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Wettability Alteration and its Effect on Oil Recovery by using Colloidal Nano-Silica in Oil Reservoirs

Sadatshojaie, Ali | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 56573 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Ayatollahi, Shahabodin; Goodarznia, Iraj; Badakhshan, Amir
  7. Abstract:
  8. As many oil fields are reaching their final stage of production, new technologies are required in order to maintain production and increase recovery of hydrocarbons. Among these techniques of enhanced oil recovery (EOR), chemical injection method focuses on increasing the effectiveness of waterflooding. Due to the relatively high costs and considerable adsorption on the rock formations, this method is no longer used. In Recent years nanofluids (nanoparticles dispersed in brine) have been used as a cheap, efficient and environmentally friendly alternative more than any other chemicals. It has been stated that the Smart Water method and enhanced oil recovery by SiO2 nanoparticles are effective on enhanced oil recovery. In this study, a series of contact angle experiments has been designed and carried out in order to investigate the combined effects of these two methods on the surface behavior of the crude oil / smart nanofluid / solid surface. The purpose of this thesis is to evaluate the effects of new smart nanofluids on different surfaces. In this study, we inspected several oil wet surfaces. Colloidal silica nanoparticles with the best possible size and the initial diameter of 8nm were used. The rate of wettability alteration for various surfaces that were soaked in smart nanofluid for different periods of time was evaluated. The experiments were performed in ambient conditions. The contact angles were measured in order to explain the underlying mechanisms of enhanced recovery
  9. Keywords:
  10. Colloidal Nanosilica ; Wettability ; Wettability Alteration ; Enhanced Oil Recovery ; Hydrofilicity ; Oil-Wet ; Smart Nanofluid

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