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Development of a 2-Phase, Heterogeneous and Miscible Reservoir Simulator Using Control Volume Based Finite Element Method (CVFEM)

Charkhtab Basim, Mehdi | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 49256 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Pishvayi, Mahmoud Reza; Masihi, Mohsen
  7. Abstract:
  8. During the last two decades usage of unstructured grids was very common in the oil reservoir simulators; which is due to free formulation’s structure and independence of the grids to any special boundary lines or surfaces. The use of these types of grids in Computational Fluid Dynamics texts is widely seen in form of Control Volume discretization techniques; and on the other side, Weighted Integral methods known as Galerkin Finite Elements are one of popular methods to approximate displacement differentials quantities. In this study we tried to review application of a new numerical calculation method – which is a combination of Finite Elements and Control Volume methods – in simulation of oil reservoirs and may suggest ways to improve and increase the accuracy of the method. CVFEM is using Finite Volume method in non-structured gridding whereas Finite Elements formulations control the numerical accuracy and flow calculations. Due to complexity of utilizing non-structured triangular grids in the formulations, crossborder flow calculations have been performed in element’s bounding lines, which is easier and increase calculation speed. The method used in this study leeds to more accurate modeling of the natural barriers inside the reservoir; also it has very descriptive coordination with simulation of anisotropic and heterogeneous reservoirs and such complex types of permeability can be simply enter the calculations. The method of storing permeability values in this project is in a way that there is no need for averaging the permeability of two adjacent control volumes at the point of integration which is much easier to model anisotropic permeability
  9. Keywords:
  10. Numerical Simulation ; Control Volume Based Finite Element Method ; Unstructured Network ; Heterogeneous Reservoirs ; Anisotropic Reservoirs ; Simulation of Oil Tanks

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