Self-potential as a tool to assess groundwater flow in hydrothermal systems: A review

Revil, A.; Finizola, Anthony; Gresse, Marceau

doi:10.1016/j.jvolgeores.2023.107788

Cited by 17 publications

(4 citation statements)

References 117 publications

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“…SP primary sources) through fault/fracture systems and/or high permeability zones [Ref. 55 and references therein]. The winter SP map (Fig.…”

Section: Resultsmentioning

confidence: 99%

High-resolution geoelectrical characterization and monitoring of natural fluids emission systems to understand possible gas leakages from geological carbon storage reservoirs

Salone,

De Paola,

Carbonari

et al. 2023

Sci Rep

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Gas leakage from deep geologic storage formations to the Earth’s surface is one of the main hazards in geological carbon sequestration and storage. Permeable sediment covers together with natural pathways, such as faults and/or fracture systems, are the main factors controlling surface leakages. Therefore, the characterization of natural systems, where large amounts of natural gases are released, can be helpful for understanding the effects of potential gas leaks from carbon dioxide storage systems. In this framework, we propose a combined use of high-resolution geoelectrical investigations (i.e. resistivity tomography and self-potential surveys) for reconstructing shallow buried fracture networks in the caprock and detecting preferential gas migration pathways before it enters the atmosphere. Such methodologies appear to be among the most suitable for the research purposes because of the strong dependence of the electrical properties of water-bearing permeable rock, or unconsolidated materials, on many factors relevant to CO2 storage (i.e. porosity, fracturing, water saturation, etc.). The effectiveness of the suggested geoelectrical approach is tested in an area of natural gas degassing (mainly CH4) located in the active fault zone of the Bolle della Malvizza (Southern Apennines, Italy), which could represent a natural analogue of gas storage sites due to the significant thicknesses (hundreds of meters) of impermeable rock (caprock) that is generally required to prevent carbon dioxide stored at depth from rising to the surface. The obtained 3D geophysical model, validated by the good correlation with geochemical data acquired in the study area and the available geological information, provided a structural and physical characterization of the investigated subsurface volume. Moreover, the time variations of the observed geophysical parameters allowed the identification of possible migration pathways of fluids to the surface.

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“…SP primary sources) through fault/fracture systems and/or high permeability zones [Ref. 55 and references therein]. The winter SP map (Fig.…”

Section: Resultsmentioning

confidence: 99%

High-resolution geoelectrical characterization and monitoring of natural fluids emission systems to understand possible gas leakages from geological carbon storage reservoirs

Salone,

De Paola,

Carbonari

et al. 2023

Sci Rep

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“…The electrical fields are related to the electrical potential by E = −∇ϕ. The electrical potential therefore obeys an elliptic equation given by [26],…”

Section: Forward Analysis Of the Self-potential Signalsmentioning

confidence: 99%

Self-Potential as a Tool to Monitor Redox Reactions at an Ore Body: A Sandbox Experiment

Revil

Zhu

et al. 2023

Minerals

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Ore bodies generate natural electrical fields that are measurable at the ground surface. The ground surface signature of this electrical field is called a self-potential anomaly. We developed a sandbox experiment to monitor the evolution of a self-potential anomaly associated with redox processes mediated by bacterial activity at the surface of a buried metallic object crossing the water table. A Bio-Electrochemical Cell (BEC) is formed by a metal bar connecting the upper, oxygen-rich, part of the tank and an aquifer containing an electron donor in the form of acetate. The self-potential response was observed during a period of 327 days. The tomography of the self-potential signature confirms that self-potential tomography is able to locate the metallic target acting as a BEC. In addition, we performed redox potential, pH, and electrical potential measurements over a vertical cross-section of the tank at several time steps to obtain an idea of where the redox front is located. The distributions of the redox potential and pH further demonstrated the development of the oxidation-reduction chemical processes facilitated by the BEC as bacterial communities developed around the metallic bar. The electrical potential anomaly shows that the bacterial communities followed a short period of exponential growth, then a longer period of a sustained population. These results demonstrate the usefulness of the self-potential method in monitoring redox processes at the surface of a buried ore body. Further works will need to combine such self-potential anomalies with induced polarization anomalies through joint inversion.

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“…Quantifying thermal upwelling water using SP measurements [56] Review on SP as a tool to asses groundwater flow in hydrothermal systems [146] Combining DCR, SP, and seismic measurements to map the source location and transporting faults of a thermal hot spring [139] Table A5. Literature on inverse modeling of geoelectrical measurements regarding groundwater flow velocity.…”

Section: Groundwater Flowmentioning

confidence: 99%

Measuring Groundwater Flow Velocities near Drinking Water Extraction Wells in Unconsolidated Sediments

Bakx

Bense

Karaoulis

et al. 2023

Water

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Groundwater is an important source of drinking water in coastal regions with predominantly unconsolidated sediments. To protect and manage drinking water extraction wells in these regions, reliable estimates of groundwater flow velocities around well fields are of paramount importance. Such measurements help to identify the dynamics of the groundwater flow and its response to stresses, to optimize water resources management, and to calibrate groundwater flow models. In this article, we review approaches for measuring the relatively high groundwater flow velocity measurements near these wells. We discuss and review their potential and limitations for use in this environment. Environmental tracer measurements are found to be useful for regional scale estimates of groundwater flow velocities and directions, but their use is limited near drinking water extraction wells. Surface-based hydrogeophysical measurements can potentially provide insight into groundwater flow velocity patterns, although the depth is limited in large-scale measurement setups. Active-heating distributed temperature sensing (AH-DTS) provides direct measurements of in situ groundwater flow velocities and can monitor fluctuations in the high groundwater flow velocities near drinking water extraction wells. Combining geoelectrical measurements with AH-DTS shows the potential to estimate a 3D groundwater flow velocity distribution to fully identify groundwater flow towards drinking water extraction wells.

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Self-potential as a tool to assess groundwater flow in hydrothermal systems: A review

Cited by 17 publications

References 117 publications

High-resolution geoelectrical characterization and monitoring of natural fluids emission systems to understand possible gas leakages from geological carbon storage reservoirs

High-resolution geoelectrical characterization and monitoring of natural fluids emission systems to understand possible gas leakages from geological carbon storage reservoirs

Self-Potential as a Tool to Monitor Redox Reactions at an Ore Body: A Sandbox Experiment

Measuring Groundwater Flow Velocities near Drinking Water Extraction Wells in Unconsolidated Sediments

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