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Keywords: mesh
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Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, October 26, 2021
Paper Number: SPE-203949-MS
... Abstract Solving the equations governing multiphase flow in geological formations involves the generation of a mesh that faithfully represents the structure of the porous medium. This challenging mesh generation task can be greatly simplified by the use of unstructured (tetrahedral) grids...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, October 26, 2021
Paper Number: SPE-203908-MS
... Abstract An unstructured grid generation method is presented that automates control-volume boundary alignment to geological objects and control point alignment to complex wells. The grid generation method is coupled with an iterative acute mesh reconstruction technique, to construct essentially...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, October 26, 2021
Paper Number: SPE-203957-MS
... are presented for two phase flow problems on 2D unstructured meshes including fractures. The results demonstrate that the spectral-volume method achieves further enhanced resolution of flow and fronts in addition to that of achieved by the standard higher resolution method over first order upwind, while...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, October 26, 2021
Paper Number: SPE-203998-MS
... media bilinear form artificial intelligence fluid dynamics boundary condition application mvem polynomial reservoir characterization beirao da veiga freedom virtual element method upstream oil & gas mesh geometry fumagalli interface Introduction The simulation of underground...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, April 10–11, 2019
Paper Number: SPE-193817-MS
... on general unstructured computational meshes. Some slope limiting procedure is required to limit the oscillation. WENO methods have a slope limiting procedure based on reduction to lower order methods, which generally satisfy the maximum principle better (at the expense of adding numerical diffusion...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, April 10–11, 2019
Paper Number: SPE-193875-MS
... for tracer and two phase flow problems on 2D unstructured meshes including fractures. The results demonstrate that the spectral-volume method achieves further enhanced resolution of flow and fronts in addition to that of achieved by the standard higher resolution method over first order upwind, while...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, April 10–11, 2019
Paper Number: SPE-193862-MS
... acidizing in fractured carbonate reservoirs. We adopt a two-scale continuum model for the acid transport. The coupled flow and reactive transport systems are spatially discretized by EG methods. Fractures are introduced using local grid refinement (LGR) technique. Adaptive mesh refinement (AMR...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, April 10–11, 2019
Paper Number: SPE-193874-MS
... ; Aavatsmark et al., 1998 ; Wheeler, 2006 ; Lee et al., 1998 ), and cell-vertex (dual-mesh) CVD-MPFA schemes are presented in ( Edwards and Zheng, 2010 , 2011a , b ). Common to all of these schemes, a piecewise constant representation of flow and rock properties is assigned to control-volumes, and flow...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, April 10–11, 2019
Paper Number: SPE-193927-MS
... grid triangulation edwards mesh nonphysical oscillation permeability tensor Introduction Anisotropy favoring triangulation ( Mlacnik and Durlofsky, 2006 ; Pal and Edwards, 2010 ) parametric surface meshing ( George and Borouchaki, 1998 ); finite element computations where flow fields...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, February 20–22, 2017
Paper Number: SPE-182635-MS
... reservoir models are discretized using fully unstructured 3D meshes where the grid conforms to the reservoir geometry. This paper presents a new and computationally efficient numerical scheme that enables flow diagnostic calculations on fully unstructured grids. Time-of-flight and steady-state tracer...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, February 20–22, 2017
Paper Number: SPE-182636-MS
... diffusion dominates numerical diffusion to obtain converged solutions. This typically requires the use of high mesh resolution and high order numerical methods. This is computationally expensive, particularly in 3D. We use IC-FERST, a novel control volume finite element (CVFE) code that uses dynamic mesh...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, February 20–22, 2017
Paper Number: SPE-182616-MS
... and nonlinear convergence performance. We develop a novel multislope MUSCL method which interpolates the required values at the edge centroids in a simpler way by taking advantage of some geometric features of the triangular mesh. Through the edge centroids, the numerical diffusion caused by mesh skewness...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, February 20–22, 2017
Paper Number: SPE-182647-MS
... Finite Element Method. The latter, as many other formulations, have problems to calculate the pressure field when the elements conforming the mesh, triangles (2D) or tetrahedra (3D), have very obtuse angles. This limits the advantages that can be obtained by using dynamic adaptive meshing methods...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, February 20–22, 2017
Paper Number: SPE-182677-MS
.... Besides, for problems with distorted meshes, the proposed formulation takes into account the angular distortion of the computational mesh by means of an adaptive weight, that tunes the multidimensional character of the formulation according to the grid distortion. This strategy diminishes the occurrence...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Symposium, February 23–25, 2015
Paper Number: SPE-173191-MS
... To illustrate the impact that the near-fracture mesh spacing can have on computed well performance, a model was created to represent a single element of a hydraulic fracture draining 400 ft of a 100-nD reservoir. The initial reservoir pressure was 9,944 psi, and the fracture pressure was held...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Symposium, February 23–25, 2015
Paper Number: SPE-173309-MS
... methods on unstructured PEBI grids. The two first test cases are academic models and the third one is a field model. Modeling & Simulation tetrahedral mesh vertex Upstream Oil & Gas reservoir simulator tpfa method Artificial Intelligence cell centre discretization mpfa-o method...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Symposium, February 23–25, 2015
Paper Number: SPE-173319-MS
... Abstract We present a method for porous media flow in the presence of complex fracture networks. The approach uses the Mimetic Finite Difference method (MFD) and takes advantage of MFD's ability to solve over a general set of polyhedral cells. This flexibility is used to mesh fracture...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Symposium, February 23–25, 2015
Paper Number: SPE-173312-MS
... lower-dimensional fracture model matrix cell fracture complex reservoir transfer function mesh fracture cell equation Upstream Oil & Gas approximation permeability fracture model fracture network formulation cvd-mpfa formulation Introduction Understanding of fluid flow through...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Symposium, February 23–25, 2015
Paper Number: SPE-173279-MS
... efficient simulation of flow in highly heterogeneous models. Moreover, in conjunction with dynamic mesh optimization, in which the mesh adapts in space and time to key solution fields such as pressure, velocity or saturation whilst honoring a surface-based representation of the underlying geologic...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Symposium, February 23–25, 2015
Paper Number: SPE-173313-MS
... a tetrahedral mesh contains approximately between 5 and 6 times as many cells (tets) as there are vertices, making a cell-vertex approximation the optimal choice on unstructured grids. However, the cell-vertex approximation (dual) control-volumes must be constructed around primal grid vertices. The dual grid...

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