Intitulé de l'offre : PhD Student M/F (H/F)
Référence : UMR5150-DANBRI-001
Nombre de Postes : 1
Lieu de travail : PAU
Date de publication : mercredi 31 janvier 2024
Type de contrat : CDD Doctorant/Contrat doctoral
Durée du contrat : 36 mois
Date de début de la thèse : 1 mai 2024
Quotité de travail : Temps complet
Rémunération : 2 135,00 € gross monthly
Section(s) CN : Earth System: superficial envelopes
Description du sujet de thèse
Passive seismic monitoring of natural hydrogen
Despite being the most abundant element in the universe, hydrogen has long been considered insignificant on Earth. Yet hydrogen is now considered the clean energy carrier of the future, as its only combustion product is water. Indeed, the discovery (or rediscovery) of natural hydrogen is changing the game from an economic, ecological and environmental point of view. Natural hydrogen now appears as a new natural resource whose development and understanding will require collaboration between the academic and industrial communities to ensure its responsible and sustainable use.
Passive seismic, and here in particular the cross-correlation method, has developed considerably over the last twenty years in the global geophysical community. A campaign of passive seismic measurements will be carried out in the course of this thesis to assess the method's potential in the context of a known hydrogen system. The seismic background will be continuously recorded by a dense network of geolocated and synchronized nodes. This monitoring will be complemented by continuous recording of hydrogen levels in the ground.
The objectives of this thesis are to :
- Identify potential site-wide fluid migration zones where changes in seismic velocities appear to be occurring;
- Compare these observations with monitoring of hydrogen levels in the first meter of soil;
- Propose an interpretation in terms of saturation rates in the area explored by surface waves;
- If data quality permits, an interpretation as a function of depth, enabling the phase change to be located.
Contexte de travail
LFCR (Université de Pau et des Pays de l'Adour) is involved in research programs on native hydrogen and is developing a passive device to monitor H2 emissions in the field.
ISTerre (Université Grenoble Alpes) is a major player in passive seismic measurements worldwide and in subsurface geophysical characterization.
Le poste se situe dans un secteur relevant de la protection du potentiel scientifique et technique (PPST), et nécessite donc, conformément à la réglementation, que votre arrivée soit autorisée par l'autorité compétente du MESR.
Thesis funded by the PEPR "Sous-sol, bien commun", Aquitaine project.