Workshop 2: Electrical Properties of Clay Rocks: Challenges and opportunities
Date: 29th August, 2021
Conveners: F. Bretaudeau (French Geological Survey), J.F. Girard (IPG Strasbourg), D. Jougnot (CNRS- Sorbonne Université), P. Leroy (French Geological Survey), C. Truffert (IRIS Instruments) and P. Cosenza (University of Poitiers IC2MP)
Description:
The aim of the workshop is to bring together geophysicists and clay scientists working on the characterization of the frequency dependence electrical properties of clays minerals, mixtures and clayey rocks. We welcome field, technical, experimental, or modeling contributions that address the following key issues. Can we:
- correctly model the clay electrical behavior at the pore scale?
- upscale DC resistivity or complex resistivity spectra at the laboratory scale to the EM geophysical exploration scale?
- develop petrophysical upscaling procedures, from the mineral/water interface (nano/micrometric) to the field scale (decametric to kilometric)?
- improve numerical modeling and inversion to allow quantitative interpretation of complex resistivity at field scale, up to several kilometers?
- develop new SIP and EM Induction devices in order to image densely over large zone the shallow earth subsurface (from deca to hectometers) particularly rich in clay materials?
Workshop Programme
| 09:30 | Welcome to the workshop |
| 09:45 | Session 1: Laboratory & Model: Nano to micro scale |
| 09:45 | Keynote presentation by M. Bücker (TU Braunschweig) |
| 10:20 | A Petrophysical Model for the Spectral Induced Polarization of Clays - P. Leroy (BRGM) |
| 10:55 | Coffee break |
| 11:15 | Contribution of the current research project ANR Exciting by JF. Girard (Univ. of Strasbourg) |
| 11:30 | Session 2: Laboratory & Model: Meso-scale |
| 11:30 | Experimental Characterization in Controlled Conditions at the Laboratory Scale - D. Jougnot (Sorbonne Univ.) |
| 12:00 | Clay Conductivity Modeling: Contributions of the DEM Theory - P. Cosenza (Univ. of Poitiers) |
| 12:30 | Lunch break |
| 13:55 | Session 3: Field & Imaging: Macro-scale |
| 13:55 | Keynote presentation by A. Flores Orozco (TU Wien) |
| 14:25 | Forward and Inverse EM Modeling - F. Bretaudeau & J. Porté (BRGM) |
| 14:55 | Instrumental Development, Signal Processing and Field Application - C. Truffert & J. Gance (IRIS Instruments) |
| 15:25 | Coffee break |
| 15:45 | Round table discussion & Meeting students, academics, companies |
| 17:00 | End of the day |