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Adsorption and Surfactant Transport in Porous Media

Adsorption and Surfactant Transport in Porous Media. Shunhua Liu George J. Hirasaki Clarence A. Miller 06.04.2005. Outline. Surfactant Adsorption Test the effect of different potential determining ions Test the nonionic surfactant Test the new surfactant ( N67-7PO: IOS=4:1)

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Adsorption and Surfactant Transport in Porous Media

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  1. Adsorption and Surfactant Transport in Porous Media Shunhua Liu George J. Hirasaki Clarence A. Miller 06.04.2005

  2. Outline • Surfactant Adsorption • Test the effect of different potential determining ions • Test the nonionic surfactant • Test the new surfactant (N67-7PO: IOS=4:1) • The transportation of two surfactants in porous media • Background • Propagation of the two surfactants

  3. Adsorption of Anionic Surfactant (CS330+TDA-4PO 1:1 Blend) with Different Potential Determining Ions on DOLOMITE Powder

  4. 40 20 0 -20 Zeta Potential, mv -40 -60 -80 0 2 4 6 8 10 12 pH MY1/Brine Calcite/Brine Calcite/Na2CO3/NaHCO3 Zeta Potential at Interfaces

  5. Comparisons of Anionic Surfactant (CS330+TDA-4PO 1:1) and Nonionic Surfactant (Nonylphenol-12EO-3PO) Adsorption on DOLOMITE Powder

  6. Comparisons of Anionic Surfactant (CS330) and Nonionic Surfactant (Nonylphenol-12EO-3PO) Adsorption on SILICA Powder

  7. Absorption Threshold Measurement for Na2CO3 Same Initial surfactant concentration 0.05% Same Solid Liquid Ratio(10:1)

  8. Outline • Surfactant Adsorption • Test the effect of different potential determining ions • Test the nonionic surfactant • Test the new surfactant (N67-7PO: IOS=4:1) • The transportation of two surfactants in porous media • Background • Propagation of the two surfactants

  9. Background for two surfactants system Concentration in oleic phase Partition Coefficient = Concentration in aqueous phase • Natural Soap (Naphthenic Acid+Alkali) • A hydrophobic surfactant • Initial condition for our system Two Surfactants • Synthetic surfactant • A hydrophilic surfactant • Boundary condition for our system where KCi is the partition coefficient of i component ci1 is the concentration in aqueous phase ci2 is the concentration in oleic phase i=3 for synthetic surfactant; i=4 for natural soap e.g.

  10. The effect of two surfactants Optimal Salinity vs. Soap-Synthetic Surfactant Ratio Curve

  11. Type II Region (%NaCl) Type III Region Type I Region 10-1 10-2 10-3 Contour of IFT (log10(IFT))

  12. Residual Phase Saturation Curve Capillary Number Nc IFT=10-2 IFT=10-3 Ref: L. W. Lake Enhanced Oil Recovery Prentice-Hall, New Jersey,1989

  13. Contour of Partition Coefficient (log10(K)) K>>1 K<<1

  14. Langmuir type isotherm 1.2 C max 1 0.8 C3ads 0.6 0.4 K 0.2 0 c31 0 5 10 15 20 Adsorption of Synthetic Surfactant

  15. Base Case Parameters Sor=0.3 Oil Viscosity: 8cp Formation brine:4.8%NaCl Soap Concentration: c42=510-4, C4=1.5 10-4 NX=100 Surfactant Concentration:1 10-3(~0.1%) Slug Size:0.3PV Aqueous phase viscosity: 15 cp Keep the salinity fixed

  16. Base Case Effluent History

  17. Base Case Surfactants’ Profiles

  18. Base Case IFT and Soap Surfactant Ratio Profiles

  19. Base Case Oil Profiles

  20. Parameter Study (Salinity)

  21. Parameter Study (Salinity) Salinity=1.0% At t=0.5PV Base Case (Salinity=4.8%) Salinity=5.5%

  22. Parameter Study (Aqueous phase viscosity)

  23. Parameter Study (Aqueous phase viscosity) At t=0.5PV Base Case (Viscosity=15cp) (Viscosity=1cp)

  24. Parameter Study (NX)

  25. Conclusion • CO3-2 can be used to reduce the adsorption of anionic surfactant on carbonate formation. The threshold is around 0.08% Na2CO3. • When surfactant and natural soap propagate together, we can make the Winsor type II region ahead of the surfactant front and make the type I region behind the front. • The low IFT region will increase as the surfactant and soap propagate. • By manipulating the operational parameters, We can take advantage of the existence of soap and make the low tension region wide enough for recovering all the oil. The usage of surfactant could be very small.

  26. Future Work • Add the polymer term to control the viscosity • Add the alkali term to describe the generation of soap • Find an economic strategy by using the simulator • Flooding experiments for the history match.

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