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Herve Chauris

Herve Chauris

Professor

Center · STIM

Keywords

Team

STIM

Biography

Hervé Chauris is a researcher specializing in geophysics and seismic imaging, whose work focuses on the development of advanced numerical methods for subsurface exploration and characterization. His research addresses major topics such as full-waveform inversion, migration velocity analysis, and the optimization of geophysical models through innovative mathematical and computational approaches. He has contributed to the improvement of acoustic and elastic modeling techniques by integrating methods such as the adjoint state method for automatic optimization and the solution of complex inverse problems. His recent work also explores the application of machine learning methods, such as physics-informed neural networks, to solve differential equations in geophysics. Hervé Chauris is also interested in studying spectral anomalies in ambient seismic noise, particularly above hydrocarbon reservoirs, as well as characterizing the physical properties of materials, such as electronic waste, in relation to environmental and industrial challenges. His expertise also extends to high-performance computing and fault tolerance for data-intensive geophysical applications.

Publication(s)

Teaching

Signal Processing

Course Director

The Signal Processing course covers all aspects of harmonic analysis, including discrete- and continuous-time signals, convolution, operational calculus, and the Fourier transform. This content is presented in a way that makes it applicable in a variety of contexts, such as mathematics, engineering, and physics. The course establishes a fundamental link between the mathematical foundations of signal processing (Fourier analysis, wavelets, etc.) and the practical tools derived from them, such as filtering and compression. These concepts are illustrated by modern technologies that incorporate these principles, thereby providing a concrete and applied perspective on the theories covered. Furthermore, the course highlights the strong interconnections between signal processing and other fields covered by the Applied Mathematics course unit, naturally guiding instruction toward the fundamental mathematical concepts of the field. Practical exercises, designed to simply illustrate the theorems studied in class, reinforce this theoretical learning. Finally, the exploration of recent technological applications provides a current and dynamic perspective on the theoretical results presented. Independent study hours are devoted to projects on topics that go beyond the scope of the course. Recent projects have included the implementation of a music recognition algorithm based on the windowed Fourier transform, the study of signal processing tools used in tomography, and the application of signal processing tools to a geophysical problem.

VS Geology Internship

Lecturer

Elective Course Period (October and January)

Course Director

Inverse Problems

Guest Lecturer

Introduction: Origin of Inverse Problems. Study of Linear Problems: Conditioning, Least Squares, Singular Value Decomposition. Why There Is Noise in Measurements: The Example of the CCD Sensor. Regularization: Tikhonov Method, LASSO. Optimization Problems and Associated Algorithms. Problems governed by a differential equation: the adjoint method for gradient calculation Statistics: a Bayesian perspective. A posteriori estimation, least-squares estimator. Use of neural networks: the Plug-and-Play framework Each half-day will consist of one lecture session and one tutorial or lab session.

Subsurface Geophysics (Internship)

Course Director

The course will take place off-campus for one week, primarily in the field (in the Fontainebleau Forest, south of Paris), followed by classroom sessions in the afternoon. Introductory lectures: fundamental concepts, survey methods, case studies (magnetic, electrical, electromagnetic, and seismic methods); Fieldwork: acquisition of various types of geophysical data, geological observations. Lab sessions: preparation of data acquisitions, processing, and interpretation; Experimental work and data processing will be conducted in small groups. Students will be expected to take the initiative both in the field and when synthesizing results.

Geosciences (GEOSCIENCES) track

Course Director

The program is organized into two main periods at the École des Mines: one month in September/October and 15 days in January, as well as an internship period that takes place either at a company or in a research laboratory. The geosciences track is directly linked to the research conducted at the Geosciences Center and involves numerous faculty members from that center, who equip students with the necessary knowledge to engage effectively in meetings and visits with professionals. The two periods—in the fall and in January—consist of lectures, field trips, and mini-projects on the one hand, and site visits and meetings with professionals on the other. The table below outlines the topics covered and the teaching methods. Topic Lectures and Mini-Projects Site Visits, Meetings with Professionals Risk Assessment and Uncertainty Management Risks Associated with Soil Pollution Geostatistical Tools BRGM - Landslide risks Monitoring / characterization Sampling in natural environments Geophysical tools Georeferencing Hydrogeological monitoring Fiber optics Invisensing - Fiber optics research Eau de Paris / SAUR Storengy - Research Center Spotlight – “Continuous Monitoring” Startup Understanding Natural Phenomena and Human Interactions Behavior of Pollutants in Natural Environments Geochemistry Hydrogeochemistry Seismic Imaging Volcanic systems Andra - Underground laboratory for studying nuclear waste storage CGG - Research and data processing center GISFI - Experimental site on a brownfield site Storengy - Research center Resource and waste management Geothermal potential Induced seismicity Hydrogeology in fractured environments Eau de Paris / SAUR Storengy - Underground gas storage site Fonroche - Deep geothermal power plant Ileva - Waste treatment and recovery center EDF - Sainte Rose Hydroelectric Power Plant TOTAL Group CIGEO Project Prevention, Management, and Remediation Participatory Initiatives Artelia New Coastal Road Construction Project in Saint Denis, Réunion EVOLEN Symposium What do young graduates go on to do? Some continue their education by pursuing a Ph.D. in geosciences through industrial collaborations or academic theses: Stanford, ENS, CNRS, CEA, IPGP, MINES Paris Some pursue further training Petroleum Engineering at Texas A&M / IFP School / Corps des Mines Some enter the industrial sector, consulting, or public administration: Technic-Atome, EDF, TOTAL, NAVAL, AIR LIQUIDE, SUEZ ARTELIA, MAZAR, AGENCE FRANCAISE DE DEVELOPPEMENT, DRIEE

PhD supervision

  • 2023 New approaches for monitoring CO2 storage through lightweight seismic acquisitions: estimation of time shifts and impact of full waveform modeling CABIATIVA PICO Victor
  • 2023 Telecommunication of geological layers using seismic waves AKLEH Christina
  • 2022 Opportunistic listening of train-generated vibrations for sub-surface imaging and railway track monitoring REBERT Théo
  • 2022 The impact of deep generative models for solving nonlinear inverse problems: application to seismic imaging XIE Yuke
  • 2022 Geomechanics data/processes: Inferring permeability evolution at the laboratory scale BEN KHALED Inès
  • 2021 Assisted scheduling of production histories in reactive transport: Application to in situ uranium recovery. COLLET Antoine
  • 2020 Machine learning and compliance with physical laws: application to seismic imaging DE SOUZA Léo
  • 2020 Urban Mines and Sampling of Waste Electrical and Electronic Equipment (WEEE) BARTHET Alexis
  • 2019 Amplitude anomalies of ambient seismic noise induced by an anticlinal structure: application to gas reservoir contexts EL KHOURY Christine
  • 2018 Multi-parameter seismic imaging: linearized wave-equation approach FARSHAD Milad
  • 2016 Velocity analysis by migration: user parameter selection and transmitted wave introduction ZHOU Tianyou
  • 2016 Hydro-Mechanical Reactivation of a Fault Rate & State: Slip, Seismicity, and Permeability Evolution ALMAKARI Michelle
  • 2015 Seismic imaging: strategies for visco-acoustic waveform inversion JIANG Hao
  • 2015 Amplitude perturbations of ambient noise at the location of heterogeneities: feasibility study for the exploration and monitoring of multi-fluid reservoirs KAZANTSEV Alexandre
  • 2015 Continuous and real-time 4D seismic data analysis and processing for subsurface monitoring COTTON Julien