Eclipse simulator

Robust, reliable reference simulator

Overview

The Eclipse™ reservoir simulator offers the most complete and robust set of numerical solutions for fast and accurate prediction of dynamic behavior for all types of reservoirs and development schemes. The Eclipse simulator has been the benchmark for commercial reservoir simulation for more than 40 years due to its robust capabilities, speed, parallel scalability, and unmatched platform coverage. The simulator covers the entire spectrum of reservoir modeling, including black-oil, compositional, thermal, and streamline simulation.

Eclipse 2026 features

Eclipse 2026.1 release announcement

Improved 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.

Eclipse new features