Heat transition for major communities supported by geothermal energy development of the Alberta Basin, Canada

Majorowicz, Jacek; Grasby, Stephen E.

doi:10.1016/j.geothermics.2020.101883

Cited by 18 publications

(9 citation statements)

References 27 publications

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“…The time-dependent mechanical behavior (e.g., creep) of rock plays an important role in the safety and stability of deep underground engineering, such as deep-buried tunnels, geothermal energy development, and radioactive nuclear waste disposal. [1][2][3] In particular, deep underground engineering is mostly in a complex environment of high confining pressure, high temperature, and high pore pressure. [4][5][6] Therefore, it is important to study the creep properties of rock under a complex environment.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on triaxial creep behavior of red sandstone under different pore pressures based on ultrasonic measurement

Zhou

Shen

Berto

2022

Fatigue Fract Eng Mat Struct

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Creep behavior of red sandstone under different pore pressures with a high temperature and confining pressure condition is studied in this paper. Ultrasonic detection method is used to monitor the variation of S wave in the creep test. The attenuation coefficient and S-wave velocity in the creep process are analyzed. Fast Fourier transform is used to analyze the variation of amplitude in peak frequency and four main frequencies. The experimental results show that the creep deformation increases with increasing pore pressure for a given deviatoric stress, and the S-wave velocity and attenuation coefficient decrease with increasing pore pressure. The relationship between creep strain and damage of the sample is established. It is found that the increase of pore pressure accelerates the increased rate of sample damage. Frequency spectrum analysis shows that the generation and development rate of microcracks increases with increasing pore pressure. The research can provide a theoretical basis for mining of deep mineral resources and the structural stability analysis of deep underground engineering.

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Section: Introductionmentioning

confidence: 99%

Experimental study on triaxial creep behavior of red sandstone under different pore pressures based on ultrasonic measurement

Zhou

Shen

Berto

2022

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…Several studies where temperature profiles are measured are typically used for qualitative interpretations of the effects of anthropogenic stressors (Benz et al, 2018;Dong et al, 2018) and for evaluation of deep (i.e. hundreds to thousands of meters) geothermal activities where substantial temperature variations occur (Dentzer et al, 2017;Majorowicz and Grasby, 2020;Marty et al, 2020;Sippel et al, 2013;Smith and Elmore, 2019). Little research has however been devoted to exploring the use of temperature in aquifers with depths in the range of a few tens of meters, up to a few hundred meters, in which the temperature range is rather limited (up to a maximum of ±10 degrees).…”

Section: Introductionmentioning

confidence: 99%

Characterizing groundwater heat-transport in a complex lowland aquifer using paleo-temperature reconstruction, satellite data, temperature-depth profiles, and numerical models

Casillas-Trasvina

Rogiers

Beerten

et al. 2022

Preprint

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Abstract. Heat is a naturally occurring widespread groundwater tracer that can be used to identify flow patterns in groundwater systems. Temperature measurements, being relatively inexpensive and effortless to gather, represent a valuable source of information which can be exploited to reduce uncertainties on groundwater flow, and e.g. support performance assessment studies on waste disposal sites. In a lowland setting, however, hydraulic gradients are typically small, and whether temperature measurements can be used to inform us about catchment-scale groundwater flow remains an open question. For the Neogene aquifer in Flanders, groundwater flow and solute transport models have been developed in the framework of safety and feasibility studies for the underlying Boom Clay Formation as potential host rock for geological disposal of radioactive waste. However, the simulated fluxes by these models are still subject to large uncertainties, as they are typically constrained by hydraulic heads only. In the current study we use a state-of-the-art 3D steady-state groundwater flow model, calibrated against hydraulic head measurements, to build a 3D transient heat-transport model, for assessing the use of heat as an additional state variable, in a lowland setting, at the catchment scale. We therefore use temperature-depth (TD) profiles as additional state variable observations for inverse conditioning. Furthermore, a Holocene paleo-temperature time curve was constructed based on paleo-temperature reconstructions in Europe from several sources in combination with land-surface temperature (LST) imagery remote sensing monthly data from 2001 to 2019 (retrieved from NASA’s MODIS). The aim of the research is to understand the mechanisms of heat transport and to characterize the temperature distribution and dynamics in the Neogene aquifer. The simulation results clearly underline advection/convection and conduction as the major heat transport mechanisms, with a reduced role of advection/convection in zones where flux magnitudes are low, which suggests temperature is a useful indicator also in a lowland setting. Furthermore, performed scenarios highlight the important roles of i) surface hydrological features and withdrawals driving local groundwater flow systems, and ii) the inclusion of subsurface features like faults in the conceptualization and development of hydrogeological investigations. These findings serve as a proxy of the influence of advective transport and barrier/conduit role of faults, particularly the Rauw Fault in this case, and suggest that solutes released from the Boom Clay might be affected in similar ways.

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“…Several studies in which temperature profiles are measured are typically used for qualitative interpretations of the effects of anthropogenic stressors (Benz et al, 2018;Dong et al, 2018) and for the evaluation of deep (i.e. hundreds to thousands of metres) geothermal activities where substantial temperature variations occur (Dentzer et al, 2017;Majorowicz and Grasby, 2020;Marty et al, 2020;Sippel et al, 2013;Smith and Elmore, 2019). Little research has, however, been devoted to exploring the use of temperature in aquifers with depths in the range of a few tens of metres up to a few hundreds of metres in which the temperature range is rather limited (up to a maximum of ±10 • C).…”

Section: Introductionmentioning

confidence: 99%

Characterizing groundwater heat transport in a complex lowland aquifer using paleo-temperature reconstruction, satellite data, temperature–depth profiles, and numerical models

Casillas-Trasvina

Rogiers²,

Beerten³

et al. 2022

Hydrol. Earth Syst. Sci.

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Abstract. Heat is a naturally occurring, widespread groundwater tracer that can be used to identify flow patterns in groundwater systems. Temperature measurements, being relatively inexpensive and effortless to gather, represent a valuable source of information which can be exploited to reduce uncertainties on groundwater flow, and, for example, support performance assessment studies on waste disposal sites. In a lowland setting, however, hydraulic gradients are typically small, and whether temperature measurements can be used to inform us about catchment-scale groundwater flow remains an open question. For the Neogene Aquifer in Flanders, groundwater flow and solute transport models have been developed in the framework of safety and feasibility studies for the underlying Boom Clay formation as a potential host rock for geological disposal of radioactive waste. However, the simulated fluxes by these models are still subject to large uncertainties as they are typically constrained by hydraulic heads only. In the current study, we use a state-of-the-art 3D steady-state groundwater flow model, calibrated against hydraulic head measurements, to build a 3D transient heat transport model, for assessing the use of heat as an additional state variable, in a lowland setting and at the catchment scale. We therefore use temperature–depth (TD) profiles as additional state variable observations for inverse conditioning. Furthermore, a Holocene paleo-temperature time curve was constructed based on paleo-temperature reconstructions in Europe from several sources in combination with land surface temperature (LST) remotely sensed monthly data from 2001 to 2019 (retrieved from NASA's Moderate Resolution Imaging Spectroradiometer, MODIS). The aim of the research is to understand the mechanisms of heat transport and to characterize the temperature distribution and dynamics in the Neogene Aquifer. The simulation results clearly underline advection/convection and conduction as the major heat transport mechanisms, with a reduced role of advection/convection in zones where flux magnitudes are low, which suggests that temperature is also a useful indicator in a lowland setting. Furthermore, the performed scenarios highlight the important roles of (i) surface hydrological features and withdrawals driving local groundwater flow systems and (ii) the inclusion of subsurface features like faults in the conceptualization and development of hydrogeological investigations. These findings serve as a proxy of the influence of advective transport and barrier/conduit role of faults, particularly for the Rauw fault in this case, and suggest that solutes released from the Boom Clay might be affected in similar ways.

show abstract

Heat transition for major communities supported by geothermal energy development of the Alberta Basin, Canada

Cited by 18 publications

References 27 publications

Experimental study on triaxial creep behavior of red sandstone under different pore pressures based on ultrasonic measurement

Experimental study on triaxial creep behavior of red sandstone under different pore pressures based on ultrasonic measurement

Characterizing groundwater heat-transport in a complex lowland aquifer using paleo-temperature reconstruction, satellite data, temperature-depth profiles, and numerical models

Characterizing groundwater heat transport in a complex lowland aquifer using paleo-temperature reconstruction, satellite data, temperature–depth profiles, and numerical models

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