PetraSim 2026: TOUGH2 Reservoir Simulation Interface

PetraSim 2026 is the latest version of RockWare’s graphical interface for the TOUGH2 family of simulators, used for modeling non-isothermal multiphase flow and transport in fractured and porous media . This release introduces expanded 3D export tools, enhanced Petrel import, and a new simulation option for improved convergence.

Key New Features in Version 2026

Updated 3D Result Export Tools

The export menu has been reorganized and expanded with new VTU options :

  • File | Export Tec Scalar: New menu added for TEC scalar exports.

  • File | Export VTU Scalars: Exports cell-based result data for the selected time step to VTU files for use in third-party programs such as TecPlot and ParaView.

  • File | Export VTU Vectors: Exports vector-based result data as VTU files.

  • Polygonal Mesh Support: VTU files can be exported as either polyhedral or wedge formats for improved compatibility with third-party platforms.

  • Simplified Data Export: The File | Export Data menu is now used exclusively for ASCII formats such as CSV and TXT.

Enhanced Petrel Import

The Petrel import has been enhanced to populate the Permeability Modifier field for individual cells based on the Petrel PERM or PERMX keyword .

New Saturation-Weighted Phase Density Option

A new saturation-weighted phase density option has been added for gravity-term calculations in Darcy’s law. Enabled with FE(8) = -1, this method provides smoother density variation during phase transitions and may improve simulation convergence. It supports TOUGH2 EOS modules including EOS2, EWASG, and ECO2N .

Installer Improvement

The PetraSim v2026 installer now includes an option to launch the application after installation, enabled by default .

Core Capabilities

PetraSim serves as the graphical interface for the TOUGH2 family of simulators, used to solve problems related to geothermal systems, carbon sequestration, and multiphase contaminant transport . It enables users to quickly import CAD models and create high-quality animations from simulation results .

petrasim 2026 download
petrasim 2026 download