New Software Release

The Eclipse™ 2026.1 release includes developments enhancing the performance, usability, and functionality of the simulators.

Release updates

Tracer reporting

Improvements have been made to the tracer reporting in Eclipse 300

• Tracers with a carrier name of ‘H2O’ are now mapped to the water phase
• Consistency for the summary keywords between Lagrangian and non-Lagrangian tracers has been implemented
• Implemented smart handling of tracer carrier in dead oil in a component model. It is treated as being in the oil phase rather than the wet gas phase.

New and improved functionality

For both the Eclipse 100 and Eclipse 300 simulators

• Tracers with a carrier name of ‘H2O’ are now mapped to the water phase
• Reporting output has been improved to allow for i,j,k indices with more than three digits, improving readability of output such as messages and tables in the PRT file.
• Reporting output for quantities has been made more robust to handle extreme values.

For the Eclipse 100 simulator

• Handling of date table keywords and DATES keywords containing multiple dates has been improved.
• Handling of local grid refinements (LGRs) and LGRLOCK has been made more robust.

For the Eclipse 300 simulator

• The algorithm used for generating K-values via the KVGEN keyword has been improved to reduce incorrect phase identification.
• The coefficients in the Trangenstein formula for water density have been enhanced, providing consistency between Eclipse 300 and the Intersect™ reservoir simulator.
• Error handling and reporting for INCLUDE files has been improved.
• Permeability modifications made in the SCHEDULE section can now be included in connection factors calculated after the modification.
• PVT extrapolation reporting has been made more robust.
• Occurrence of duplicated messages by invalid block keywords in the SUMMARY section have been reduced, making for more sensible reporting.

Learn more about Eclipse reservoir simulator