New Software Release

The Eclipse™ 2025.4 release includes developments enhancing the performance, usability, and functionality of the Eclipse reservoir simulator.

Release updates

Improvements to OFM™ well and reservoir analysis software output

Several improvements have been made to the output of results to the OFM software:

• In Eclipse 300, OFM software output is now generated for wells which are defined and/or connected in local grids. Unique identities for connections in local grids incorporate the local grid refinement (LGR) name as well as the local grid IJK indexes.
• In both Eclipse 100 and Eclipse 300, there is no longer a limit of 100 output keywords for each well and connection.
• In both Eclipse 100 and Eclipse 300, unique identities for connections now support IJK indexes with up to 5 digits in each index.
• In both Eclipse 100 and Eclipse 300, spurious output in the connections file for wells which have no requested connection output has been removed.

Rock enthalpy reporting

For Eclipse 300 thermal cases, temperature dependent rock enthalpy per unit volume can now be reported to print (PRT) and restart (RST) files.
 

New and improved functionality

For both the Eclipse 100 and Eclipse 300 simulators

• Connection output to the RSM and PRT files now supports individual indexes with up to 5 digits.

For the Eclipse 100 simulator

• Connection output to the RSM and PRT files now supports in
• Connection output to the RSM and PRT files now supports in
• Handling of the combined solvent and temperature options has been enhanced.
• Output of negative multiplier (e.g., MULTX-) to the initial 3D results (INIT) files has been improved for parallel runs.

For the Eclipse 300 simulator

• The behavior of the “ALL“ summary keyword has been made consistent with Eclipse 100.
• ACTIONX conditions can now consider secondary well quantities starting with “FD“ and “GD“.
• Gradient calculations performed via the “OPTIMIZE” section have been made more robust.
• For thermal dual porosity models with local grids, treatment of thermal transmissibility between local and global grid blocks has been enhanced.
• Output of rock volume (ROCKV) to restart files has been made more robust.
• The textual representation of extremely large values in the print (PRT) file has been improved.
• Dataset verification has been improved. For instance:
• ACTIONX has been improved to avoid unexpected results for invalid and badly formatted conditions.
• LC and C summary vectors with individually defaulted indexes are now ignored.
• Item 2 of WLIFTOPT is now checked for validity.
• A warning is now generated for default values of TCRIT.

Learn more about the Eclipse reservoir simulator