Publication Details |
| Category | Text Publication |
| Reference Category | Conference papers |
| DOI | 10.5194/egusphere-egu23-7016 |
Licence  |
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| Title (Primary) | Numerical investigation on the impact of thermo-osmosis on fluid pressurisation and barrier integrity in Boom clay – a case study of the ATLAS in-situ full-scale heating experiment |
| Title (Secondary) | EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023 |
| Author | Kiszkurno, F.
; Buchwald, J.
; Kolditz, O.
; Nagel, T. |
| Source Titel | EGUsphere |
| Year | 2023 |
| Department | ENVINF |
| Page From | EGU23-7016 |
| Language | englisch |
| Topic | T8 Georesources |
| Abstract | Existing literature suggests the importance of the thermo-osmosis
(TO) for an accurate simulation of pore pressure evolution in heater
tests for nuclear waste disposal in clay rock. However, there is limited
consensus regarding the appropriate choice of parameters controlling TO
and the extent of its physical impact. Uncertainty of parameters
describing the host rock and their spatial variability further add to
both the complexity of this consideration. This study will use the
ATLAS in-situ full-scale heating experiment from the HADES underground
research laboratory in Mol, Belgium, to investigate the impact of TO on
the thermal pressurisation in Boom Clay and its significance for the
evaluation of barrier integrity. The ATLAS experiment was simulated with an inelastic thermo-hydro-mechanical model implemented in OpenGeoSys. After comparison to published data, assisted-history-matching was performed to obtain a good representation of the in-situ measurements with and without taking into account TO. The comparison of both groups allows a clearer discussion of the influence of TO on temperature and pressure evolution in the studied system. The final step -- uncertainty quantification of the TO parameterisation -- puts the results in the context of the large parameter uncertainty documented in the literature. Subsequently, the impact of TO and said uncertainties on barrier integrity was estimated in terms of area and duration of potential integrity violation using statistical and geometrical methods. The dilemma for modellers using distributed HMs is to compromise in resolution (i.e., runtime) or to compromise on the number of reservoirs to model. Based on the preliminary results, SCC is poised to solve this long-standing dilemma and complete the quest for scalable hydrological modeling with reservoirs. The findings of this study would contribute to the contemporary effort of hydrological modeling society towards improved global water balance closure, where a good representation of reservoirs and lakes is a crucial element. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=27316 |
| Kiszkurno, F., Buchwald, J., Kolditz, O., Nagel, T. (2023): Numerical investigation on the impact of thermo-osmosis on fluid pressurisation and barrier integrity in Boom clay – a case study of the ATLAS in-situ full-scale heating experiment EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023 EGUsphere Copernicus Publications, EGU23-7016 10.5194/egusphere-egu23-7016 |
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