Geoenergy: new concepts for utilization of geo-reservoirs as potential energy sources

Scheck‐Wenderoth, Magdalena; Schmeißer, Dieter; Mutti, Maria; Kolditz, Olaf; Huenges, Ernst; Schultz, Hans-Martin; Liebscher, Axel; Bock, Michaela

doi:10.1007/s12665-013-2877-y

Cited by 8 publications

(4 citation statements)

References 35 publications

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“…Many scientists and engineers are seeking strategies and alternatives to counteract climate changes. Among others, green energies are being investigated by the research community; Geoenergy related applications, such as enhanced geothermal systems (EGS), are thought to have a critical role (e.g., Scheck-Wenderoth et al, 2013;Lu, 2018;Wu and Li, 2020). However, the injection or extraction of fluids in the subsurface is a well-known cause of perturbation of the effective stress of a rock formation (e.g., Hubbert and Rubey, 1959), which may eventually lead to induced seismicity (Majer et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

A Study of Progressive Failure in Porous Rocks Using Numerical and Experimental Modeling

Bianchi

Selvadurai

Vásquez

et al. 2022

56th U.S. Rock Mechanics/Geomechanics Symposium

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Physical mechanisms governing natural and induced earthquakes are still poorly understood and, despite the relevance, this lack of knowledge limits the usefulness of Geoenergy projects and severely undermines their societal acceptance. Due to the difficulty in retrieving direct measurements and observations to understand these important processes, we study laboratory acoustic emissions in combination with numerical models to shed light on the physics governing seismicity. A dry sample of Berea sandstone was tested to failure under a confining pressure of 40 MPa in a triaxial machine (LabQuake). Using in-house developed conical-type piezo-electric transducers, which are absolutely calibrated and exhibit a flat, broadband response between 100 kHz and 1.5 MHz, we are able to investigate the generated acoustic emission clouds by locating the single events and by inverting for their moment tensor solutions. Furthermore, numerical simulations are performed using a finite difference two-dimensional continuum-based fully coupled thermo-mechanical visco-elasto-plastic numerical modeling tool. We are able to image and locate regions of high stress and strain and, thus, to identify potential nucleation zones of seismic events and compare them at a first order with our experimental results.

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Section: Introductionmentioning

confidence: 99%

A Study of Progressive Failure in Porous Rocks Using Numerical and Experimental Modeling

Bianchi

Selvadurai

Vásquez

et al. 2022

56th U.S. Rock Mechanics/Geomechanics Symposium

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“…Spontaneous imbibition may feature local temperature spikes on the order of several Kelvin due to surface chemistry interaction between the fluid and the solid phase (Terzis et al 2017). Heat transfer in porous media also plays a crucial role in single-fluid-phase systems: In the face of global climate change, geothermal energy (Scheck-Wenderoth et al 2013;Praditia et al 2018) may become an essential contributor of clean and sustainable energy. Solar heat devices and air conditioning systems require efficient heat exchangers for which also porous media have been considered (Delalic et al 2004;Hutter et al 2011).…”

Section: Introductionmentioning

confidence: 99%

A (Dual) Network Model for Heat Transfer in Porous Media

et al. 2021

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We present a dual network model to simulate coupled single-phase flow and energy transport in porous media including conditions under which local thermal equilibrium cannot be assumed. The models target applications such as the simulation of catalytic reactors, micro-fluidic experiments, or micro-cooling devices. The new technique is based on a recently developed algorithm that extracts both the pore space and the solid grain matrix of a porous medium from CT images into an interconnected network representation. We simulate coupled heat and mass transfer in these networks simultaneously, allowing naturally to model scenarios with heterogeneous temperature distributions in both void space and solid matrix. The model is compared with 3D conjugate heat transfer simulations for both conduction- and convection-dominated scenarios. It is shown to reproduce effective thermal conductivities over a wide range of fluid to solid thermal conductivity ratios with a single parameter set. Morevoer, it captures local thermal nonequilibrium effects in a micro-cooling device scenario.

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“…A more comprehensive utilization of geo-reservoirs as a potential geoenergy resource was discussed in other related Thematic Issues in EES recently (Scheck-Wenderoth et al 2013;Nagel et al 2013), in particular the development of geothermal energy resources (Huenges et al 2013). New technologies for data mining, simulation and data visualization as continuous workflows became more important to terrestrial environmental research (Kolditz et al 2012;Bilke et al 2014).…”

mentioning

confidence: 99%