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Effect of Temperature, Wettability and Relative Permeability on Oil Recovery from Oil-wet Chalk

Author

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  • Aly A. Hamouda

    (Department of Petroleum Engineering, University of Stavanger, 4036 Stavanger, Norway)

  • Omid Karoussi

    (Department of Petroleum Engineering, University of Stavanger, 4036 Stavanger, Norway)

Abstract

It is customary, for convenience, to use relative permeability data produced at room temperature. This paper shows that this practice underestimates oil recovery rates and ultimate recovery from chalk rocks for high temperature reservoirs. Above a certain temperature (80°C in this work) a reduction of oil recovery was observed. The reduction in oil recovery is reflected by the shift of relative permeability data towards more oil-wet at high temperature (tested here 130°C). However, both IFT and contact angle measurements indicate an increase in water wetness as temperature increases, which contradict the results obtained by relative permeability experiments. This phenomenon may be explained based on the total interaction potential, which basically consists of van der Waals attractive and short-range Born repulsive and double layer electrostatic forces. The fluid/rock interactions is shown to be dominated by the repulsive forces above 80°C, hence increase fine detachment enhancing oil trapping. In other words the indicated oil wetness by relative permeability is misleading.

Suggested Citation

  • Aly A. Hamouda & Omid Karoussi, 2008. "Effect of Temperature, Wettability and Relative Permeability on Oil Recovery from Oil-wet Chalk," Energies, MDPI, vol. 1(1), pages 1-16, July.
    • Handle: RePEc:gam:jeners:v:1:y:2008:i:1:p:19-34:d:1792
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    Citations

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    Cited by:

    1. Alexey Dengaev & Vladimir Verbitsky & Olga Eremenko & Anna Novikova & Andrey Getalov & Boris Sargin, 2022. "Water-in-Oil Emulsions Separation Using a Controlled Multi-Frequency Acoustic Field at an Operating Facility," Energies, MDPI, vol. 15(17), pages 1-16, August.
    2. Saket Kumar & Sajjad Esmaeili & Hemanta Sarma & Brij Maini, 2020. "Can Effects of Temperature on Two-Phase Gas/Oil-Relative Permeabilities in Porous Media Be Ignored? A Critical Analysis," Energies, MDPI, vol. 13(13), pages 1-26, July.
    3. Ziabakhsh-Ganji, Zaman & Nick, Hamidreza M. & Donselaar, Marinus E. & Bruhn, David F., 2018. "Synergy potential for oil and geothermal energy exploitation," Applied Energy, Elsevier, vol. 212(C), pages 1433-1447.
    4. Sina Rezaei Gomari & Kamal Elyasi Gomari & Meez Islam & David Hughes, 2018. "New Insight into the Influence of Rhamnolipid Bio-Surfactant on the Carbonate Rock/Water/Oil Interaction at Elevated Temperature," Resources, MDPI, vol. 7(4), pages 1-12, November.

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