1-20 of 58
Keywords: accuracy
Close
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, March 28–30, 2023
Paper Number: SPE-212202-MS
... finite difference approach is adopted to improve the solution accuracy of the network. We apply the neural network to solve one synthetic 2D hydraulic-geomechanical problem. The pressure and stress fields predicted from our neural network are compared with the reference numerical solutions derived from...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, March 28–30, 2023
Paper Number: SPE-212213-MS
... Enhancing the accuracy of flow simulations on non-K-orthogonal grids has been an objective of a plethora of consistent discretization methods in the literature. Providing a review of extensive literature on consistent discretization methods is well beyond the scope of this paper. Rather, we focus...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, March 28–30, 2023
Paper Number: SPE-212212-MS
... implemented the BFGS quasi-Newton updating algorithm together with line-search and trust-region optimization strategies. We have developed a novel approach to enhance the accuracy of StoSAG gradients by modifying their formulations to enable exploiting the objective-function structure. The objective function...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, October 26, 2021
Paper Number: SPE-203965-MS
... high-dimensional space prediction jin neural network accuracy transition model implementation snapshot loss function state variable encoder timestep latent variable equation reduced-order model Introduction Reservoir simulators are the most widely used tools in reservoir...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, October 26, 2021
Paper Number: SPE-203901-MS
... it infeasible for field-scale applications. Traditional flow-based and static-based methods used to upscale detailed geological DFM to reservoir simulation model suffer from, to some extent, high computation cost and low accuracy, respectively. In this paper, we present a novel deep learning-based upscaling...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, October 26, 2021
Paper Number: SPE-203962-MS
... of flow-based upscaling is limited due to its high computational cost. In this work, we parametrize the fine-scale fracture geometries and assess the accuracy of several convolutional neural networks (CNNs) to learn the mapping between this parametrization and the DPDP model closures such as the upscaled...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, October 26, 2021
Paper Number: SPE-203959-MS
... This paper focuses on the study of capillary diffusion between fracture and matrix, which is critical in improving the numerical accuracy of fluid transport due to capillary force in a fractured system. The Hybrid Unwinding method (HU) was derived for multi-phase flow in the presence of viscous...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, October 26, 2021
Paper Number: SPE-204004-MS
... with the appropriate IPR significantly improves the run time of the coupled model while preserving the essential physics of the reservoir. The accuracy depends on the difference between the scenarios that the proxy is trained on and the scenarios being evaluated. Initial testing with a complex reservoir with more than...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, October 26, 2021
Paper Number: SPE-203976-MS
... history matching for subsurface flow modeling. flow in porous media neural network history matching upstream oil & gas artificial intelligence deep learning dimensionless time posterior distribution high-fidelity model workflow latin hypercube long-short term memory accuracy...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, April 10–11, 2019
Paper Number: SPE-193816-MS
... the benefits of the two approaches and hence significantly improves the efficiencies in both workflow construction and simulation accuracy. Our framework is based on the previously presented fully coupled network approach implemented as an in-house extension to a reservoir simulator. Here we extend...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, April 10–11, 2019
Paper Number: SPE-193817-MS
... for the saturation equation of two-phase flow in porous media in two space dimensions. The keys to high order accuracy are to use WENO reconstruction in space (which handles shocks and steep fronts) combined with a two-stage Radau-IIA Runge-Kutta time integrator. The saturation is approximated by its averages over...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, April 10–11, 2019
Paper Number: SPE-193822-MS
... with natural fractures and validating the accuracy and efficiency of the methodologies. The FMM-based simulation is extended to LGRs and EDFM. This requires novel gridding through introduction of triangles (in 2D) and tetrahedrons (in 2.5D) to link the local and global domain and solution of the Eikonal...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, April 10–11, 2019
Paper Number: SPE-193831-MS
... to arise independently of the interpolation method and the reduction process used. machine learning gas injection method approximation parameterization Artificial Intelligence Upstream Oil & Gas Simulation enhanced recovery reservoir simulation accuracy input parameter flow in porous...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, April 10–11, 2019
Paper Number: SPE-193891-MS
... that closely match an underlying high-fidelity model. Various types of simple flow diagnostics based on time-of-flight and volumetric well communication are used to predict the accuracy of the resulting reduced models. In this paper, we systematically apply this framework to the Great White Field, but also...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, February 20–22, 2017
Paper Number: SPE-182600-MS
..., resulting in computational savings and improvement in accuracy. TDEIM is further combined with the proper orthogonal decomposition (POD) method to provide an efficient POD-TDEIM framework. We test our new methodology on two examples, involving two-phase (water-oil) heterogeneous reservoir models. First...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, February 20–22, 2017
Paper Number: SPE-182616-MS
...) discretizations may offer several attractive features, especially for fluid flow in heterogeneous or fractured porous media. The objectives of this work are to develop a fully-implicit CCFV framework that could achieve second-order spatial accuracy on smooth solutions, while at the same time maintain robustness...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, February 20–22, 2017
Paper Number: SPE-182681-MS
... developed over the years for three different purposes: (i) to increase the accuracy of multiscale pressure solvers by defining grids that adapt to underlying features in a geo-cellular model Aarnes et al. (2006 , 2008 ); Natvig et al. (2011 , 2012 ); Alpak et al. (2012) ; (ii) to increase the accuracy...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, February 20–22, 2017
Paper Number: SPE-182664-MS
...) with the constraint of Ξ h . The order of accuracy Error Analysis of the Fixed-Stress Split (One-Pass Algorithm) A numerical discretization of a PDE is consistent if it converges to the true solution of the PDE as the truncation error (e.g. by Taylor series expansion) vanishes as a discretized (spatial...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, February 20–22, 2017
Paper Number: SPE-182695-MS
... to improving smoothness with respect to saturations and phase potentials, also improves the level of scalar nonlinearity and accuracy. C1-PPU involves a novel use of the flux limiter concept from the context of high-resolution methods, and allows a smooth variation between the co-current/counter-current flow...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, February 20–22, 2017
Paper Number: SPE-182677-MS
... ) and are, in a general way, based on the pioneering papers of Raithby (1976), Schneider and Raw (1986) , Colella (1990) and Tran et al . (2005) . Most of these schemes have first order of accuracy in space and are characterized by some multidimensional strategy that enhances the definition of the upwind direction...

Product(s) added to cart

Close Modal