Land CSEM Simulations and Experimental Test Using Metallic Casing in a Geothermal Exploration Context: Vallès Basin (NE Spain) Case Study

Controlled-source electromagnetic (CSEM) measurements are complementary data for magnetotelluric (MT) characterization although its methodology on land is not sufficiently developed and tested as in marine environments. Acquiring expertise in CSEM is crucial for surveys in places where MT cannot be...

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Autores: Castillo Reyes, Octavio, Queralt i Capdevila, Pilar, Marcuello Pascual, Alejandro, Ledo Fernández, Juanjo
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2021
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/183608
Acceso en línea:https://hdl.handle.net/2445/183608
Access Level:acceso abierto
Palabra clave:Prospecció geofísica
Prospecció magnetotel·lúrica
Electromagnetisme
Geophysical exploration
Magnetotelluric prospecting
Electromagnetism
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spelling Land CSEM Simulations and Experimental Test Using Metallic Casing in a Geothermal Exploration Context: Vallès Basin (NE Spain) Case StudyCastillo Reyes, OctavioQueralt i Capdevila, PilarMarcuello Pascual, AlejandroLedo Fernández, JuanjoProspecció geofísicaProspecció magnetotel·lúricaElectromagnetismeGeophysical explorationMagnetotelluric prospectingElectromagnetismControlled-source electromagnetic (CSEM) measurements are complementary data for magnetotelluric (MT) characterization although its methodology on land is not sufficiently developed and tested as in marine environments. Acquiring expertise in CSEM is crucial for surveys in places where MT cannot be performed due to high levels of cultural noise. To acquire that expertise, we perform CSEM experiments in the Vallès fault [Northeast (NE), Spain], where MT results have been satisfactory and allow us to verify the CSEM results. The Vallès basin is relevant for potential heat generation because of the presence of several geothermal anomalies and its nearby location in urban areas. In this article, we present the experimental setup for that region, a 2-D joint MT+CSEM inverse model, several 3-D CSEM simulations in the presence of metallic casing, and its comparison with real data measurements. We employ a parallel and high-order vector finite element algorithm to discretize the governing equations. By using an adapted meshing strategy, different scenarios are simulated to study the influence of the source position/direction and the conductivity model in a metallic casing presence. An excellent agreement between the simulated data and analytical/real field data demonstrates the feasibility of study metallic structures in realistic configurations. Our numerical results confirm that metallic casing strongly influences electromagnetic (EM) responses, making surface measurements more sensitive to resistivity variations near the metallic structure. It could be beneficial getting higher signal-to-noise ratios and sensitivity to deep targets. However, such a casing effect depends on the input model (e.g., conductivity contrasts, frequency, and geometry).Institute of Electrical and Electronics Engineers (IEEE)2021info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://hdl.handle.net/2445/183608Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésVersió postprint del document publicat a: https://doi.org/10.1109/TGRS.2021.3069042IEEE Transactions on Geoscience and Remote Sensing, 2021, vol. 60, num. 4501813https://doi.org/10.1109/TGRS.2021.3069042info:eu-repo/grantAgreement/EC/H2020/828947info:eu-repo/grantAgreement/EC/H2020/777778(c) Institute of Electrical and Electronics Engineers (IEEE), 2021info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1836082026-05-27T06:46:51Z
dc.title.none.fl_str_mv Land CSEM Simulations and Experimental Test Using Metallic Casing in a Geothermal Exploration Context: Vallès Basin (NE Spain) Case Study
title Land CSEM Simulations and Experimental Test Using Metallic Casing in a Geothermal Exploration Context: Vallès Basin (NE Spain) Case Study
spellingShingle Land CSEM Simulations and Experimental Test Using Metallic Casing in a Geothermal Exploration Context: Vallès Basin (NE Spain) Case Study
Castillo Reyes, Octavio
Prospecció geofísica
Prospecció magnetotel·lúrica
Electromagnetisme
Geophysical exploration
Magnetotelluric prospecting
Electromagnetism
title_short Land CSEM Simulations and Experimental Test Using Metallic Casing in a Geothermal Exploration Context: Vallès Basin (NE Spain) Case Study
title_full Land CSEM Simulations and Experimental Test Using Metallic Casing in a Geothermal Exploration Context: Vallès Basin (NE Spain) Case Study
title_fullStr Land CSEM Simulations and Experimental Test Using Metallic Casing in a Geothermal Exploration Context: Vallès Basin (NE Spain) Case Study
title_full_unstemmed Land CSEM Simulations and Experimental Test Using Metallic Casing in a Geothermal Exploration Context: Vallès Basin (NE Spain) Case Study
title_sort Land CSEM Simulations and Experimental Test Using Metallic Casing in a Geothermal Exploration Context: Vallès Basin (NE Spain) Case Study
dc.creator.none.fl_str_mv Castillo Reyes, Octavio
Queralt i Capdevila, Pilar
Marcuello Pascual, Alejandro
Ledo Fernández, Juanjo
author Castillo Reyes, Octavio
author_facet Castillo Reyes, Octavio
Queralt i Capdevila, Pilar
Marcuello Pascual, Alejandro
Ledo Fernández, Juanjo
author_role author
author2 Queralt i Capdevila, Pilar
Marcuello Pascual, Alejandro
Ledo Fernández, Juanjo
author2_role author
author
author
dc.subject.none.fl_str_mv Prospecció geofísica
Prospecció magnetotel·lúrica
Electromagnetisme
Geophysical exploration
Magnetotelluric prospecting
Electromagnetism
topic Prospecció geofísica
Prospecció magnetotel·lúrica
Electromagnetisme
Geophysical exploration
Magnetotelluric prospecting
Electromagnetism
description Controlled-source electromagnetic (CSEM) measurements are complementary data for magnetotelluric (MT) characterization although its methodology on land is not sufficiently developed and tested as in marine environments. Acquiring expertise in CSEM is crucial for surveys in places where MT cannot be performed due to high levels of cultural noise. To acquire that expertise, we perform CSEM experiments in the Vallès fault [Northeast (NE), Spain], where MT results have been satisfactory and allow us to verify the CSEM results. The Vallès basin is relevant for potential heat generation because of the presence of several geothermal anomalies and its nearby location in urban areas. In this article, we present the experimental setup for that region, a 2-D joint MT+CSEM inverse model, several 3-D CSEM simulations in the presence of metallic casing, and its comparison with real data measurements. We employ a parallel and high-order vector finite element algorithm to discretize the governing equations. By using an adapted meshing strategy, different scenarios are simulated to study the influence of the source position/direction and the conductivity model in a metallic casing presence. An excellent agreement between the simulated data and analytical/real field data demonstrates the feasibility of study metallic structures in realistic configurations. Our numerical results confirm that metallic casing strongly influences electromagnetic (EM) responses, making surface measurements more sensitive to resistivity variations near the metallic structure. It could be beneficial getting higher signal-to-noise ratios and sensitivity to deep targets. However, such a casing effect depends on the input model (e.g., conductivity contrasts, frequency, and geometry).
publishDate 2021
dc.date.none.fl_str_mv 2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/183608
url https://hdl.handle.net/2445/183608
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1109/TGRS.2021.3069042
IEEE Transactions on Geoscience and Remote Sensing, 2021, vol. 60, num. 4501813
https://doi.org/10.1109/TGRS.2021.3069042
info:eu-repo/grantAgreement/EC/H2020/828947
info:eu-repo/grantAgreement/EC/H2020/777778
dc.rights.none.fl_str_mv (c) Institute of Electrical and Electronics Engineers (IEEE), 2021
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Institute of Electrical and Electronics Engineers (IEEE), 2021
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Institute of Electrical and Electronics Engineers (IEEE)
publisher.none.fl_str_mv Institute of Electrical and Electronics Engineers (IEEE)
dc.source.none.fl_str_mv Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300724

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