Praktikum für Master Studenten

Objectives:

The 6 months long internship will focus on evaluating and testing PFLOTRAN-OGS, a reservoir simulator specifically designed for CO2 storage. The main aim will be to understand the simulator’s compatibility with other industry standard numerical simulators as well as testing and identifying key differences. The study will include conversion of the simulation models of depleted gas and oil reservoirs from ECLIPSE/tNavigator format to PFLOTRAN, comparison of the results and simulator performance (speed, convergence etc.). Additionally evaluation should cover multiple options of brine density calculations, cross-interpolation between CO2-water and HCgas-water relperm tables, implementation of GERG2008 EOS and schedule conversion from Eclipse/tNavigator to PFLOTRAN format.

Tasks and deliverables:

  • Convert tNavigator gas-reservoir compositional and black-oil model to PFLOTRAN format
  • Convert tNavigator oil-reservoir compositional model to PFLOTRAN format
  • Perform history matching using PFLOTRAN-OGS for depleted hydrocarbon fields before CO2 injection simulations can be carried out.
  • Compare base case simulation results for multiple CO2-H2O-solubility options between different simulators.
  • Test stability of numerical solution (with higher and lower injection rates, continuous and cyclic injections) and perform runtime sensitivity.
  • Test the thermal options in gas water mode.
  • Create a conceptual 2D model to test brine density (effect of salinity) calculation options, cross-interpolation between CO2-water and HCgas-water relperm tables (including hysteresis) and implementation of GERG2008 EOS.

Requirements:

Candidate should have good understanding of numerical reservoir simulation and different Equation of states used in the industry. Knowledge of ECLIPSE and/or tNavigator is a must.

References:

  1. opengosim.com

Location:

Kassel

Start/Duration:

01.04.2023, duration 6 months

Contact:

Institute of Subsurface Energy Systems
Department of Reservoir Engineering

Dr.-Ing. Bettina Jenei
bettina.jenei@tu-clausthal.de