canada, 21–25 Aug. 2005Google Scholar
  27. Seth S., Morrow N.R.: Efficiency of the conversion of work of drainage to surface energy for sandstone and carbonate. SPE Reserv. Eval. Eng. 10(4), 338–347 (2007)Google Scholar
  28. Sukka, P.O.: Improving the nuclear tracer imaging centrifuge method for measuring in-situ capillary pressures and comparisons with other methods. Master Thesis, Dept. of Physics and Technology, University of Bergen, Bergen, Norway, 2004Google Scholar
  29. Wunderlich R.W.: Imaging of Wetting and Nonwetting Phase Distributions: application to centrifuge capillary pressure measurements. SPE ATCE, Las Vegas, NV, USA (1985)Google Scholar

Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Martin A. Fernø
    • 1
    Email author
  • Øyvind Bull
    • 1
    • 2
  • Pål Ove Sukka
    • 1
    • 2
  • Arne Graue
    • 1
  1. 1.Department of Physics and TechnologyUniversity of BergenBergenNorway
  2. 2.StatoilHydroBergenNorway

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