1887

Abstract

Summary

This paper deals with exploring elastic (bulk modulus and Young’s modulus) and plastic parameters (yield stress, creep and rebound) during deviatoric loading and time-dependent deformation. A series of experiments were carried out at Ekofisk reservoir temperature (130°C) to study the effect of four different fluids, viz., distilled water (DW), NaCl-brine, MgCl2-brine and seawater (SSW), on Mons outcrop chalk. The cores were deviatorically loaded and left to creep at a constant value of 69–73% of the axial yield stress obtained from reference tests with the same brine. Variations in the bulk modulus and Young’s modulus were observed as function of saturation fluid, although the significance of these observations require more data. SSW had the lowest yield stress followed by NaCl and MgCl2, and highest for DW, which conforms the results from earlier studies. The final creep strain was highest for SSW and was 1.3–1.5 times higher than for other brines. The core initially saturated by SSW showed the highest plastic component of the total strain inferring that the ions in SSW does play an important role in inducing permanent damage.

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/content/papers/10.3997/2214-4609.201700307
2017-04-24
2020-04-09
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References

  1. Doornhof, D., Kristiansen, T.G., Nagel, N.B., Pattillo, P.D., and Sayers, C.
    [2006] Compaction and Subsidence. Oilfield Review, 50–68.
    [Google Scholar]
  2. Gateway to the Paleobiology Database
    [1999]. Retrieved January 02, 2017 from http://fossilworks.org/bridge.pl?a=collectionSearch&collection no=3919
  3. Geys, J.F.
    [1980] Phymosomatoid Echinoids from the Campanian and the Maastrichtian of Belgium and the Netherlands. Paläontologische Zeitschrift, 54(3–4), 199–224.
    [Google Scholar]
  4. Hermansen, H., Thomas, L.K., Sylte, J.E., and Aasboe, B.T.
    [1997] Twenty Five Years of Ekofisk Reservoir Management. In: SPE Annual Technical Conference and Exhibition, SPE Paper 38927-MS.
    [Google Scholar]
  5. Hellmann, R., Renders, P., Gratier, J.P., and Guiguet, R.
    [2002a] Experimental Pressure Solution Compaction of Chalk in Aqueous Solutions, Part 1. Deformation Behavior and Chemistry. In: Water Rock Interactions, Ore Deposits, and Environmental Geochemistry: A Tribute to David A. Crerar, edited by R.Hellmann and S. A.Wood. Geochemical Society, 129–152.
    [Google Scholar]
  6. Hellmann, R., Gaviglio, P., Renders, P., Gratier, J.P., Bèkri, S., and Adler, P.
    [2002b] Experimental Pressure Solution Compaction of Chalk in Aqueous Solutions, Part 2. Deformation Examined by SEM, Posimetry, Synthetic Permeability, and X-Ray Computerized Tomography. In: Water Rock Interactions, Ore Deposits, and Environmental Geochemistry: A Tribute to David A. Crerar, edited by R.Hellmann and S. A.Wood. Geochemical Society, 153–178.
    [Google Scholar]
  7. Korsnes, R.I., Strand, S., Hoff, Ø., Pedersen, T., Madland, M.V., and Austad, T.
    [2006a] Does the Chemical Interaction Between Seawater and Chalk Affect the Mechanical Properties of Chalk?. In: Cottheim, A.V., Charlier, R., Thimus, J.F., Tshibangu, J.P. (eds.) Eurock, Multiphysics Coupling and Long Term Behaviour in Rock Mechanics.Taylor & Francis, London, 427–434.
    [Google Scholar]
  8. Korsnes, R.I., Madland, M.V., and Austad, T.
    [2006b] Impact of Brine Composition on the Mechanical Strength of Chalk at High Temperature. In: Cottheim, A.V., Charlier, R., Thimus, J.F., Tshibangu, J.P. (eds.) Eurock, Multiphysics Coupling and Long Term Behaviour in Rock Mechanics. Taylor & Francis, London, 133–140.
    [Google Scholar]
  9. Korsnes, R.I., Madland, M.V., Austad, T., Haver, S., and Rasland, G.
    [2008] The Effects of Temperature on the Water Weakening of Chalk by Seawater. Journal of Petroleum Science and Engineering, 60, 183–193.
    [Google Scholar]
  10. Kristiansen, T.G., Barkved, O.I., Buer, K., and Bakke, R.
    [2005] Production-Induced Deformations Outside the Reservoir and their Impact on 4D Seismic. In: International Petroleum Technology Conference, Doha, Qatar, 21–23 November, IPTC Paper 10818.
    [Google Scholar]
  11. Madland, M.V., Finsnes, A., Alkafadgi, A., Risnes, R., and Austad, T.
    [2006] The Influence of CO2 Gas and Carbonate Water on the Mechanical Stability of Chalk. Journal of Petroleum Science and Engineering, 51, 149–168.
    [Google Scholar]
  12. Madland, M.V., Midtgarden, K., Manafov, R., Korsnes, R.I., Kristiansen, T.G., and Hiorth, A.
    [2008] The Effect of Temperature and Brine Composition on the Mechanical Strength of Kansas Chalk. In: International Symposium of the Society of Core Analysts, Abu Dhabi, UAE, 29 October-2 November, SCA Paper SCA2008-55.
    [Google Scholar]
  13. Madland, M.V., Hiorth, A., Omdal, E., Megawati, M., Hildebrand-Habel, T., Kornes, R.I., Evje, S., and Cathles, L.
    [2011] Chemical Alterations Induced by Rock-Fluid Interactions When Injecting Brines in High Porosity Chalks. Transport in Porous Media, 87(3), 679–702.
    [Google Scholar]
  14. Megawati, M., Andersen, P.Ø., Korsnes, R.I., Evje, S., Hiorth, A., and Madland, M.V.
    [2011] The Effect of Aqueous Chemistry pH on the Time-Dependent Deformation Behaviour of Chalk Experimental and Modelling Study. In: Pore2Fluid International Conference, IFP Energies Nouvelles Paris (France), November 16–18.
    [Google Scholar]
  15. Megawati, M., Hiorth, A., and Madland, M.V.
    [2012] The Impact of Surface Charge on the Mechanical Behavior of High-Porosity Chalk. Journal of RockMechanics and Rock Engineering, 46(5), 1073–1090.
    [Google Scholar]
  16. Megawati, M., Madland, M.V., and Hiorth, A.
    [2015] Mechanical and Physical Behavior of High-Porosity Chalks Exposed to Chemical Perturbation. Journal of Petroleum Science and Engineering, 133, 313–327.
    [Google Scholar]
  17. Nermoen, A., Korsnes, R.I., Hiorth, A., and Madland, M.V.
    [2015a] Porosity and Permeability Development in Compacting Chalks During Flooding of Nonequilibrium Brines: Insights from Long-Term Experiment. Journal of Geophysical Research: Solid Earth, 120(5), 2935–2960.
    [Google Scholar]
  18. Nermoen, A., Korsnes, R.I., Fabricius, I.L., and Madland, M.V.
    , [2015b] Extending the Effective Stress Relation to Incorporate Electrostatic Effects. SEG Technical Program Expanded Abstracts 2015, 3239–3243. http://dx.doi.org/10.1190/segam2015-5891149.1
    [Google Scholar]
  19. Neveux, L., Grgic, D., Carpentier, C., Pirnon, J., Truche, L., and Girard, J.
    [2014a] Influence of Hydrocarbon Injection on the Compaction by Pressure Solution of a Carbonate Rock: An Experimental Study Under Triaxial Stresses. Marine and Petroleum Geology, 55, 282–294.
    [Google Scholar]
  20. Neveux, L., Grgic, D., Carpentier, C., Pironon, J., Truche, L., and Girard, J.
    [2014b] Experimental Simulation of Chemomechanical Processes During Deep Burial Diagenesis of Carbonate Rocks. Journal of Geophysical Research: Solid Earth, 119(2), 984–1007.
    [Google Scholar]
  21. Omdal, E., Madland, M.V., Kristiansen, T.G., Nagel, N.B., Korsnes, R.I., and Hiorth, A.
    [2010] Deformation Behavior of Chalk Studied Close to In Situ Reservoir Conditions. Rock Mechanics and Rock Engineering, 43(5), 557–580. http://dx.doi.org/10.1007/s00603-010-0087-4
    [Google Scholar]
  22. Rhett, D.W., and Teufel, L.W.
    [1992] Effect of Reservoir Stress Path on Compressibility and Permeability of Sandstones. In: 67th Annual Technical Conference and Exhibition of the Society of Petroleum Engineers, Washington, DC, USA, 4–7 October, SPE Paper 24756.
    [Google Scholar]
  23. Risnes, R.
    [2001] Deformation and Yield in High Porosity Chalks. Physics and Chemistry of the Earth (A), 26(1–2), 53–57.
    [Google Scholar]
  24. Risnes, R., Haghighi, H., Korsnes, R.I., and Natvik, O.
    [2003] Chalk-Fluid Interactions with Glycol and Brines. Tectonophysics, 370, 213–226.
    [Google Scholar]
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