... global upscaling technique. The accuracy of the method is illustrated by two numerical models. All the procedures are designed and carried out under structured grids and EDFM discretization techniques to avoid complex unstructured gridding, which guarantees the applicability of the method. Local grid...

..., there are many differences between our workflows and these authors beside the procedures for computing gradients. First, we use a novel line-search procedure in the SQP algorithm, which is referred to here as the line-search sequential quadratic programming (LS-SQP). We also introduce another variant called...

...), are applied and assessed. The various constraints are treated using a preprocessing repair procedure, penalty functions, and a filter method. The framework utilizes multifidelity optimization, in which increasing levels of grid resolution are applied during the course of the optimization run...

... dimension convx1 architecture procedure reconstruction implementation petroleum science Introduction Ensemble data assimilation methods are becoming industry standards in history-matching applications because their stability, fast convergence, and scalability for large-scale problems. Among...

... linear system mass rate reservoir simulation small cell computation phase mass rate small cell 0 modeling & simulation upstream oil & gas flow rate procedure pressure basis pressure value newton iteration bulk cell flow in porous media fluid dynamics spe reservoir simulation...

... reference solution detailed dfm implementation train-validation sample dual-porosity model fine-scale solution fracture dfm coarse block fractured reservoir setup parameter geological dfm cnn model petroleum engineer accuracy training-validating process procedure transmissibility dataset...

... Abstract The use of deep-learning-based procedures for geological parameterization and fast surrogate flow modeling may enable the application of rigorous history matching algorithms that were previously considered impractical. In this study we incorporate such methods – specifically...

... ratio timestep case 2 locality equation of state fluid dynamics prediction convergence behavior fracture network iteration iterate newton method computation solution summary timestep localization method unconventional reservoir active domain convergence performance procedure fracture...

... detailed reservoir models, which impact the computational cost. We provide a practical and general upscaling procedure to guide a robust selection of the upscaling approaches considering the nature and limitations of each reservoir model, exploring the differences between the upscaling of immiscible...

... substantially better prediction results when strong nonlinearity exists. Systematic sensitivity studies have shown that the improvement is most dramatic when the number of training samples is large and the data errors are small. The proposed nonlinear simulation-regression procedure naturally incorporates data...

...-squares Petrov-Galerkin procedure, which has been shown to maintain numerical stability in POD-TPWL models. The states and derivative matrices required by POD-TPWL, generated by an extended version of Stanford's Automatic-Differentiation-based General Purpose Research Simulator, are provided in an offline...

... demonstrate that substantial uncertainty reduction is achieved in all cases considered, and that the multilevel strategy is effective in reducing the number of simulations required. It is important to note that the parameterizations discussed here can be used with a wide range of history matching procedures...

... uses a single input parameter to obtain a suitable compromise between fine-grid cell quality and the fidelity of the fracture representation. Discretization using a two-point flux approximation is accomplished with an existing procedure that treats fractures as lower-dimensional entities (i.e...

... Abstract A new methodology for the joint optimization of economic project life and time-varying well controls is introduced. The procedure enables the maximization of net present value (NPV) subject to satisfaction of a specified modified internal rate of return. Use of this framework allows...

... testing time resolution well planning Upstream Oil & Gas reservoir simulation resolution deviation procedure pressure field slant angle Voronoi Grid geometry transmissibility unstructured grid consistency well index value grid log-log plot module fine grid wellbore Introduction...

... an efficient parallel implementation procedure as to how to enrich a given multiscale formulation with additional local basis functions. These additional basis functions, constructed in parallel computational platform, aim to resolve large error components for a generic fine-scale system with no right-hand...

... modified version of a new ensemble-based optimization algorithm known as StoSAG (stochastic simplex approximate gradient). We analyzed the inferiority of the simultaneous optimization using the StoSAG method compared to the sequential optimization scheme and proposed an iterative simultaneous procedure...

... In this section we present the optimization problems considered in this work. The PSO–MADS procedure is then described. The treatment of nonlinear constraints for multiple-realization cases is also discussed. We now briefly describe the MADS and PSO methods, and then discuss how...

... compositional upscaling procedure developed here is applied within an ‘ensemble level upscaling’ framework for efficient uncertainty quantification. The methodology introduced in that paper entails the reuse of upscaled functions (computed by global compositional simulation) in new geological realizations...

..., full tensor permeabilities are computed using a fast flow-based upscaling procedure taking advantage of a multipoint flux approximation method. A novel iterative quasi-global pseudoization method is used in the genetic-unit to reservoir scale upscaling process. The fundamental idea of iterative...