EXCITING
EXploring geological resourCes and reservoir Integrity by geophysical prospecTING of clay properties from nano to field scale
EXCITING is funded by a grant from the French National Research Agency (ANR) from 2018 to 2022 (680k€)
A full energetic transition from traditional hydrocarbon resources to carbon free energy needs smart and safe underground use. In addition to being a source of geothermal energy, the subsurface is a vast 3D space that can be used in a carefully planned way for the management of carbon-free energies through the geological storage of CO2 and various other forms of energy vectors (e.g., H2, heat, compressed air). For a safe and efficient exploitation of all natural resources (e.g., geothermal energy, hydrocarbon, minerals) or underground storage, one critical effort is to identify, characterize, and monitor natural clayey cap rock overlying a target (resource reservoir or storage volume), which plays an essential role in risk reduction (e.g., water table contamination, substances upward leakage) due to their low permeability. Characterization of clayey rocks is thus a key issue in this context. Focusing on this geological formation allows reducing a great part of geotechnologies issues.
The main objective of the project is to improve the characterization of the complex and frequency dependence of electrical properties of different clays minerals and mixtures. For that purpose, we intend to closely combine measurements, modeling and inversion tools at different scales (from nano to pluri-m) in parallel to instrumental development. This work will require the development of upscaling procedures, from the mineral/water interface (nano/micrometric) to the field scale (decametric to kilometric). Laboratory experiments using Spectral Induced Polarization (SIP) and multi-scale simulations will be conducted in order to validate the upscaling relationships developed theoretically. These models will be included in an existing inversion code in order to characterize the complex electrical conductivity (chargeability) more precisely after inversion. In parallel, we aim at improving the reliability of EM imaging at depth based on Controlled Source EM (CSEM) by resolving the surface heterogeneities “static” effects which often deteriorates the imaging capabilities deeper. We will develop a new prototype of EM Induction device (EMI) in order to image densely over large zone the shallow earth (from deca to hectometers). This project will help to push further the use of geophysical methods for the characterization of clayey cap rocks.
Started in February 2018, the EXCITING project will run until July 2022.
Peer-reviewed publications from the project :
Bretaudeau, F., F Dubois, S-G Bissavetsy Kassa, N Coppo, P Wawrzyniak, M Darnet, (2021) Time-lapse resistivity imaging: CSEM-data 3-D double-difference inversion and application to the Reykjanes geothermal field, Geophysical Journal International, 226(3), 1764–1782, https://doi.org/10.1093/gji/ggab172
Cosenza P. , A. L. Fauchille, D. Prêt, S. Hedan, A. Giraud (2019) Statistical representative elementary area of shale inferred by micromechanics. International Journal of Engineering Science, 142, 53.
Cosenza, P., Prêt, D., Fauchille, A. L., & Hedan, S. (2019). Representative elementary area of shale at the mesoscopic scale. International Journal of Coal Geology, 216, 103316.
Cosenza, P., Giot, R., Giraud, A., & Hedan, S. (2021). A fractional differential scheme for the effective transport properties of multiscale reactive porous media: Applications to clayey geomaterials. International Journal for Numerical and Analytical Methods in Geomechanics.
Delayre, C., Mas, P. P., Sardini, P., Cosenza, P., & Thomas, A. (2020). Quantitative evolution of the petrophysical properties of andesites affected by argillic alteration in the hydrothermal system of Petite Anse-Diamant, Martinique. Journal of Volcanology and Geothermal Research, 401, 106927.
Giraud, A., Sevostianov, I., Kushch, V. I., Cosenza, P., Prêt, D., Barthélémy, J. F., Trofimov, A. (2019). Effective electrical conductivity of transversely isotropic rocks with arbitrarily oriented ellipsoidal inclusions. Mechanics of Materials, 133, 174-192.
Girard, J-F., C. Jodry and P.-D. Matthey, (2019) On-site characterization of the spatio-temporal structure of the noise for MRS measurements using a pair of eight-shape loops, Journal of Applied Geophysics, https://doi.org/10.1016/j.jappgeo.2020.104075
Guarracino, L., Jougnot, D. (2022). A fractal model for effective excess charge density in variably saturated fractured rocks. Journal of Geophysical Research: Solid Earth, 127, e2021JB022982. https://doi.org/10.1029/2021JB022982.
Jougnot D., A. Mendieta, P. Leroy, A. Maineult (2019) Exploring the effect of the pore size distribution on the streaming potential generation in saturated porous media, insight from pore network simulations, Journal of Geophysical Research - Solid Earth, 124(6), 5315-5335, doi:10.1029/2018JB017240.
Lajaunie, M., Gance, J., Nevers, P., et al. (2019) Structure of the Séchilienne unstable slope from large-scale three-dimensional electrical tomography using a Resistivity Distributed Automated System (R-DAS). Geophysical Journal International, 219(1), 129-147.
Mendieta, A. (2021) Experimental and numerical characterization of clay material using spectral induced polarization, PhD Thesis, Sorbonne University, Paris, France. http://www.theses.fr/259021962
Mendieta A., D. Jougnot, P. Leroy, A. Maineult (2021) Spectral induced polarization characterization of non-consolidated clays for varying salinities - an experimental study, Journal of Geophysical Research: Solid Earth, 126(4), e2020JB021125, doi:10.1029/2020JB021125.
Mendieta, A., Maineult, A., Leroy, P., Jougnot, D. (2023) Spectral induced polarization of heterogeneous non-consolidated clays, Geophysical Journal International, 233(1), 436–447, doi:10.1093/gji/ggac466.
Porté, J. (2021) Imagerie 3-D de la résistivité complexe à partir de données électromagnétiques à source contrôlée [Thèse de doctorat, Université de Strasbourg, France]. http://www.theses.fr/262397684
Porté, J., Bretaudeau, F., Girard, J-F., (2022) Three-dimensional complex resistivity imaging using controlled source electromagnetic data: a multi-stage procedure using a 2nd order polynomial parametrization, Geophysical Journal International.
Thanh, L. D., Jougnot, D., Van Do, P., Mendieta, A., Ca, N. X., Hoa, V. X, Hien, N. T. (2020) Electroosmotic coupling in porous media, a new model based on a fractal upscaling procedure, Transport in Porous Media, 134, 249–274, doi:10.1007/s11242-020-01444-7.
