Praktikum für Master Studenten


6 months internship with focus on evaluating and benchmarking of the outcomes of the joint development project GELECO2. The project’s aim is to develop a controller software for coupling of the reservoir simulator CMG GEM and the transient wellbore flow simulator KDI Ledaflow in order to allow for integrated modelling of the wellbore-reservoir system in context of CO2 injection (CCS). In addition to that, functionality of the two simulators is adjusted/extended for better handling of complex CO2 thermodynamics. Based on performance, the internship can be extended into a Master Thesis.

Tasks and deliverables:

  • Evaluate performance and accuracy of the developments by conceptual modelling.
  • Emphasis of evaluation is on CO2 injection scenarios with transient character:
    • injection start-up & shut-in,
    • CO2 phase-transition and multiphase flow in wellbore and reservoir, esp. during CO2 injection into pressure depleted geological formations
    • Etc.
  • Evaluate simulator capabilities in terms of modelling thermodynamic behaviour of pure and impure CO2 for PT and PH flash formulations.
  • Benchmarking of the results against published data and other simulators (OLGA, T2WELL).


  • Know-how on numerical reservoir and wellbore flow modelling
  • Know-how on PVT modelling, fluid thermodynamics and mechanics
  • Coding skills are beneficial, but not required  
  • Basic know-how on working with CMG GEM or any other product from CMG family is a plus


  1. Peng, L.; Han, G.; Chen, Z.; Pagou, A.L.; Zhu, L.; Abdoulaye, A.M. Dynamically Coupled Reservoir and Wellbore Simulation Research in Two-Phase Flow Systems: A Critical Review. Processes 2022, 10, 1778.
  2. Pan, C., Romero, C.E., Levy E.K. Fully coupled wellbore-reservoir simulation of supercritical CO2 injection from fossil fuel power plant for heat mining from geothermal reservoirs. 10.1016/j.jcou.2018.09.003,




01.04.2023, duration 6 months


Institute of Subsurface Energy Systems
Department of Reservoir Engineering

Dr.-Ing. Bettina Jenei