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Experimental and Modeling Investigating of Foam Flow Behavior Stabilized by Nanoparticles in Porous Media

Shafiei, Yousef | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 50413 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Ghazanfari, Mohammad Hossein
  7. Abstract:
  8. Gas injection as an enhanced oil recovery (EOR) method usually suffers from low recovery efficiency. The low viscosity and density of gas as well as reservoir heterogeneity are the main reasons of early breakthrough and override of gas in oil reservoirs. To mitigate the poor sweep efficiency of gas injection, surfactants can be co-injected or injected in an alternating manner with gas to form foam within the reservoir rock. The foam formation can reduce the mobility of the injection fluids in porous media. A significant challenge of foam injection is the stability of the foam in formations and the foam liquid drainage rate is one of the key factors which characterize or show the efficiency of foam injection. A higher liquid drainage rate implies weak foam stability.In this study, at first the modeling of liquid drainage and the impact of different parameters such as surfactant concentration,presence of nano particles and monovalent salts on the liquid drainage rate and foam stability was investigated by using a population balance model. First, the distribution of foams bubbles size was experimentally determined and used an input for the population balance model. The population balance equations were solved numerically and the distribution of number density of foam bubbles as a function of time was obtained. Then, the liquid drainage rate was calculated using volume balance equations. The impact of concentration of surfactants, Nano-particles, and monovalent ions on the liquid drainage rate from foam and foam decay was investigated. The results of this study give an insight to the evaluation of foam stability for different solutions. At next step We present an insightful discussion on the implications of foam transport inside porous media based on an algorithm for the estimation of model parameters.A widely used texture-implicit local-equilibrium foam model, STAR commercial simular or, is used to describe the reduction of gas mobility in the state of foam with respect to free gas. Both the dry-out effect and shear dependent rheology are considered in foam simulations.at last the effects of different factors such as surfactant concentration,presence of nano particles and polymers on foam mobility are discussed
  9. Keywords:
  10. Modeling ; Foam Stability ; Population Balance ; Porous Media ; Nanoparticles ; Implicit Texture

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