Étude Multi-échelle Du Comportement Mécanique Du - Fontainebleau, France - Mines Paris-PSL

Mines Paris-PSL
Mines Paris-PSL
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Fontainebleau, France

il y a 3 semaines

Sophie Dupont

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Sophie Dupont

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Description

Étude multi-échelle du comportement mécanique du sel gemme // Multi-scale approach for the mechanical behavior of rock salt:

  • Réf
    ABG-121339

ADUM-55219

  • Sujet de Thèse 16/03/2024
  • Contrat doctoral
  • Mines Paris-PSL
  • Lieu de travail
  • Fontainebleau
  • France
  • Intitulé du sujet Étude multiéchelle du comportement mécanique du sel gemme // Multiscale approach for the mechanical behavior of rock salt
  • Mots clés sel gemme, approche multiéchelle, essais en laboratoire, microstructure, modélisation, stockage souterrain
- rock salt, muti-scale approach, laboratory testing, microstructal considerations, modeling, unterground storage
Description du sujet:

  • Currently, in standard engineering practice, the behavior of rock salt is modeled using macroscopic constitutive creep laws, based on the results of laboratory tests on centimetric-scale samples.

    The duration of such tests is inevitably much shorter than the relevant time scales of the target underground facilities. This is delicate, as the mechanical behavior of rock salt is time-dependent (creep).

    In order to reduce the uncertainties associated with long-term extrapolation, for instance during cavern operation (e.g., estimates of cavern volume) and during cavern abandonment (e.g., monitoring of cavern pressure and volume, brine management, operations at the well head), this PhD thesis aims at improving the predictive capabilities of constitutive laws by enriching macroscopic observations with physical considerations at the microscopic scale (where the mechanisms governing creep operate).

    To this end, laboratory tests on centimetric-scale samples will be combined with microscopic analyses performed before and after the experiments.

    The results of the study will be integrated into constitutive laws, which will be implemented in dedicated FEM software to simulate several storage scenarios, as well as the abandonment phase of salt caverns.

    The PhD thesis will be performed in the context of a European research project including modelers and experimentalists.

    The PhD student will benefit from an international team including complementary researchers that work at different spatial scales (from the microstructure to the salt cavern scale).

Currently, in standard engineering practice, the behavior of rock salt is modeled using macroscopic constitutive creep laws, based on the results of laboratory tests on centimetric-scale samples.

The duration of such tests is inevitably much shorter than the relevant time scales of the target underground facilities. This is delicate, as the mechanical behavior of rock salt is time-dependent (creep).

In order to reduce the uncertainties associated with long-term extrapolation, for instance during cavern operation (e.g., estimates of cavern volume) and during cavern abandonment (e.g., monitoring of cavern pressure and volume, brine management, operations at the well head), this PhD thesis aims at improving the predictive capabilities of constitutive laws by enriching macroscopic observations with physical considerations at the microscopic scale (where the mechanisms governing creep operate).

To this end, laboratory tests on centimetric-scale samples will be combined with microscopic analyses performed before and after the experiments.

The results of the study will be integrated into constitutive laws, which will be implemented in dedicated FEM software to simulate several storage scenarios, as well as the abandonment phase of salt caverns.

The PhD thesis will be performed in the context of a European research project including modelers and experimentalists.

The PhD student will benefit from an international team including complementary researchers that work at different spatial scales (from the microstructure to the salt cavern scale).


Début de la thèse : 01/10/2024
Nature du financement:

  • Contrat doctoral
    Précisions sur le financement:
  • Concours pour un contrat doctoral
    Présentation établissement et labo d'accueil:
  • Mines Paris-PSL
    Etablissement délivrant le doctorat:
  • Mines Paris-PSL

Ecole doctorale:

  • 398 Géosciences, Ressources Naturelles et Environnement o Rock mechanics and continuum solid mechanics o Thermodynamics o Programming and modeling experience o Fluent in English and ideally French o Eager to work in a multidisciplinary, international environment o Eager to get involved in laboratory experiments on rock samples
  • Rock mechanics and continuum solid mechanics o Thermodynamics o Programming and modeling experience o Fluent in English and ideally French o Eager to work in a multidisciplinary, international environment o Eager to get involved in laboratory experiments on rock samples 17/05/2024
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