Numerical Modeling of CO2 sequestration with MUFTE_UG

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XVI International Conference on Computational Methods in Water Resources (CMWR-XVI) Ingeniørhuset

Numerical Modeling of CO2 sequestration with MUFTE_UG
Paper
Author:Andreas Bielinski <andy@iws.uni-stuttgart.de> (Institute of Hydraulic Engineering, University of Stuttgart)
Anozie Ebigbo <anozie.ebigbo@iws.uni-stuttgart.de> (Institute of Hydraulic Engineering, University of Stuttgart)
Andreas Kopp <andreas.kopp@iws.uni-stuttgart.de> (Institute of Hydraulic Engineering, University of Stuttgart)
Holger Class <holger.class@iws.uni-stuttgart.de> (Institute of Hydraulic Engineering, University of Stuttgart)
Rainer Helmig <rainer.helmig@iws.uni-stuttgart.de> (Institute of Hydraulic Engineering, University of Stuttgart)
Presenter:Andreas Bielinski <andy@iws.uni-stuttgart.de> (Institute of Hydraulic Engineering, University of Stuttgart)
Date: 2006-06-18     Track: Special Sessions     Session: Geologic Sequestration of Carbon Dioxide
DOI:10.4122/1.1000000689
DOI:10.4122/1.1000000690

This presentation gives an overview of the modeling capabilities of our group and our participation in various CO2-related projects. Furthermore, a benchmark example is discussed in detail. We use the numerical simulator MUFTE_UG for computing non-isothermal multi-phase multi-component flow and transport processes in porous media. It has been extended by a two-phase two-component model concept for the simulation of CO2 sequestration in geological formations. It takes into account the two phases CO2 and brine and the components CO2 and water which can dissolve in the different phases. Furthermore, non-isothermal effects are considered by solving an energy equation. Chemical reactions are not taken into account by the code. To show the capabilities of MUFTE_UG the results of principle calculations will be presented, such as CO2 plume evolution in the subsurface, long-term storage behavior of dissolved CO2, and non-isothermal effects especially during leaky-well scenarios. Our work group currently participates in two research projects dealing with CO2 sequestration; these are: - "CO2SINK": this project is a field-scale laboratory for testing CO2 injection underneath a densely populated area close to Berlin. The large-scale numerical simulation of the CO2 injection process, of various scenarios referring to scarce geological input data, and of long-term CO2 plume evolution is the task that our group is dealing with. CO2SINK is funded by the EU. - "Numerical Investigation of CO2 Sequestration in Geological Formations - Problem-Oriented Benchmarks": the tasks of this project are the development of benchmark problems to be used within the scientific community for the comparison and verification of different numerical codes. The benchmark computations deal with different subjects within the framework of CO2 sequestration, e.g. storage-capacity estimation of aquifers, computation of plume evolution and comparison with analytical solution methods, and enhanced coalbed methane recovery. The project is funded by the German Research Foundation (DFG) and the Federal Ministry of Education and Research (BMBF). One of the benchmark examples will be presented in detail, including the assumptions for the geology, the choice of the domain, and the grid generation. The initial and boundary conditions will be motivated before showing and discussing the simulation results. Finally, we will summarize our work and give an overview of the next steps that we plan to take in our research field.