CATCH - Project ANR-18-CE05-0035
Dynamic characterization and modeling of coupled structural - chemical - and transport processes: a multiscale approach
The objectives of the CATCH project are the understanding and the prediction of changes of transport parameters in geological media in response to spatial and temporal porosity evolution. In particular, it intends to define new porosity/diffusivity relationships to replace Archie’s law whose limitations have been shown in porous systems subject to precipitation processes.
The long-term effectiveness of deep subsurface storage systems largely relies on our understanding and modeling capability of key relationships between natural media and engineered components. Changes in the mineral matrix due to dissolution-precipitation reactions due to perturbations caused by geological applications can lead to changes in the macroscopic transport properties of the geological medium. Predictions can be made by considering transport processes coupled to chemical reactivity, but current reactive transport models (RTM) have severe limitations due to an incomplete understanding and quantification of the underlying mechanisms and processes. Using a combination of multiple methods and multi-scale characterizations, we intend to make a fundamental step forward in the predictive ability of RTM, based on bridging the pore and continuum scales.
Coordination: Christophe Tournassat (ISTO)
- Task 1, Continuum scale characterization: Francis Claret (BRGM)
- Task 2, Pore-scale characterizations: Roland Helmann (ISTerre)
- Task 3, Reactive transport modeling: continuum and micro-continuum approaches: Christophe Tournassat (ISTO)
The consortium gathers experts from the various experimental and modeling fields that are needed to encompass the full complexity of studied systems, spanning materials physics (A. Fernandez-Martinez, ISTerre) and geophysics (P. Leroy, BRGM), mineralogy (R. Hellmann, Alexander Van Driessche, ISTerre, F. Claret, BRGM, J-C Parneix, ERM), geochemistry (C. Tournassat, L. Mercury, ISTO, S. Gaboreau, BRGM), micro/nanofluidics (Sophie Roman, Lionel Mercury, ISTO), microstructure multi-scale characterization (S. Gaboreau, BRGM, J-C. Parneix, Sophie Billon, ERM), reactive transport modeling (C. Tournassat, ISTO, F. Claret, C. Chiaberge, BRGM) and multi-scale modeling (C. Soulaine, BRGM, C. Tournassat, E. Le Trong, ISTO).
- Next project meeting scheduled in August/September 2020.
- 21 November 2019: A. Lauer's thesis committee in Grenoble
- 9 October 2019: project meeting in Grenoble
- 15 March 2019: project meeting in Orléans
New Post-doc position:
The Labex Voltaire at ISTO is recruiting post-doctoral researchers. If you have a personal scientific project that matches objectives of the CATCH project, please Contact us to evaluate if your project could be funded by the LABEX.
Application deadline is September 30.
Poonoosamy, J.; Soulaine, C.; Burmeister, A.; Deissmann, G.; Bosbach, D. & Roman, S. Microfluidic flow-through reactor and 3D Raman imaging for in situ assessment of mineral reactivity in porous and fractured porous media Lab on a Chip, 20, 2562-2571
Tournassat, C.; Steefel, C.I. & Gimmi, T. Solving the Nernst-Planck equation in heterogeneous porous media with finite volume methods: Averaging approaches at interfaces Water Resources Research, 56, e2019WR026832. OPEN ACCESS
Presentations at conferences
Lauer A, Fernandez-Martinez A, Hellmann R & Van Driessche A. Nucleation pathways of sulfate minerals. Goldschmidt Conference, Barcelona.
Deng H, Molins S, Claret F, Tournassat C & Steefel C. Pore-scale investigation of precipitation driven diffusivity change at column-scale. Goldschmidt Conference, Barcelona.