... simulations. This framework allows conducting the history matching of practical industrial applications using the gradient descent method with considerable model control variables in a reasonable time. Generally, the inverse modeling of industrial applications involves large amounts of gradient calculations...

... free energy, and the corresponding energy surface will not be influenced by the pressure inequality between the liquid and vapor phases. We tested our algorithm on several fluids with different pore radii over a wide range of temperatures and total volumes, and no single calculation breakdown occurred...

..., maintainable code with applicability across a wide range of models. Different parts of a reservoir simulator benefit from different approaches. A modern, object-oriented simulator requires components to handle initialization, property calculation, linearization, linear solver, well and aquifer calculations...

... Abstract In composition reservoir simulation, fluid phase behavior is determined by vapor-liquid equilibrium (VLE) calculations. VLE calculations can consume more than half of the CPU time of compositional reservoir simulations. To accelerate the VLE calculations, machine learning (ML...

... and the flash calculations by minimizing the Helmholtz free energy using the Peng-Robinson equation of state at a fixed temperature, pore volume, and overall composition. The simulator is applied to model CO 2 injection into a 1-D tight porous medium with a ternary mixture of methane, n-butane, and n-decane...

... in each wellbore control volume. (7) ∑ i = 1 n c z i = 1 Friction factor calculation The generalized friction factor method for multi-phase flow is used to model the wellbore friction pressure drop in the momentum conservation equation and is shown in Eq...

... learning reservoir simulator workflow equation of state enhanced recovery envelope heidemann neural network composition calculation prediction fluid dynamics reservoir simulation artificial intelligence simulator algorithm accuracy fraction classifier iteration li-correlation khalil...

... kernels have been designed and implemented to honor the GPU single insruction, multiple data (SIMD) programming paradigm. These kernels include physical property calculations, phase equilibrium computations, Jacobian construction, linear and nonlinear solvers, and wells. Novel techniques are devised...

... Linearization (OBL) modelling technique allowing for a combination of multiple complex physics in the nonlinear solution of governing equations. This is the first implementation of three-phase flash calculations for hydrocarbons and brines based on fugacity-activity models coupled with an advanced highly...

... Abstract Equation-of-state (EOS) compositional simulation is commonly used to model the interplay between phase behavior and fluid flow for various reservoir and surface processes. Because of its computational cost, however, there is a critical need for efficient phase-behavior calculations...

... as much computations to GPU as possible. Our CUDA implementation covers all reservoir computes, which include property calculation, linearization, linear solver, etc. The well and Field Management still reside on CPU and need minor changes for their interaction with GPU-based reservoir. Importantly...

... boundary condition flux reservoir characterization upstream oil & gas tensor vector reservoir simulation calculation coefficient tchelepi reservoir geomechanics approximation tangential projection application terekhov equation matrix grid gradient interface Introduction...

... Abstract Robust and efficient multiphase flash calculations are crucial in compositional and thermal simulations for complex fluid systems in which three or four phase may co-exist. Solution of the Richford-Rice (RR) equations is an important operation in the multiphase flash. The Newton method...

... Abstract Compositional simulators conventionally use Li's correlation to approximate the critical temperature ( T c ) of hydrocarbon mixtures, used to arbitrarily label them as ‘gas’ or ‘oil’ outside the two-phase (gas/oil) envelope. T c also feeds into the calculation of hydrocarbon...

... Abstract In this work, we present the development of a compositional simulator accelerated by proxy flash calculation. We aim to speed up the compositional modeling of unconventional formations by stochastic training. We first developed a standalone vapor-liquid flash calculation module...

... during CO2-EOR in conventional and unconventional reservoirs. In our method, the governing equations of the multiphysical processes are solved fully coupled on the same unstructured grid. A multiscale algebraic linear solver is adopted to speed up the non-isothermal flow calculation. Inspired...

.... The new stability procedure is coupled with calculations of the phase behavior. The significance and robustness of the new method is shown in several examples with realistic tight oil and gas-condensate mixtures. Upstream Oil & Gas complex reservoir gas-condensate mixture PVT measurement...

... simulation interpolation Voskov physics geothermal model calculation parameter space Modeling & Simulation architecture operator Upstream Oil & Gas discretization simulator operator value equation physical state linearization society of petroleum engineers khait formulation...

... Abstract EOS-based phase equilibrium calculations are usually used in compositional simulation to have accurate phase behaviour. Phase equilibrium calculations include two parts: phase stability tests and phase splitting calculations. Since the conventional methods for phase equilibrium...

... 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...