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
Eclipse 2026.2 release announcement

New injection differential pressure control in Eclipse 100

Improvements have been made to the tracer reporting in Eclipse 300

A new well control mode has been introduced for injector wells in Eclipse 100. It enforces a maximum injection differential pressure for each well, similar to how well drawdown controls work for producers. A new keyword, WELIDP, manages the activation of this feature, and the BRILLIG example deck has been updated to demonstrate its use.

Improved support for complex well completions with lumped completion reporting in Eclipse 100

Local grid lumped completion keywords (those starting with ‘LW’ and ending with ‘L’) are now available in Eclipse 100, with improved validation, allowing for greater resolution analysis of wells with complex perforations.

Intel MPI version updated

Intel MPI 2021.18 has been added to the DVD for Windows and Linux.

New and improved functionality

For both the Eclipse 100 and Eclipse 300 simulators

Initialization of user defined arguments (UDAs) in the WELDRAW keyword have been improved to handle wells defined using both a UDA and a wildcard for the well name.

Eclipse new features