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Effect of Pore Size Distribution on Relative Permeability using Unsteady State Method Due to CO2 Injection

Abdollahi Atani, Abuzar | 2023

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 57040 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Masihi, Mohsen
  7. Abstract:
  8. The structure of a Pore and how The Pore and grains are distributed in it have a significant impact on the amount of fluid recovery and its production. In this research, the effect of the structure of the porous medium on the relative permeability curve and the amount of fluid recovery has been investigated, and 3 realistic, simplified and homogeneous models have been selected for this work. The simulation is that carbon dioxide gas is injected into an environment completely saturated with water. This work has been done in a water-loving environment and by examining three wettability levels of 30, 60 and 75. Simulation of fluid flow has been done in COMSOL software at the Pore scale. The results are that as the environment becomes more homogeneous and the structure of holes and grains becomes simpler, the amount of fluid recycling increases. It has also been observed that with increasing humidity, the breakthrough time also increases and carbon dioxide gas reaches the outlet of the environment for a longer time. With the increase in the complexity of the hole structure and grain size, the relative permeability of water increases, but the relative permeability of gas decreases. Of course, the relative permeability difference of two phases in 3 models is small. Also, with increasing wettability, the relative permeability of water increases, but the relative permeability of gas decreases in all 3 models
  9. Keywords:
  10. Pore Structure ; Relative Permeability ; Wettability ; COMSOL Software ; Fluid Recycling ; Carbon Dioxide Flooding

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