... simulation cell is used to extract and store the local conditional probabilities from a training image (TI). To generate a simulated sample, a random path is generated to sequentially visit all unsampled grid cells and draw conditional samples from the corresponding stored conditional probabilities. The grid...

... fracture reservoir simulation connection transmissibility areal interface scaling method grid cell cell thickness Durlofsky Scenario society of petroleum engineers Upstream Oil & Gas aggregate transmissibility aggregation case Introduction The application of unstructured...

... of the simulation, and are reused during the entire dynamic time-dependent simulation. For several heterogeneous test cases with complex fracture networks we show that, by employing only a fraction of the fine-scale grid cells, FG-ADM can accurately represent the complex flow-heat solutions in the fractured...

...-porosity model fracture network matrix medium MINC method subdivision grid cell matrix block fracture matrix permeability homogenized fracture medium matrix-fracture interaction transmissibility interaction hydraulic fracture matrix cell permeability Introduction Unconventional tight...

... the fine-grid cell. The lateral connectivities within the aquifer regions and between the aquifer and the reservoir are honored, inclusive of the fine-scale description of faults, pinchouts, and null cells. Reservoir regions are not coarsened. Two alternatives exist for the fine-scale pressure...

... to any arbitrary level, while honoring mass conservation after any multiscale finite volume stage. In order to maintain generality, it is shown that when each fracture network is modeled using a single coarse grid cell, our formulation automatically reduces to that proposed by Hajibeygi et al. (2011...

... acceleration using the preconditioned two-stage approach. linear system grid cell reduction preconditioner reservoir simulation discretization iteration matrix Modeling & Simulation algebraic multigrid weighted dr preconditioner saturation Upstream Oil & Gas dr method Stüben...

... these wells. Well branches and faults may intersect one another. Frequently, in order to honor multiple conflicting internal boundaries, grid congestion may occur which leads to small cells and/or poorly shaped grid cells. The method uses multi-level quad-tree method to achieve the desired resolution in areas...

... to develop a CVD-MPFA based multiscale formulation applicable to both structured and unstructured grids in two-dimensions. Artificial Intelligence spurious oscillation grid cell reservoir simulation compuational geoscience interface pressure scaling method Upstream Oil & Gas vertex...

... Artificial Intelligence Upstream Oil & Gas grid cell vector matrix grid finite element method inflow boundary spe 163593 tetrahedral grid reservoir simulation vertex MPFA method flux Denote equation concentration pressure equation Introduction Multiphase flow in porous media can...

... a linear system obtained from the full Jacobian. Then, we construct a directed graph with grid-cells as nodes and phase fluxes at grid-cell interfaces as edges, to identify the counter-current flow regions. After that, we employ a topological ordering that makes it possible to visit the components once...

... if they are at arbitrary angles. Furthermore, the presence of small grid cells in the LGR may lead to a situation where local fluid saturations change rapidly. This can result in a reduction in timestep size, thus increasing the simulation time. At worst, such rapid changes can result in convergence failures and numerical...

... the search from cell 1. At a particular grid cell, all its neighbors which have not been ordered are searched to locate the next grid cell which has the largest transmissibility with the current cell. Thus the MCG is the line of maximum connection factors through the unstructured or structured grids...

... so that after (possibly) a small bottleneck step that must be performed on one processor, the simulator uses all processors simultaneously. The relative size of the bottleneck step approaches zero as the number of grid cells increases. The implementation establishes parallelism through OpenMP calls...

... technique is based on the study of the kinetics of exchange between the fracture and matrix media. This study is performed on a single matrix block, supposed to be representative of the set of matrix blocks in a given matrix grid cell. We suppose that this block is initially saturated with a dead oil...

... show good agreement with the fine grid solution provided by Landmark using a parallel simulator. As models of tens of millions of grid cells are now solvable on a PC in an hour, this method is a feasible approach for achieving highly accurate upscaled models. This method is particularly appropriate...

... at the grid cell faces and make an initial guess to the mixture density at the next time step. For each cell proceeding from injector to producer do the following: Compute v D at the exiting face of the cell based on the mixture density, Update the total moles of each component in the cell from (8...

... simulation balanced realization nonlinear low-order model pod high-order model cell 1 grid cell identification low-order model upstream oil & gas subspace identification equation reservoir model artificial intelligence saturation response modal decomposition enhanced recovery production...

... numerical examples demonstrate the applicability of the proposed numerical method. equation reservoir simulation decomposition algorithm modeling & simulation upstream oil & gas composite grid grid cell intergrid operation scaling method iteration fac iteration mapping operation...

... Abstract New locally conservative flux continuous formulations are presented for general grids comprised of quadrilateral and or triangular grid cells. The schemes guarantee that a symmetric positive definite discretization matrix is obtained for both an arbitrary polygonal control-volume...