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Investigation of Multiphase Flow in Oil Wells (with Focus on Two Phase Flow), Flow Pattern Recognition and Modeling

Shams, Reza | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48862 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Shad, Saeed; Jamshidi, Saeed
  7. Abstract:
  8. The concurrent flow of oil and water is a common occurrence in the field of multiphase flow in different fields including petroleum industry. In oil and gas, production engineers often face a situation in which more than one phase is flowing through the producers. In such conditions an accurate assessment of pressure loss inside the well plays a vital role in efficient and effective production planning. Changes in well orientation, wellbore diameter, reservoir and fluid properties as well as fluid flow rates are among parameters in which will affect the flow patterns that can occur inside a well during its life time. These flow patterns are created as a result of a competition between viscous, gravity and capillary forces. Due to the fact that the dominant forces vary for different flow regimes, the pressure drop will show a pattern dependent behavior. Unlike flow of gas and liquid inside a well, the liquid-liquid flow inside a horizontal well has received rather less attention. This study is aimed at not only determining a flow regime map for oil-water system in a realistic wellbore condition but also to develop a model that enables us accurately estimate the pressure drop inside a well under each flow regime. In addition, further analysis was conducted on a continuous droplet phase known as third continuous layer to characterize such flow regime by modeling the velocity of the droplets in this phase. Finally, the investigation of Newtonian and Non-Newtonian flow is considered. The results reveal that the traditional homogenous pressure drop model cannot be used to model pressure drop under different flow regimes. It was also found that despite similarities between different flow regimes observed in the past, a new flow pattern map was generated. Furthermore, the flow regime of oil, water mixed with polymer is different with the oil water flow
  9. Keywords:
  10. Pressure Drop ; Two Phase Flow ; Flow Patterns ; Fazzy Pattern Recognition ; Oil-Water-Polymer Flow ; Third Layer Velocity Modeling

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