Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
COMPARISON OF STRUCTURED CORNER POINT AND UNSTRUCTURED GRIDS FOR COMPOSITIONAL RESERVOIR SIMULATION
Submission Author:
Francisco Marcondes , CE
Co-Authors:
Marcelo Menezes Farias, Thiago Fraxe, Joaquim Bento Cavalcante Neto, Francisco Marcondes, Kamy Sepehrnoori
Presenter: Francisco Marcondes
doi://10.26678/ABCM.COBEM2019.COB2019-2381
Abstract
Approaches based on Corner Point grids used in commercial simulators neglect the cross terms that arises from the transformation from the physical domains to the computational domains. This approximation may lead to errors in mass flux calculation due to the cross terms influence in non-orthogonal grids. One approach to overcome this issue is the Element-based Finite Volume Method (EbFVM), which uses the finite volume method based on elements. This method is expected to be more accurate since it’s locally conservative. The main goal of the present work is to compare Corner Point grids and unstructured grids based on EbFVM to solve compositional multicomponent/multiphase flow in petroleum reservoirs. In order to compare both methods, the Corner Point grid must be preprocessed and converted into an unstructured grid to eliminate any hanging nodes that may exist. Both approaches are implemented in an in-house compositional simulator UTCOMP that has been developed at the University of Texas at Austin. The comparison of both methods will be performed in terms of oil, gas, and water production as well as error in material balance.
Keywords
Petroleum Reservoir Simulation, Element-based Finite Volume Method (EbFVM), Corner Point grids
