Schlumberger OLGA 2024.2

The Schlumberger OLGA dynamic multiphase flow simulator models time-dependent behaviors. Dynamic The OLGA* dynamic multiphase flow simulator models time-dependent behaviors. Dynamic simulation is extensively used in both offshore and onshore field developments. From wellbore dynamics – for any well completion – to pipeline operations – for process systems containing any type of equipment – the OLGA simulator provides an accurate prediction of key operational conditions involving transient flow. Together with the PIPESIM* steady-state multiphase flow simulator, Schlumberger provides a complete software solution for design and optimization of production systems.
The Olga simulator enables key flow simulation applications, including

liquids handling
sizing separators and slug catchers
managing solids
simulating key operational procedures including start-up, shut-down, and pigging
modeling for contingency planning
assessing environmental risk in complex deepwater drilling environments.

Improvements to parametric studies
Schlumberger Olga 2024.2 introduces the following important updates to the parametric study functionality:

Deletion of parameters: Users can now delete parameter columns in a study. A new “Delete Column” option is available in the right-click menu on the parameter column. If only one parameter is present in a study, the “Delete Column” menu item is disabled.
Indicator for steady state pre-processor failures: Cases that end with a steady state pre-processor failure are highlighted in orange in the study window. This feature applies when the “Run” option is used to simulate cases.
Improved sorting in plotting: When plotting parametric study results, sorting is based on the entire case name rather than just the first digit.

Stabilized well control simulations in the Olga simulator
Olga 2024.2 includes updated numerics to handle counter-current flow. In the past, during counter-current flow, the upstream control volume was retained from the last time step of co-current flow. However, when the upstream control volume became filled with one of the phases, there was no interface between the two phases, resulting in zero interface friction. This situation could lead to a stagnant column of a light phase (such as gas) not being displaced by a heavy phase (oil or water) in a vertical pipe, especially at very high heavy phase velocities. To remedy this, the total volume flow is used to determine the upstream conditions for slip calculations. Furthermore, the amount of oil/water in a control volume is used to limit the amount of oil/water dispersed in water/oil in transient simulations. This is applicable to bullheading as well as any other scenario with counter-current flow.

Improvement of inhibitor tracking

Olga 2024.2 is released with improvements for the inhibitor tracking functionality. Previously, the Olga simulator relied on built-in correlations to adjust the density and viscosity of the water phase containing inhibitors.

However, this approach could lead to inaccurate temperature calculations in the Olga simulator, e.g. for simulations where mono-ethylene glycol (MEG) or any other inhibitor was injected upstream a choke with a dP across the valve and Joule–Thomson (JT) cooling occurs. The new approach, released in Olga 2024.2, is using the Multiflash PVT package with high accuracy corresponding states model advanced (CSMA) equation of state (EOS) to adjust all water phase properties, such as density and viscosity of the water phase, but also thermal properties like thermal capacity and enthalpy. Notably, surface tension between water and gas, and between water and oil remains an exception. The improvement is relevant for COMPOSITIONAL equal to MEG, MEOH and ETOH.

Product: Schlumberger OLGA 2024.2
Version: 2024.2
Supported Architectures: x64
Language: english
Supported Operating Systems: Windows 7even or newer
Size: 1DVD