Analysis of Entropy as Numerical Error Indicator in Reservoir Simulation

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Hamidian Shoormasti, Nima | 2009

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 39456 (06)
University: Sharif University of Technology
Department: Chemical and Petroleum Engineering
Advisor(s): Ghotbi, Cyrus; Razvan, Mohammad Reza
Abstract:
Reservoir simulation models are profound tools in reservoir management. Number of grid blocks in a simulation model is much less than the number of grid blocks in geological model, therefore geological model must become upscaled in order to construct simulation model with convenient dimensions. This causes loosing of some details and introduces errors due to discretization and homogenization. One method of construction of an efficient computational grid is use of adaptive mesh refinement (AMR) methods. These methods refine computational grid in regions needing further resolution. An error indicator is used for determining regions candidate for refinement or coarsening. In present study entropy generation rate is used as error indicator. This indicator has been analyzed in one-phase and two-phase cases. In the next step feasibility of usage of this indicator in in-situ combustion process is investigated as a non-isothermal case. Results have shown that in addition to ease of implementation, this indicator truly points regions susceptible to more error
Keywords:
Entropy Generation ; Upscaling ; Error Indicator Parameters ; Adaptive Mesh Refinement ; In-Situ Combustion ; Reservior Simulation

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