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Petroleum Reservoir Simulation Using Combination Multi-scale Finite Volume Method and Streamline Method with Gravity Effects

Bordbar, Amir | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42428 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Taghizadeh Manzari, Mehrdad
  7. Abstract:
  8. In this thesis the oil reservoir simulation is carried out by using a combination of fast Multi-scale finite volume method and Streamline method considering gravity effects. In this simulation, the governing equations for incompressible fluid flow in porous media are solved using the IMPES (implicit pressure- explicit saturation) viewpoint. Multi- scale method is rapid (equivalent on coarse-scale methods) and accurate (equivalent on fine-scale methods) in solving the pressure field. Using the pressure field obtained through this way combined with Darcy equation make us able to extract the conservative velocity field. In this study, analytical and numerical Streamline methods are used to solve saturation equations. The basic idea of the Streamline method is to decouple the governing equation of fluid motion in a 2D problem into multiple 1D problems solved along streamlines. Then Saturation equation is solved along the streamline by defining “time of flight” variable. Having no restrictions in time step size selection in analytical solution of streamline makes this method a rapid and accurate one. Nevertheless inability in considering well management and gravity effects are the disadvantages of this type of solution. Therefore, in order to overcome these deficiencies the numerical solution is used. Numerical Solution is able to consider the reservoir condition (non-uniform initial condition). therefore, it's an appropriate method for considering gravity effects. For this purpose the operator splitting method is employed. Numerical solution along the streamlines is in explicit form. Hence, this method has restrictions on the time steps size and consequently the simulation speed is less than the analytical solution. Unlike the analytical solution, the numerical solution has many numerical diffusions. Finally, the combined method is made by combining Multi-scale finite volume method and the Streamline method. this method is faster and more accurate than traditional methods
  9. Keywords:
  10. Simulation of Oil Tanks ; Streamline Method ; Operator-Split Technique ; Multiscale Finite Volume Method ; Gravity Effect

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