A5047538306- Geophysical and Geoelectrical Methods
- Soil and Unsaturated Flow
- Seismic Waves and Analysis
- Groundwater flow and contamination studies
- Electrostatics and Colloid Interactions
- Enhanced Oil Recovery Techniques
- NMR spectroscopy and applications
- Ionosphere and magnetosphere dynamics
- Magnetic Field Sensors Techniques
- Hydraulic Fracturing and Reservoir Analysis
- Concrete and Cement Materials Research
- Geophysical Methods and Applications
- Mine drainage and remediation techniques
- Clay minerals and soil interactions
- Seismic Imaging and Inversion Techniques
- Optical Polarization and Ellipsometry
- Geomagnetism and Paleomagnetism Studies
- Geochemistry and Geologic Mapping
- Optical and Acousto-Optic Technologies
- CO2 Sequestration and Geologic Interactions
- Electrokinetic Soil Remediation Techniques
- Calcium Carbonate Crystallization and Inhibition
- Astro and Planetary Science
- Hydrocarbon exploration and reservoir analysis
- Solar and Space Plasma Dynamics
Bureau de Recherches Géologiques et Minières
2015-2024
United States Geological Survey
2021-2024
Institut de Recherche en Génie Civil et Mécanique
2024
École Centrale de Nantes
2024
Nantes Université
2024
Laboratoire de Physique des Plasmas
2014-2021
École Polytechnique
2014-2021
Centre National de la Recherche Scientifique
2001-2021
Sorbonne Université
2020-2021
Université Paris-Saclay
2020-2021
Abstract The tri-axial search-coil magnetometer (SCM) belongs to the FIELDS instrumentation suite on Magnetospheric Multiscale (MMS) mission (Torbert et al. in Space Sci. Rev. (2014), this issue). It provides three magnetic components of waves from 1 Hz 6 kHz particular key regions Earth’s magnetosphere namely subsolar region and magnetotail. plasmas being collisionless, such a measurement is crucial as electromagnetic are thought provide way ensure conversion thermal kinetic energies...
The constitutive coupled equations describing ionic transport in a porous shale are obtained at the scale of representative elementary volume by averaging local Nernst‐Planck and Stokes equations. final relationships check Onsager reciprocity to first order perturbation state variables with respect thermostatic state. This is characterized modified version Donnan equilibrium model, which accounts for partition counterions between Stern diffuse Gouy‐Chapman layers. After upscaling material...
Water‐saturated clay‐rich media exhibit low‐frequency (1 Hz to 1 MHz) effective conductivity and permittivity dispersions that are the consequence of both polarization mineral/water interface coating surface grains Maxwell‐Wagner polarization. These properties modeled by combining (1) a complexation model clay minerals (kaolinite, illite, smectite), (2) Stern layer (the inner portion electrical double minerals), (3) macroscopic comprising electrochemical contribution effect. The is based on...
We have developed a mechanistic model to interpret spectral induced polarization data of partially saturated clay-rocks. This accounts for the grains through an electrical double layer with inner part called Stern layer. The also Maxwell–Wagner at frequencies higher than 100 Hz. is modelled by using conductivity modified account presence non-wetting immiscible phase like air in pore space. resulting consistent first and second Archie's laws case where surface can be neglected. volumetric...
The Radio and Plasma Waves (RPW) instrument on the ESA Solar Orbiter mission is described in this paper. This designed to measure in-situ magnetic electric fields waves from continuous a few hundreds of kHz. RPW will also observe solar radio emissions up 16 MHz. primary importance science requirements since it essential answer three four overarching objectives. In addition exchange on-board data with other instruments order process algorithms for interplanetary shocks type III langmuir detections.
We consider the case of a cylindrical cored specimen saturated argillaceous sediment located between two reservoirs filled with an electrolyte. One boundaries sample is submitted to sharp pressure (or salinity change). The migration resulting saline) front through core responsible for apparition electrical field, which called streaming potential (the diffusion gradient, respectively). temporal variation this field recorded Ag/AgCl nonpolarizable electrodes and used monitor evolution...
Spectral induced polarization or complex conductivity is a promising electric method in hydrogeophysics because of its sensitivity to water saturation, permeability, and particle size distribution (PSD). However, the physical chemical mechanisms that generate low-frequency clays are still debated. To explain these mechanisms, kaolinite, smectite, clay-sand mixtures was measured frequency range 1.4 mHz–12 kHz with various clay contents (100%, 20%, 5%, 1% volume mixture) salinities (distilled...
Abstract Clay material characterization is of importance for many geo‐engineering and environmental applications, geo‐electrical methods are often used to detect them in the subsurface. Spectral induced polarization (SIP) a geo‐electric method that nonintrusively measures frequency‐dependent complex electrical conductivity material, mHz kHz range. We present new SIP data set four different types clay (a red montmorillonite sample, green kaolinite an illite sample) at five salinities...
The hydroelectric coupling generating self‐potential anomalies recorded on the Earth's surface has received a considerable attention in last four years. Geophysical applications include use of this phenomenon for mapping subsurface fluid flow, study hydrothermal activity, and to monitor volcanic activity possibility, still debated, seismic forecasting through electromagnetic precursors electrokinetic nature. We model here two key‐parameters relevant clayey porous rocks. These parameters are...
Abstract Understanding streaming potential generation in porous media is of high interest for hydrological and reservoir studies as it allows to relate water fluxes measurable electrical distributions. This results from an electrokinetic coupling due the presence double layer developing at interface between minerals pore water. Therefore, sizes medium are expected play important role generation. In this work we use 2‐D network simulations study effect size distribution upon mechanism. Our...