Schlumberger OLGA 2023.1

Olga simulator single phase

In Olga  first stage release of our Olga single phase solution. This will be a lighter and faster version of the Olga simulator for handling single phase only. The improved version of the Olga simulator will minimize set of calculations required for pure single-phase flow to maximize simulation speed. This way we can considerably improve efficiency and usability for the Olga simulator when applied to single phase systems such as hydrogen simulations.

Compositional tracking with Symmetry

Olga is released with the possibility of using the Symmetry process simulation software fluids engine as an option for compositional tracking. Symmetry software can be selected as the compositional engine under COMPOPTION in the Olga simulator. The Symmetry software fluids engine is a powerful and accurate thermodynamics engine part of the SLB software offering, bringing consistent thermodynamics from pore to product.

Network segments freeze  

Olga is released with the possibility of freezing the transient calculations for a branch. This is done by adding “SIMULATIOINOPTIONS” for a flow path and setting the “TRANSIENT” key to “FREEZE” or “NOFLOW”. If “FREEZE” is selected no calculations are done for the flow path. If “NOFLOW” is selected only temperature calculations are conducted, where only thermal capacity of the fluid is considered.

VKH and IKH calculations

Olga is released with Inviscid Kelvin–Helmholtz (IKH) and Viscous Kelvin–Helmholtz (VKH) stability indicators as output. VKH instability combined with stratified flow may indicate large wave flow in the system. The user can then investigate wave formation and propagation using a fine grid dynamic Olga simulator model and the 2nd order mass equation scheme in the Olga simulator.

Multiflash 

The Multiflash library has been updated from the previous release from 7.3 to 7.4. Version 7.4 has the following important updates:

Improved accuracy for CO2 modelling.

Improved CO2 hydrates model.

Improved PH flash stability.

Improved GERG-2008/EOS-CG.

AGA-8 density support.

Improved data regression.

Polymers modelling and perturbed chain statistical associating fluid theory (PC-SAFT).