Seismic Waves for Telecommunication Through - Fontainebleau, France - MINES ParisTech

MINES ParisTech

Entreprise vérifiée

Fontainebleau, France

il y a 3 semaines

Posté par:

Sophie Dupont

beBee Recruiter

Description

Seismic waves for telecommunication through geological layers:

Réf

-
ABG-111335

Sujet de Thèse 21/02/2023
Financement public/privé
MINES ParisTech
Lieu de travail
Fontainebleau
IledeFrance
France
Intitulé du sujet : Seismic waves for telecommunication through geological layers
Champs scientifiques
Télécommunications
Numérique
Physique

Mots clés

Telecommunication, seismic imaging, subsurface monitoring, energetic transition
Description du sujet:

Project description

The CIGEO project is a French industrial project for the disposal of long-term highly radioactive waste in a geological layer.

It is designed to accommodate all current French nuclear facilities and includes closure structures and containment barriers at different spatial and temporal scales.

In the context of monitoring and surveillance, one of the challenges is to study the telecommunication means adapted to the specificities of deep disposal, in particular at the scale of the geological layers between the bottom (around 500 m) and the installations at the surface.

One solution is to use traditional means of telecommunications to transfer information such as daily readings of temperatures, deformations or other physical quantities measured at depth.

The objective of the PhD thesis is to study an alternative approach.

ANDRA (National Agency for Radioactive Waste) wishes to be able to transmit information from the subsurface to the surface by exciting a seismic source which will emit acoustic / elastic waves at the bottom.

This is a non-conventional solution to be studied in this project, at the border between the fields of geophysics and telecommunications.

The main challenges are as follows: how to encode (at 500 m depth) and decode (at the surface) the relevant information in a robust way? In particular, elastic waves are attenuated during propagation, with a distortion of the signal which depends on the frequency.

Sensors at the surface will also record ambient noise in the same frequency ranges as the signal of interest (typically 10 to 1000 Hz).

Furthermore, the geological environment may vary over time (especially the first meters to the surface), for example because of variable hydrological conditions.

Consequently, for the same signal transmitted from the source in depth, the signals received will be modified according to the calendar time.

Finally, it will also be important to understand the relationship between the amounts of information transmitted versus the energy required to excite the seismic source.

Real data has already been acquired as part of the SeisCom project and other acquisitions may take place during the thesis.

They will be supplemented by modelling, for example to study the effect of attenuation on the decoding of information.

Prise de fonction:

02/10/2023
Nature du financement:
Financement public/privé

Précisions sur le financement:

Contrat doctoral classique
Présentation établissement et labo d'accueil:
MINES ParisTech

MINES ParisTech forme depuis sa création en 1783 des ingénieurs de très haut niveau capables de résoudre des problèmes complexes dans des champs très variés.

Première école d'ingénieurs en France par son volume de recherche contractuelle, MINES ParisTech dispense une importante activité de recherche orientée vers l'industrie.

Ses domaines de recherche s'étendent de l'énergétique aux matériaux, en passant par les mathématiques appliquées, les géosciences et les sciences économiques et sociales.

L'école d'ingénieurs développe également la création de chaires d'enseignement et de recherche sur des thèmes émergents.

MINES ParisTech est membre fondateur de ParisTech qui rassemble 12 des plus grandes écoles d'ingénieurs et de management parisiennes.

L'Ecole est également membre de la COMUE Paris Sciences et Lettres PSL qui rassemble 16 institutions d'enseignement supérieur et de recherche prestigieuses, situées au cœur de Paris.

Site web:

Intitulé du doctorat: