Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
ADAPTIVE IMPLICIT METHOD APPLIED TO COMPOSITIONAL RESERVOIR SIMULATION USING UNSTRUCTURED GRIDS
Submission Author:
Francisco Marcondes , CE
Co-Authors:
Edilson Drumond, Francisco Marcondes, Bruno Ramon Fernandes, Kamy Sepehrnoori
Presenter: Francisco Marcondes
doi://10.26678/ABCM.COBEM2019.COB2019-2380
Abstract
The modern oil production industry relies heavily on increasingly accurate and fast reservoir simulators. Adaptive implicit methods have, in this context, become very popular based on their ability to optimize performance by reducing the implicitness level and CPU memory usage of simulation runs. This is achieved by constantly identifying sources of numerical instability and applying the required level of implicitness in these regions, while keeping the remainder of the reservoir computed explicitly. Therefore, the main goal of the AIM approach is to reduce the size of the linear systems, but keeping the ability to reproduce the stability of the FI models, while outperforming them in terms of computational time and memory. In this work, the AIM approach is applied to compositional reservoir simulation using unstructured grids in conjunction with the Element-based Finite Volume Method (EbFVM). The results are shown in terms of saturations fields and production curves. For computational performance CPU time, time step size, and average level of implicitness are compared. The data shows relevant performance improvement without compromising the accuracy of the results.
Keywords
Compositional reservoir simulation, adaptive implicit method, EbFVM, unstructured grids
