Rock Flow Dynamics Unveils Latest Version of tNavigator

14 07 | 23

Rock Flow Dynamics (RFD) is pleased to announce the release of the latest version of our flagship product, tNavigator. Version 23.2 is now available to users.

tNavigator has long been recognized as a powerful tool for reservoir engineers and geologists, providing accurate modeling and simulation of complex reservoir behavior. The latest version brings significant advancements to all modules, enhancing the overall capabilities of the software.

Updates and improvements affected the Simulator kernel and GUI, AHM and Uncertainty module, Geology and Model Designer, Seismic, Fracture Simulator, Network, Well and PVT Designer, Material Balance Analyzer, and also in a part of Resource sharing.

Key new features in 23.2:

Simulator kernel:

  • Calculation on NVIDIA Hopper graphic cards is now supported. It uses CUDA® 11.8, which does not require driver updates, according to the manufacturer’s statement.
  • For compositional models in E3 format with the CO2STORE option, it is now possible to use different models of activity coefficients to take into account the influence of salts on CO2 dissolution in water.
  • For compositional models, the Spycher and Pruess model can be used to model CO2 dissolution in water.
  • A new equation of state is now supported: CPA-SRK. It allows describing systems with strong self-association, in particular, gas hydrates in the reservoir.
  • The Hysteretic Rock Compaction option (ROCKTABH) can now be used for thermal models.

Simulator GUI:

  • A new setting has been added to automatically run Graph Calculator scripts after the model calculation is completed.

Assisted History Matching and Uncertainty:

  • It is now possible to have the influence of variables on objects localized by user-defined regions.

Geology Designer:

  • The line style of well trajectories in the 2D and Cross-Section windows can now be set up manually or depending on their distance from the cross-section plane.
  • A new object titled “Well Numeric Info” has been added to the tNavigator project tree to store time-dependent information on wells.
  • A new object has been added: Dips. It stores information about the azimuth, dip angle, and 3D coordinates of a dip not associated with any well, unlike Well Dips. Dips can be visualized on the 2D and 3D tabs, imported/exported in various formats, modified with Dips Calculator, etc.
  • A new calculation for horizon creation has been added: Horizon by Contour Lines. Contour lines can be represented by point sets or (and) polygons.


  • When ZGY files or 2D seismic data are imported, they can be assigned a coordinate reference system (CRS) which is different from the project CRS.

Model Designer:

  • Several variants of correlation parameters for relative permeabilities (RP) may now be multiedited.
  • PVT variants may now be created using correlations and edited.
  • IPR curves may now be created and modified.
  • It is now possible to create a Stacked Plot in Graph Templates.

Fracture Simulator:

  • Tubing specification and perforation intervals from Well Designer can now be used in Fracture Simulator.

Network Designer:

  • Graph Calculator has been implemented.
  • A new surface network object titled “Heat Exchanger” has been added to model the heat transfer between two media.
  • For Standalone models and models integrated via connections, it is now possible to set fluid flow velocity control in the pipe via user-selected wells.

Well Designer:

  • The Dietz Shape Factor calculation is now supported. A shape factor allows calculating the impact of a well position in the drainage area of an arbitrary geometry for the Darcy and Forchheimer IPR models.

Material Balance Analyzer:

  • On the Scheme tab, aquifers and wells may now be created and connected to reservoirs.
  • History matching of relative permeability curve parameters to well production history data is now available.

PVT Designer:

  • The calculation of NaCl and CaCl2 salts precipitation is supported for models employing the CO2STORE option.
  • A new equation of state, Soave–Redlich–Kwong with CPA, is now supported.
  • Microemulsions (water-oil-surfactant) can now be set up with their properties calculated, visualized on a ternary plot, and taken into account in a PVT Calculator experiment.

Resource sharing

  • Agent machine resources are organized in logical nodes
  • Logical nodes are assigned to different queues
  • Resource sharing turns on and off as scheduled

To learn more, visit the Rock Flow Dynamics corporate portal.

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