ANNOUNCING ECHELON 2025.1

Stone Ridge Technology and Eni announce the release of ECHELON 2025.1 which provides users with the following new features developed by our highly-skilled teams in Milan and North America:

Latest NVIDIA architecture support

ECHELON 2025.1 now offers full support for NVIDIA Blackwell architecture including desktop variants.

Black oil modeling with temperature dependence

With this release, ECHELON can now perform black oil modeling with implicit temperature computations. Thermal boundary conditions (underburden and overburden) are available to model energy entering or exiting the reservoir grid, and degradation of injected polymer due to temperature effects can be determined.

Salt precipitation

Users can now model the precipitation of salt from brine in compositional models when the concentration of salt exceeds a user-specified threshold. Reduction of transmissibility due to precipitation is captured, which can be modeled as either reversible or irreversible.

Other features and improvements

• Handling of unknown keywords in ECHELON has been improved for many cases, with messages that inform the user of the problem in the input.
  

• Error checking for input of required grid arrays has been improved; ECHELON will stop with a descriptive message when required arrays have missing values, and warn the user if too many values are given.
  

• The Adaptive Implicit Method (AIM) can now be used with livewater models.
  

• The FLORES keyword, which outputs reservoir flow information for the grid, has been enhanced so that third-party tools, that compute and visualize streamlines, will now be able to do so from ECHELON models containing FLORES in the RPTRST input.
  

• New boundary conditions are available for standalone FNS models, allowing users to apply rate constraints or simple hydraulic flow constraints based upon a specified productivity index or a specified injectivity index.
  

• For coupled ECHELON and FNS simulations, when wells are linked at the bottom hole with CHOKE NO enabled, the pressure difference is communicated from FNS to ECHELON and utilized by ECHELON in the same manner as for wells linked at the wellhead.
  

• Standalone FNS models now can use IPR curves that include the unstable liquid holdup region.
  

• The averaging method used to compute the transmissibility multiplier between two cells as a function of the rock compaction multiplier can now be selected by the user.
  

• A new methodology has been implemented to determine intersections between well trajectories and the grid, resulting in a significant performance improvement in that phase of the code. For a model with many wells, the overall runtime may be significantly reduced.
  

Please contact Stone Ridge Technology to obtain this 2025.1 release of ECHELON for commercial use, for trial projects, or for additional information on ECHELON capabilities.