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Compositional Modeling of Surfactant Adsorption in Chemical Flooding with Verification with Laboratory Data

Khandan, Hossein | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45386 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Jamshidi, Saeed; Ghazanfari, Mohammad Hossein
  7. Abstract:
  8. One of the most important EOR methods in oil reservoirs is surfactant and polymer flooding. Surfactants cause decreasing in interfacial tension between oleic and aqueous phases. However, polymers give us efficient mobility control in displacing oil by increasing the viscosity of aqueous phase. Therefore, oil is displaced in aqueous phase by viscous forces.
    One of the most important challenges in surfactant flooding is adsorption. The net surface charge distributed on the rock surface depends strongly on pH. When we inject surfactant in reservoir, electrostatic charge on rock surface causes the first-layer adsorption. After that we have had second-layer adsorption.
    In this thesis we have simulated surfactant and polymer flooding. The model we have used compositional modeling that is more complicated and efficient in comparison with black-oil modeling. In this model the governing equations for microemulsion and oleic phases are solved numerically. The oleic phase in made up of two heavy hydrocarbon components and in the microemulsion phase we have water, surfactant, polymer and salt. We have used Longmuir isotherm. In the result section we have tested this model for two reservoirs and we have had accurate validation result by studying field data
  9. Keywords:
  10. Enhanced Oil Recovery ; Polymers ; Surfactants ; Absorption ; Compositional Modeling

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