A microfluidic chip for geoelectrical monitoring of critical zone processes

Rembert, Flore; Stolz, Arnaud; Soulaine, Cyprien; Roman, Sophie

doi:10.1039/d3lc00377a

Cited by 10 publications

(2 citation statements)

References 68 publications

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“…Recent micro-and milli-fluidic investigations shed light on possible underlying IP processes at play. During calcite dissolution, the growth and transport of CO 2 gas bubbles create two-phase flow conditions, which may be responsible for a decrease of the quadrature conductivity, and a sequence of increase-decrease-increase of the in-phase conductivity (Rembert et al, 2023). During calcite precipitation, a strong increase in quadrature conductivity, only observed at the late stages of calcite precipitation, is attributed to pore space closing rather than mineral growth itself (Izumoto et al, 2022).…”

Section: Can the Ip-logging Methods Be Applied For Monitoring Other R...mentioning

confidence: 99%

Understanding the Fate of H₂S Injected in Basalts by Means of Time‐Domain Induced Polarization Geophysical Logging

Lévy,

Ciraula,

Legros

et al. 2024

JGR Solid Earth

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To help meet emission standards, hydrogen sulfide (H2S) from geothermal production may be injected back into the subsurface, where basalt offers, in theory, the capacity to mineralize H2S into pyrite. Ensuring the viability of this pollution mitigation technology requires information on how much H2S is mineralized, at what rate and where. To date, monitoring efforts of field‐scale H2S reinjection have mostly occurred via mass balance calculations, typically capturing less than 5% of the injected fluid. While these studies, along with laboratory experiments and geochemical models, conclude effective H2S mineralization, their extrapolation to quantify mineralization and its persistence over time leads to considerable uncertainty. Here, a geophysical methodology, using time‐domain induced polarization (TDIP) logging in two of the injection wells (NN3 and NN4), is developed as a complementary tool to follow the fate of H2S re‐injected at Nesjavellir geothermal site (Iceland). Results show a strong chargeability increase at +40 days, interpreted as precipitation of up to 2 vol.% based on laboratory relationships. A uniform increase is observed along NN4, whereas it is localized below 450 m in NN3. Changes are more pronounced with larger electrode spacing, indicating that pyrite precipitation takes place away from the wells. Furthermore, a chargeability decrease is observed at later monitoring rounds in both wells, suggesting that pyrite is either passivated or re‐dissolved after precipitating. These results highlight that a sequence of overlapping reactive processes (pyrite precipitation, passivation, pore clogging and possibly pyrite re‐dissolution) results from H2S injection and that TDIP monitoring is sensitive to this sequence.

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Section: Can the Ip-logging Methods Be Applied For Monitoring Other R...mentioning

confidence: 99%

Understanding the Fate of H₂S Injected in Basalts by Means of Time‐Domain Induced Polarization Geophysical Logging

Lévy,

Ciraula,

Legros

et al. 2024

JGR Solid Earth

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“…The recent advances in time-lapse microtomography will provide three-dimensional images of the evolution of dissolution patterns (Ott & Oedai, 2015). Reactive microfluidics is also a promising technique to verify the robustness of the model (Osselin et al, 2016;Rembert et al, 2023;Song et al, 2014).…”

Section: Wormholes Formation In Acidic Environmentsmentioning

confidence: 99%

Micro‐Continuum Modeling: An Hybrid‐Scale Approach for Solving Coupled Processes in Porous Media

Soulaine

2024

Water Resources Research

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Micro‐continuum models are versatile and powerful approaches for simulating coupled processes in two‐scale porous systems. Initially oriented for modeling static single‐phase flow in microtomography images with sub‐voxel porosity, the concept has been extended over the years to multi‐phase flow, reactive transport, and poromechanics. This paper introduces an integrated micro‐continuum framework to model coupled processes in porous media. It reviews state‐of‐the‐art models and discusses applications in geosciences including Digital Rock Physics with sub‐voxel porosity, moving fluid‐solid interface at the pore‐scale due to geochemical reactions, fracture‐matrix interactions, and solid deformation. Finally, the paper discusses future developments in micro‐continuum models.

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Electrical conductivity model for reactive porous media under partially saturated conditions with hysteresis effects

Soldi,

Rembert,

Guarracino

et al. 2024

Advances in Water Resources

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A microfluidic chip for geoelectrical monitoring of critical zone processes

Abstract: A flow-through microfluidic channel is equipped with miniaturized electrodes to investigate calcite dissolution. Microscale visual detection aids in the interpretation of spectral induced polarization (SIP) monitoring.

Cited by 10 publications

References 68 publications

Understanding the Fate of H₂S Injected in Basalts by Means of Time‐Domain Induced Polarization Geophysical Logging

Understanding the Fate of H₂S Injected in Basalts by Means of Time‐Domain Induced Polarization Geophysical Logging

Micro‐Continuum Modeling: An Hybrid‐Scale Approach for Solving Coupled Processes in Porous Media

Electrical conductivity model for reactive porous media under partially saturated conditions with hysteresis effects

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A microfluidic chip for geoelectrical monitoring of critical zone processes

Abstract: A flow-through microfluidic channel is equipped with miniaturized electrodes to investigate calcite dissolution. Microscale visual detection aids in the interpretation of spectral induced polarization (SIP) monitoring.

Cited by 10 publications

References 68 publications

Understanding the Fate of H2S Injected in Basalts by Means of Time‐Domain Induced Polarization Geophysical Logging

Understanding the Fate of H2S Injected in Basalts by Means of Time‐Domain Induced Polarization Geophysical Logging

Micro‐Continuum Modeling: An Hybrid‐Scale Approach for Solving Coupled Processes in Porous Media

Electrical conductivity model for reactive porous media under partially saturated conditions with hysteresis effects

Contact Info

Product

Resources

About

Understanding the Fate of H₂S Injected in Basalts by Means of Time‐Domain Induced Polarization Geophysical Logging

Understanding the Fate of H₂S Injected in Basalts by Means of Time‐Domain Induced Polarization Geophysical Logging