Continuous Real‐Time Detection of H2, He, and 222Rn While Drilling DIVE‐1 Boreholes (ICDP) Indicates Deep Fracture Fluid Migration in Crystalline Rocks

Abstract The identification and real‐time monitoring of geofluids during drilling is crucial for safe drilling operations and can provide valuable insights into reservoir properties and fluid migration. While mud gas logging is well established in oil and gas exploration, recent interest in natural...

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Main Authors: H. Dutoit, L. Truche, F. V. Donzé, T. Wiersberg, M. L. Doan, J. Li, A. Greenwood, E. Caspari, N. Lefeuvre, J. Dominique, S. Auclair, L. Masci, G. Hetényi, M. Venier, O. Müntener, ICDP DIVE Science Team
Format: Article
Language:English
Published: Wiley 2025-05-01
Series:Geochemistry, Geophysics, Geosystems
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Online Access:https://doi.org/10.1029/2025GC012168
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author H. Dutoit
L. Truche
F. V. Donzé
T. Wiersberg
M. L. Doan
J. Li
A. Greenwood
E. Caspari
N. Lefeuvre
J. Dominique
S. Auclair
L. Masci
G. Hetényi
M. Venier
O. Müntener
ICDP DIVE Science Team
author_facet H. Dutoit
L. Truche
F. V. Donzé
T. Wiersberg
M. L. Doan
J. Li
A. Greenwood
E. Caspari
N. Lefeuvre
J. Dominique
S. Auclair
L. Masci
G. Hetényi
M. Venier
O. Müntener
ICDP DIVE Science Team
author_sort H. Dutoit
collection DOAJ
description Abstract The identification and real‐time monitoring of geofluids during drilling is crucial for safe drilling operations and can provide valuable insights into reservoir properties and fluid migration. While mud gas logging is well established in oil and gas exploration, recent interest in natural hydrogen (H2) and helium (He) exploration has prompted the need for improved mud gas logging techniques for continuous wireline coring in crystalline bedrock. The detection of both H2 and He is particularly useful when exploring these two commodities but also for identifying deep fluid migration notably in crystalline bedrock. This study presents the results of mud gas logging of O2, N2, 40Ar, 38Ar, 36Ar, CO2, CH4, H2, He, and 222Rn from two boreholes (909.5 and 578.5 m deep) drilled in the Ivrea‐Verbano Zone (Northern Italy) as part of the DIVE‐ICDP project. Comparison with data from geophysical logging showed that gas peaks correlate well with variations in the physical characteristics of the well fluid, indicating zones of fluid inflow. Real‐time gas monitoring proved to be valuable for identifying deep gas migration and aiding decision‐making. Despite its potential, this technique faces challenges, such as distinguishing between formation‐derived and drilling‐induced gases. Complementary analyses, including isotopic studies, are recommended to refine source identification. Nevertheless, the correlation of He and H2 with CH4 and CO2 provides initial insights into their possible origins, making this method a promising tool for exploring H2 and He gases in deep geological formations.
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spelling doaj-art-db6e1085ed0b49ea94812c35cf0e28882025-08-20T03:25:27ZengWileyGeochemistry, Geophysics, Geosystems1525-20272025-05-01265n/an/a10.1029/2025GC012168Continuous Real‐Time Detection of H2, He, and 222Rn While Drilling DIVE‐1 Boreholes (ICDP) Indicates Deep Fracture Fluid Migration in Crystalline RocksH. Dutoit0L. Truche1F. V. Donzé2T. Wiersberg3M. L. Doan4J. Li5A. Greenwood6E. Caspari7N. Lefeuvre8J. Dominique9S. Auclair10L. Masci11G. Hetényi12M. Venier13O. Müntener14ICDP DIVE Science TeamISTerre USMB UGE CNRS IRD Universite Grenoble Alpes Grenoble FranceISTerre USMB UGE CNRS IRD Universite Grenoble Alpes Grenoble FranceISTerre USMB UGE CNRS IRD Universite Grenoble Alpes Grenoble FranceHelmholtz Centre Potsdam GFZ German Research Centre for Geosciences Potsdam GermanyISTerre USMB UGE CNRS IRD Universite Grenoble Alpes Grenoble FranceChair of Applied Geophysics Montanuniversität Leoben Leoben AustriaChair of Applied Geophysics Montanuniversität Leoben Leoben AustriaChair of Applied Geophysics Montanuniversität Leoben Leoben AustriaISTerre USMB UGE CNRS IRD Universite Grenoble Alpes Grenoble FranceISTerre USMB UGE CNRS IRD Universite Grenoble Alpes Grenoble FranceISTerre USMB UGE CNRS IRD Universite Grenoble Alpes Grenoble FranceISTerre USMB UGE CNRS IRD Universite Grenoble Alpes Grenoble FranceInstitute of Earth Sciences University of Lausanne (UNIL) Lausanne SwitzerlandInstitut für Geowissenschaften Johannes Gutenberg‐Universität Mainz Mainz GermanyInstitute of Earth Sciences University of Lausanne (UNIL) Lausanne SwitzerlandAbstract The identification and real‐time monitoring of geofluids during drilling is crucial for safe drilling operations and can provide valuable insights into reservoir properties and fluid migration. While mud gas logging is well established in oil and gas exploration, recent interest in natural hydrogen (H2) and helium (He) exploration has prompted the need for improved mud gas logging techniques for continuous wireline coring in crystalline bedrock. The detection of both H2 and He is particularly useful when exploring these two commodities but also for identifying deep fluid migration notably in crystalline bedrock. This study presents the results of mud gas logging of O2, N2, 40Ar, 38Ar, 36Ar, CO2, CH4, H2, He, and 222Rn from two boreholes (909.5 and 578.5 m deep) drilled in the Ivrea‐Verbano Zone (Northern Italy) as part of the DIVE‐ICDP project. Comparison with data from geophysical logging showed that gas peaks correlate well with variations in the physical characteristics of the well fluid, indicating zones of fluid inflow. Real‐time gas monitoring proved to be valuable for identifying deep gas migration and aiding decision‐making. Despite its potential, this technique faces challenges, such as distinguishing between formation‐derived and drilling‐induced gases. Complementary analyses, including isotopic studies, are recommended to refine source identification. Nevertheless, the correlation of He and H2 with CH4 and CO2 provides initial insights into their possible origins, making this method a promising tool for exploring H2 and He gases in deep geological formations.https://doi.org/10.1029/2025GC012168rock‐fluid interactionsgeochemistryborehole logginggas exploration
spellingShingle H. Dutoit
L. Truche
F. V. Donzé
T. Wiersberg
M. L. Doan
J. Li
A. Greenwood
E. Caspari
N. Lefeuvre
J. Dominique
S. Auclair
L. Masci
G. Hetényi
M. Venier
O. Müntener
ICDP DIVE Science Team
Continuous Real‐Time Detection of H2, He, and 222Rn While Drilling DIVE‐1 Boreholes (ICDP) Indicates Deep Fracture Fluid Migration in Crystalline Rocks
Geochemistry, Geophysics, Geosystems
rock‐fluid interactions
geochemistry
borehole logging
gas exploration
title Continuous Real‐Time Detection of H2, He, and 222Rn While Drilling DIVE‐1 Boreholes (ICDP) Indicates Deep Fracture Fluid Migration in Crystalline Rocks
title_full Continuous Real‐Time Detection of H2, He, and 222Rn While Drilling DIVE‐1 Boreholes (ICDP) Indicates Deep Fracture Fluid Migration in Crystalline Rocks
title_fullStr Continuous Real‐Time Detection of H2, He, and 222Rn While Drilling DIVE‐1 Boreholes (ICDP) Indicates Deep Fracture Fluid Migration in Crystalline Rocks
title_full_unstemmed Continuous Real‐Time Detection of H2, He, and 222Rn While Drilling DIVE‐1 Boreholes (ICDP) Indicates Deep Fracture Fluid Migration in Crystalline Rocks
title_short Continuous Real‐Time Detection of H2, He, and 222Rn While Drilling DIVE‐1 Boreholes (ICDP) Indicates Deep Fracture Fluid Migration in Crystalline Rocks
title_sort continuous real time detection of h2 he and 222rn while drilling dive 1 boreholes icdp indicates deep fracture fluid migration in crystalline rocks
topic rock‐fluid interactions
geochemistry
borehole logging
gas exploration
url https://doi.org/10.1029/2025GC012168
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