Speaker
Description
Karstification is a complex process involving coupled physical and chemical mechanisms that can be investigated numerically under different conditions. This work focuses on karstification in porous media, with particular attention to ghost-rock karstification.
The objective of this work is to investigate the sensitivity of karstification to key parameters and to assess their influence on the evolution of karst properties through numerical simulations.
PFLOTRAN code is used to perform these simulations, as it can handle complex geochemical systems, and is able to solve both transport and reaction processes implicitly. A laboratory experiment reproducing marl dissolution through CO2-enriched fluid injection is used as the reference for the calibration of our model, adjusted by the comparison between experimental observations and computed results from the simulations, under similar conditions. The numerical model is designed to reproduce the experimental setup at the laboratory scale, leading to a progressive evolution toward field conditions. Reactive transport simulations are performed under controlled boundary conditions (an inflow and an outflow in a fractured matrix, surrounded by non-flow borders), and can isolate the effects of individual parameters to better understand the governing processes of karst development.
This research is expected to contribute to a better understanding of karstification and the influence of environmental, fluid, and material properties on this process.
| Country | France |
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