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An Implicit Numerical Method for Simulation of Gas Production and Recycling in Gas-condensate Reservoirs Using a Two-phase Compositional Model

Asgari, Milad | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 47541 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Taghizadeh Manzari, Mehrdad
  7. Abstract:
  8. In this project, a response of a single well in a gas condensate reservoir has been investigated by compositional modeling and implicit numerical method. The most significant goals of this paper are as follows: 1- Examination of the flow produced in a gas condensate reservoir in constant pressure or mass rate. 2- Investigation of variables affecting the productivity of reservoir. 3- The study of effect of injection and gas cycling to the well on the production. A three-zone model has been used in this study as if there is only gas phase in the third and second zones. Condensation occurs since the pressure drops below the dewpoint pressure in the second zone; however, gas phase is only flowing because of low quality condensations. In the first zone including the well surrounding, both liquid phase and the gas one are flowing. In this project, the reservoir inside which the well has been modeled is radial and one-dimensional. Moreover, Radial and logarithmic meshing system has been used. The flow governing equations in gas condensate reservoir which are written based on compositional model have been discretized by finite difference method and then liberalized by Newton-Ralfson method. Also, the derived equations are solved by numerical methods and C++ as the programming software. Both PR and SRK as the equation of states have been used for different phase behaviors. Finally, injection and gas cycling as alternating production and injection from a well are studied
  9. Keywords:
  10. Gas Condensate Reservoirs ; Numerical Simulation ; Compositional Modeling ; Two Phase Flow ; Gas Recycling

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