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Publiée le 26/03/2021
Ph.D Thesis in 3D geological architecture of sub-surface H/F

CDD / Mission - - Jeune diplômé / moins de 1 an France - Centre-Val-de-Loire - (45) Orléans

> Le poste

This doctoral project will explore an alternative paradigm for modelling 3D geological architectures of subsurface with an improved formalism of concepts and uncertainties . This project aims at (1) improving the numerical formalisation of knowledge and hypotheses embedded in the subsurface representation and (2) improving the characterization of structural uncertainties.

This project will mainly address epistemic uncertainties, which partly result from the ambiguity and sparsity of available data. Ambiguity is generally compensated by manually introducing expert interpretive information (e.g., as interpretive cross-sections).

The student in charge of this project will develop an innovative approach that implements the cognitive interpretation process applied by geologists. Its formalisation will rely on:
examples gathered in a corpus of natural and simulated objects,
a formal description of geological concepts gathered in an ontology of structures, and
on an automated interpretation method based on spatiotemporal descriptors.

This new paradigm approaches geomodelling as an automated interpretation process based on artificial intelligence instead of a direct data interpolation. The proposed method will improve the integration of heterogeneous data, scale management, and exploration of epistemic uncertainties, while clarifying the structural concepts embedded in explored architectures.

For more information on the thesis, you can contact the supervisors :
Dr. Gautier Laurent : Maître de Conférences - ISTO [gautier.laurent[a]]
Dr. Christelle Loiselet : Agent BRGM [c.loiselet[a]]
Dr. Yannick Branquet : Maître de Conférences - ISTO [yannick.branquet[a]]

⟩ Aménagement : Sites / Sols

> Le profil recherché

We are seeking a student within a Master degree formation with components of either or both structural geosciences and numerical sciences. Candidates should be either:
-in a math or computer science formation, with skills in data sciences and a taste for geosciences or natural objects; or
-in a geosciences or geophysics formation with a taste for numerical approaches.

To be successful in this application and project you'll need:
-programming skills: strong skills are not compulsory but at least first experiences in using and developing codes would be required, particularly in geometry, data sciences, or geosciences; favored language: python, c++
-a taste for discovering, understanding, and improving new tools, numerical or not
-a sound understanding of structural geology concepts and/or a deep motivation for learning this new topic
-a great capacity for abstraction and analysis, which will be essential for understanding, formalising, and explicitly defining geological objects and interpretation methods.
-as always, enthusiasm, team skills, and good reading/writing skills are absolutely necessary.

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Service géologique national, le BRGM est l'établissement public de référence dans les applications des sciences de la Terre pour gérer les ressources et les risques du sol et du sous-sol.

Son action est orientée vers la recherche scientifique, l'appui aux politiques publiques et la coopération internationale.

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