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  1. تأثیر سیلاب‌ زنی بر روی خواص سنگی مخازن شکافدار با تمرکز بر روی بر هم کنش‌ های بین محیط ماتریس و شکاف

Investigation of the Effect of on Rock Properties of Fractured Media with Focus on Interactions between the Matrix and Fracture During Water Flooding

Rezaei, Parsa | 2024

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 57254 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Masihi, Mohsen
  7. Abstract:
  8. Fractured reservoirs are important due to having a significant volume of oil and gas in Iran and the world. With passing half of the life of Iran's reservoirs, we see pressure drop and decreasing in production rate at them. For this purpose, the maximum production of this type of reservoirs requires using methods of enhanced recovery. Among these methods, water-flooding method is one of the most common and widely used methods, which is effective in increasing the recovery rate of the reservoir. Studies in this field are divided into two parts: laboratory and simulation. Although the enhanced recovery methods are carried out at the field scale, the fluid movement mechanisms inside the reservoir and the parameters affecting it are investigated at the pore scale. The aim of present study is to investigate the characteristics of the fractured environment and the fluids in it with focusing on the interactions between the matrix environment and the fracture. For this reason, from a micro CT image taken from a two-dimensional section of the stone, the considered base environment will be extracted and then fractures will be added to it. Then the two-phase flow of water and oil is simulated using the equations of the phase field method and COMSOL software. Finally, the effect of factors such as the size, direction, number and surface roughness of the fractures on the dynamic properties such as the relative permeability of the phases and the capillary pressure of the medium will be investigated. Also, the oil recovery coefficient in the mentioned models is compared. One of the most important results obtained is the increase in the values of capillary pressure, relative permeability of phases and oil recovery coefficient with the increase in the width of fractures. Also, with the increase in the number of fractures, the values of capillary pressure and oil recovery coefficient will be increased. The roughness of the fracture surface also reduces the relative permeability values of the phases and the coefficient of oil recovery
  9. Keywords:
  10. Relative Permeability ; Capillary Pressure ; Fractured Reservoirs ; Water Flooding ; Matrix-Fracture Interaction

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