FLOW (reservoir simulator)

OPM Flow is a fully-implicit, black-oil simulator capable of running industry-standard simulation models. The simulator is implemented using automatic differentiation to enable rapid development of new fluid models.

Model formulation:

• black-oil with dissolved gas and vaporized oil
• rock-dependent capillary and relative-permeability curves
• end-point scaling and hysteresis
• oil vaporization controls (VAPPARS)

EOR options:

• Todd-Longstaff type polymer model with adsorption, dead-pore space, permeability reduction, and shear effects (Flow-polymer)
• extra component equation(s), such as a solvent model (Flow-solvent)

Description of geology:

• rectilinear and fully-unstructured grid
• corner-point grids from Eclipse input, including fault and region multipliers, minpv/pinch, etc

Wells and controls:

• bottom-hole pressure and surface/reservoir rate
• group controls
• shut/stop/open individual completions
• history-matching wells

Input/output:

• general reader/parser for Eclipse input decks
• XML-based or simple text-format input of additional parameters
• flexible output of summary and restart files in Eclipse format
• logging to terminal and print file

Simulation technology:

• fully-implicit in time
• two-point flux approximation in space with upstream-mobility weighting
• flexible assembly through the use of automatic differentiation
• block-structured linear solver with ILU0 preconditioner
• CPR preconditioner and multigrid solver
• adaptive step-size controls

Links

Homepage: https://opm-project.org/?page_id=19
Documentation: https://opm-project.org/?page_id=955
Tutorial https://opm-project.org/?page_id=197