The role of deep closed-loop advanced geothermal systems in the future net-zero Swiss power systemMahmoud Hefny, Martin O. Saar2026 Peer-ReviewedDOI: 10.1016/j.apenergy.2026.127761[Cite]View Abstract
CO2-Plume Geothermal (CPG) after enhanced oil recovery (EOR)S. Kucuk, R. Farajzadeh, M. Brehme, W. Rossen, M. Saar2026 Peer-ReviewedGeoenergy Science and Engineering 257 URLDOI: 10.1016/j.geoen.2025.214261[Cite]View Abstract
GeoProp: A thermophysical property modelling framework for single and two-phase geothermal geofluidsT. Merbecks, A. Leal, P. Bombarda, P. Silva, D. Alfani, M. Saar2025 Peer-ReviewedGeothermics 125 URLDOI: 10.1016/j.geothermics.2024.103146[Cite]View Abstract
CCS coupled with CO2 plume geothermal operations: Enhancing CO2 sequestration and reducing risksK. Hau, M. Brehme, A. Rangriz Shokri, R. Malakooti, E. Nickel, R. Chalaturnyk, M. Saar2025 Peer-ReviewedGeothermics 133 URLDOI: 10.1016/j.geothermics.2025.103447[Cite]View Abstract
Reactivity of Wet scCO<sub>2</sub> toward Reservoir and Caprock Formations under Elevated Pressure and Temperature Conditions: Implications for CCS and CO<sub>2</sub>-Based Geothermal Energy ExtractionN. Rangel-Jurado, X. Kong, A. Kottsova, L. Grafulha Morales, N. Ma, F. Games, M. Brehme, S. Bernasconi, M. Saar2025 Peer-ReviewedEnergy & Fuels 39, 1679-1693 URLDOI: 10.1021/acs.energyfuels.4c04515[Cite]View Abstract
Mixing‐Induced Mineral Precipitation in Porous Media: Front Development and Its Impact on Flow and TransportA. Kottsova, X. Kong, P. Zitha, M. Saar, D. Bruhn, N. Knornschild, J. Allaz, C. Archer, M. Brehme2025 Peer-ReviewedWater Resources Research 61 URLDOI: 10.1029/2024wr039316[Cite]View Abstract
Comparison of CO2 Wellbore Flow Models Against CO2 Injection Field Data: Implications for CO2-based Geothermal Energy ExtractionHau, K.P., Brehme, M., Rangriz Shokri, A., Malakooti, R., Nickel, E., Chalaturnyk, R., Saar, M.O.2025 Peer-ReviewedProceedings of the European Geothermal Congress 2025 URL[Cite]View Abstract
Impact of Temperature on the Performance of Plasma-Pulse Geo-Drilling (PPGD)M. Ezzat, J. Börner, B. Kammermann, E. Rossi, B. Adams, V. Wittig, J. Biela, H. Schiegg, D. Vogler, M. Saar2024 Peer-ReviewedRock Mechanics and Rock Engineering 57, 3531-3542 URLDOI: 10.1007/s00603-023-03736-y[Cite]View Abstract
Paving the way for CO2-Plume Geothermal (CPG) systems: A perspective on the CO2 surface equipmentC. Schifflechner, J. de Reus, S. Schuster, A. Corpancho Villasana, D. Brillert, M. Saar, H. Spliethoff2024 Peer-ReviewedEnergy 305 URLDOI: 10.1016/j.energy.2024.132258[Cite]View Abstract
Analytical solutions to evaluate the geothermal energy generation potential from sedimentary-basin reservoirsD. Birdsell, B. Adams, P. Deb, J. Ogland-Hand, J. Bielicki, M. Fleming, M. Saar2024 Peer-ReviewedGeothermics 116 URLDOI: 10.1016/j.geothermics.2023.102843[Cite]View Abstract
The Dynamics of Per- and Polyfluoroalkyl Substances (PFAS) at Interfaces in Porous Media: A Computational Roadmap from Nanoscale Molecular Dynamics Simulation to Macroscale ModelingK. Sookhak Lari, G. Davis, A. Kumar, J. Rayner, X. Kong, M. Saar2024 Peer-ReviewedACS Omega 9, 5193-5202 URLDOI: 10.1021/acsomega.3c09201[Cite]View Abstract
Impact of Lithostatic Pressure on the Performance of Plasma-Pulse Geo-Drilling (PPGD)Ezzat, M., Beorner, J., Kammermann, B., Witting, V., Biela, J., Schiegg, Hans-O., Vogler, D., Saar, M.O.2024Rock Mechanics and Rock Engineering[Cite]View Abstract
Reactivity of wet scCO2 towards reservoir and caprock formations under elevated pressure and temperature conditions: Implications for CCS and CO2-based geothermal energy extractionRangel Jurado, N., Kong, X-Z., Kottsova, A., Grafulha Morales, L., Ma, N., Games, F., Brehme, M., Bernasconi, S.M., Saar, M.O.2024Unknown Source[Cite]View Abstract
Novel Directional Steel Shot Drilling Technology for Short-Radius Multilaterals – Field Application and Commercial ImpactA. Reinicke, P. Deb, M. Saar, V. Zikovic, V., E. Lassnig, M. Knebel, J. Blangé2023 URLDOI: 10.5194/egusphere-egu23-14928[Cite]View Abstract
Permeability evolution during pressure-controlled shear slip in saw-cut and natural granite fracturesZ. Li, X. Ma, X. Kong, M. Saar, D. Vogler2023 Peer-ReviewedRock Mechanics Bulletin 2 URLDOI: 10.1016/j.rockmb.2022.100027[Cite]View Abstract
Insights on the Interplay of Rifting, Transcrustal Magmatism and Formation of Geothermal Resources in the Central Segment of the Ethiopian Rift Revealed by 3‐D Magnetotelluric ImagingM. Dambly, F. Samrock, A. Grayver, M. Saar2023 Peer-ReviewedJournal of Geophysical Research: Solid Earth 128 URLDOI: 10.1029/2022jb025849[Cite]View Abstract
Geophysical imaging of the active magmatic intrusion and geothermal reservoir formation beneath the Corbetti prospect, Main Ethiopian RiftM. Dambly, F. Samrock, A. Grayver, H. Eysteinsson, M. Saar2023 Peer-ReviewedGeophysical Journal International 236, 1764-1781 URLDOI: 10.1093/gji/ggad493[Cite]View Abstract
Geophysically guided well siting at the Aluto-Langano geothermal reservoirF. Samrock, A. Grayver, M. Dambly, M. Müller, M. Saar2023 Peer-ReviewedGeophysics 88, WB105-WB114 URLDOI: 10.1190/geo2022-0617.1[Cite]View Abstract
Validating the Nernst–Planck transport model under reaction-driven flow conditions using RetroPy v1.0P. Huang, B. Flemisch, C. Qin, M. Saar, A. Ebigbo2023 Peer-ReviewedGeoscientific Model Development 16, 4767-4791 URLDOI: 10.5194/gmd-16-4767-2023[Cite]View Abstract
The potential of CO2-Plume Geothermal (CPG) Systems for CO2 component manufacturers: opportunities and development needsSchifflechner, C., de Reus, A.J., Hartmut, S., Saar, M.O.20237th International Seminar on ORC Power Systems URL[Cite]View Abstract
Experimental characterization of the chemical reactivity of wet scCO2 under elevated pressure and temperature conditionsRangel Jurado, N., Kong, X-Z., Kottsova, A., Brehme, M., Games, F., Saar, M.O.2023Society of Core Analysts Annual Symposium [Cite]View Abstract
Investigating the chemical reactivity of the Gipskeuper and Muschelkalk formations to wet CO2 injection: A case study towards the first CCS pilotRangel Jurado, N., Kong, X-Z., Kottsova, A., Games, F., Brehme, M., Saar, M.O.2023 Peer-ReviewedSwiss Geoscience Meeting[Cite]View Abstract
Modelling Potential Geological CO2 Storage Combined with CO2-Plume Geothermal CPG Energy Extraction in SwitzerlandK. Hau, F. Games, R. Lathion, M. Saar2022 URLDOI: 10.2523/iptc-22254-ms[Cite]View Abstract
Accelerated reactive transport simulations in heterogeneous porous media using Reaktoro and FiredrakeS. Kyas, D. Volpatto, M. Saar, A. Leal2022 Peer-ReviewedComputational Geosciences 26, 295-327 URLDOI: 10.1007/s10596-021-10126-2[Cite]View Abstract
Relating Darcy-Scale Chemical Reaction Order to Pore-Scale Spatial HeterogeneityP. Huang, B. Flemisch, C. Qin, M. Saar, A. Ebigbo2022 Peer-ReviewedTransport in Porous Media 144, 507-543 URLDOI: 10.1007/s11242-022-01817-0[Cite]View Abstract
The Role of High-Permeability Inclusion on Solute Transport in a 3D-Printed Fractured Porous Medium: An LIF–PIV Integrated StudyX. Kong, M. Ahkami, I. Naets, M. Saar2022 Peer-ReviewedTransport in Porous Media 146, 283-305 URLDOI: 10.1007/s11242-022-01827-y[Cite]View Abstract
On the applicability of connectivity metrics to rough fractures under normal stressH. Javanmard, M. Saar, D. Vogler2022 Peer-ReviewedAdvances in Water Resources 161 URLDOI: 10.1016/j.advwatres.2022.104122[Cite]View Abstract
Flexible CO2-plume geothermal (CPG-F): Using geologically stored CO2 to provide dispatchable power and energy storageM. Fleming, B. Adams, J. Ogland-Hand, J. Bielicki, T. Kuehn, M. Saar2022 Peer-ReviewedEnergy Conversion and Management 253 URLDOI: 10.1016/j.enconman.2021.115082[Cite]View Abstract
Numerical analysis and optimization of the performance of CO2-Plume Geothermal (CPG) production wells and implications for electric power generationJ. Ezekiel, B. Adams, M. Saar, A. Ebigbo2022 Peer-ReviewedGeothermics 98 URLDOI: 10.1016/j.geothermics.2021.102270[Cite]View Abstract
On the validation of mixed-mode I/II crack growth theories for anisotropic rocksM. Sakha, M. Nejati, A. Aminzadeh, S. Ghouli, M. Saar, T. Driesner2022 Peer-ReviewedInternational Journal of Solids and Structures 241 URLDOI: 10.1016/j.ijsolstr.2022.111484[Cite]View Abstract
Shear induced fluid flow path evolution in rough-wall fractures: A particle image velocimetry examinationI. Naets, M. Ahkami, P. Huang, M. Saar, X. Kong2022 Peer-ReviewedJournal of Hydrology 610 URLDOI: 10.1016/j.jhydrol.2022.127793[Cite]View Abstract
Techno-economic analysis of Advanced Geothermal Systems (AGS)A. Malek, B. Adams, E. Rossi, H. Schiegg, M. Saar2022 Peer-ReviewedRenewable Energy 186, 927-943 URLDOI: 10.1016/j.renene.2022.01.012[Cite]View Abstract
Using <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"> <mml:msub> <mml:mtext>CO</mml:mtext> <mml:mn>2</mml:mn> <...A. Van Brummen, B. Adams, R. Wu, J. Ogland-Hand, M. Saar2022 Peer-ReviewedRenewable and Sustainable Energy Transition 2 URLDOI: https://doi.org/10.1016/j.rset.2022.100026[Cite]View Abstract
Review: Induced Seismicity During Geoenergy Development—A Hydromechanical PerspectiveS. Ge, M. Saar2022 Peer-ReviewedJournal of Geophysical Research: Solid Earth 127 URLDOI: 10.1029/2021jb023141[Cite]View Abstract
The Importance of Modeling Carbon Dioxide Transportation and Geologic Storage in Energy System Planning ToolsJ. Ogland-Hand, S. Cohen, R. Kammer, K. Ellett, M. Saar, J. Bennett, R. Middleton2022 Peer-ReviewedFrontiers in Energy Research 10 URLDOI: 10.3389/fenrg.2022.855105[Cite]View Abstract
Multi-disciplinary characterizations of the BedrettoLab – a new underground geoscience research facilityX. Ma, M. Hertrich, F. Amann, K. Bröker, N. Gholizadeh Doonechaly, V. Gischig, R. Hochreutener, P. Kästli, H. Krietsch, M. Marti, B. Nägeli, M. Nejati, A. Obermann, K. Plenkers, A. Rinaldi, A. Shakas, L. Villiger, Q. Wenning, A. Zappone, F. Bethmann, R. Castilla, F. Seberto, P. Meier, T. Driesner, S. Loew, H. Maurer, M. Saar, S. Wiemer, D. Giardini2022 Peer-ReviewedSolid Earth 13, 301-322 URLDOI: 10.5194/se-13-301-2022[Cite]View Abstract
Optimizing CO2 circulation into geothermal fields for electrical power generation - Insight from wellbore-reservoir couplingHefny, M., Qin, C.-Z., Saar, M.O.2022Unknown Source[Cite]View Abstract
On the feasibility of producing geothermal energy at an intended CO2 sequestration field site in SwitzerlandHau, K.P., Games, F., Lathion, R., Brehme, M., Saar, M.O.2022European Geothermal Congress 2022 URL[Cite]View Abstract
Updated Geological and Structural Conceptual Model in High Temperature Geothermal FieldSuherlina, L., Saar, M.O., Kamah, Y., Brehme, M.2022European Geothermal Congress 2022[Cite]View Abstract
Clogging mechanisms in geothermal operations: theoretical examples and an applied studyKottsova, A., Bruhn, D., Saar, M.O., Brehme, M.2022European Geothermal Congress 2022[Cite]View Abstract
Comparative Analysis on the Techno-Economic Performance of Different Types of Deep Geothermal Systems for Heat Production Rangel-Jurado, N., Kücük, S., Brehme, M., Lathion, R., Games, F., Saar, M.2022European Geothermal Congress 2022[Cite]View Abstract
Comparative analysis on the techno-economic performance of different geothermal system types for heat generationRangel Jurado, N., Kucuk, S., Brehme, M., Lathion, R., Games, F., Saar, M.O.2022European Geothermal Congress[Cite]View Abstract
Minimum transmissivity and optimal well spacing and flow rate for high-temperature aquifer thermal energy storageD. Birdsell, B. Adams, M. Saar2021 Peer-ReviewedApplied Energy 289 URLDOI: 10.1016/j.apenergy.2021.116658[Cite]View Abstract
Quantification of mineral accessible surface area and flow-dependent fluid-mineral reactivity at the pore scaleJ. Ma, M. Ahkami, M. Saar, X. Kong2021 Peer-ReviewedChemical Geology 563 URLDOI: 10.1016/j.chemgeo.2020.120042[Cite]View Abstract
The value of CO2-Bulk energy storage with wind in transmission-constrained electric power systemsJ. Ogland-Hand, J. Bielicki, B. Adams, E. Nelson, T. Buscheck, M. Saar, R. Sioshansi2021 Peer-ReviewedEnergy Conversion and Management 228 URLDOI: 10.1016/j.enconman.2020.113548[Cite]View Abstract
Integrated magnetotelluric and petrological analysis of felsic magma reservoirs: Insights from Ethiopian rift volcanoesF. Samrock, A. Grayver, O. Bachmann, Ö. Karakas, M. Saar2021 Peer-ReviewedEarth and Planetary Science Letters 559 URLDOI: 10.1016/j.epsl.2021.116765[Cite]View Abstract
Benchmark study of simulators for thermo-hydraulic modelling of low enthalpy geothermal processesJ. Mindel, P. Alt-Epping, A. Landes, S. Beernink, D. Birdsell, M. Bloemendal, V. Hamm, S. Lopez, C. Maragna, C. Nielsen, S. Olivella, M. Perreaux, M. Saaltink, M. Saar, D. Van den Heuvel, R. Vidal, T. Driesner2021 Peer-ReviewedGeothermics 96 URLDOI: 10.1016/j.geothermics.2021.102130[Cite]View Abstract
Flow-through Drying during CO <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si3.svg"> <mml:msub> <mml:mrow/> <mml:mn>2</mml:mn> ...M. Lima, H. Javanmard, D. Vogler, M. Saar, X. Kong2021 Peer-ReviewedInternational Journal of Greenhouse Gas Control 109 URLDOI: https://doi.org/10.1016/j.ijggc.2021.103378[Cite]View Abstract
Heat depletion in sedimentary basins and its effect on the design and electric power output of CO2 Plume Geothermal (CPG) systemsB. Adams, D. Vogler, T. Kuehn, J. Bielicki, N. Garapati, M. Saar2021 Peer-ReviewedRenewable Energy 172, 1393-1403 URLDOI: 10.1016/j.renene.2020.11.145[Cite]View Abstract
No‐Flow Fraction (NFF) Permeability Model for Rough Fractures Under Normal StressH. Javanmard, A. Ebigbo, S. Walsh, M. Saar, D. Vogler2021 Peer-ReviewedWater Resources Research 57 URLDOI: 10.1029/2020wr029080[Cite]View Abstract
Simulating Plasma Formation in Pores under Short Electric Pulses for Plasma Pulse Geo Drilling (PPGD)M. Ezzat, D. Vogler, M. Saar, B. Adams2021 Peer-ReviewedEnergies 14 URLDOI: 10.3390/en14164717[Cite]View Abstract
Sensitivity of Reservoir and Operational Parameters on the Energy Extraction Performance of Combined CO2-EGR–CPG SystemsJ. Ezekiel, D. Kumbhat, A. Ebigbo, B. Adams, M. Saar2021 Peer-ReviewedEnergies 14 URLDOI: 10.3390/en14196122[Cite]View Abstract
Numerical Modeling of the Effects of Pore Characteristics on the Electric Breakdown of Rock for Plasma Pulse Geo DrillingM. Ezzat, B. Adams, M. Saar, D. Vogler2021 Peer-ReviewedEnergies 15 URLDOI: 10.3390/en15010250[Cite]View Abstract
Multi-disciplinary characterizations of the Bedretto Lab – a unique underground geoscience research facilityX. Ma, M. Hertrich, F. Amann, K. Bröker, N. Gholizadeh Doonechaly, V. Gischig, R. Hochreutener, P. Kästli, H. Krietsch, M. Marti, B. Nägeli, M. Nejati, A. Obermann, K. Plenkers, A. Rinaldi, A. Shakas, L. Villiger, Q. Wenning, A. Zappone, F. Bethmann, R. Castilla, F. Seberto, P. Meier, T. Driesner, S. Löw, H. Maurer, M. Saar, S. Wiemer, D. Giardini2021 Peer-ReviewedCopernicus GmbH URLDOI: 10.5194/se-2021-109[Cite]View Abstract
Feasibility of CO2-Plume Geothermal (CPG) power generation in a hydrocarbon-depleted Nubian Sandstone reservoir in EgyptHefny, M., Ebigbo, A., Adams, B., Hammed, M., Hassan, Z., Saar, M. O.2021Renewable Energy[Cite]View Abstract
Analytical Approaches for Porous Media Geothermal Power CalculationsBirdsell, D.T., Adams, B.M., Ogland-Hand, J.D., Bielicki, J.M., Fleming, M.R., Saar, M.O.2021Geothermics[Cite]View Abstract
Quantification of fracture-matrix fluid exchange in fractured porous media using PIV measurementsAhkami, M., Penn, A., Naets, I., Hennel, F., Müller, C. R., Pruessmann, K. P., Saar, M. O., Kong, X.-Z.2021Transport in Porous Media[Cite]View Abstract
Deformation monitoring at the geothermal exploration site GEo-01, Satigny, Geneva, CH. First constraints on reservoir properties. Birdsell, D.T., Houlie, N., Guglielmetti, L., Saar, M.O.2021Unknown Source[Cite]View Abstract
EASYGO-Efficiency and Safety in Geothermal Operations-A new Innovative Training NetworBrehme, M, Saar, M O, Slob, E, Bombarda, P, Maurer, H, Wellmann, F, Vardon, P, Bruhn, D, Team, E2021EGU General Assembly Conference Abstracts[Cite]View Abstract
A lattice-Boltzmann study of permeability-porosity relationships and mineral precipitation patterns in fractured porous mediaM. Ahkami, A. Parmigiani, P. Di Palma, M. Saar, X. Kong2020 Peer-ReviewedComputational Geosciences 24, 1865-1882 URLDOI: 10.1007/s10596-019-09926-4[Cite]View Abstract
Modelling of hydro-mechanical processes in heterogeneous fracture intersections using a fictitious domain method with variational transfer operatorsC. von Planta, D. Vogler, X. Chen, M. Nestola, M. Saar, R. Krause2020 Peer-ReviewedComputational Geosciences 24, 1799-1814 URLDOI: 10.1007/s10596-020-09936-7[Cite]View Abstract
Accelerating Reactive Transport Modeling: On-Demand Machine Learning Algorithm for Chemical Equilibrium CalculationsA. Leal, S. Kyas, D. Kulik, M. Saar2020 Peer-ReviewedTransport in Porous Media 133, 161-204 URLDOI: 10.1007/s11242-020-01412-1[Cite]View Abstract
Simulation of rock failure modes in thermal spallation drillingD. Vogler, S. Walsh, P. von Rohr, M. Saar2020 Peer-ReviewedActa Geotechnica 15, 2327-2340 URLDOI: 10.1007/s11440-020-00927-7[Cite]View Abstract
Combining natural gas recovery and CO2-based geothermal energy extraction for electric power generationJ. Ezekiel, A. Ebigbo, B. Adams, M. Saar2020 Peer-ReviewedApplied Energy 269 URLDOI: 10.1016/j.apenergy.2020.115012[Cite]View Abstract
A combined thermo-mechanical drilling technology for deep geothermal and hard rock reservoirsE. Rossi, S. Jamali, V. Wittig, M. Saar, P. Rudolf von Rohr2020 Peer-ReviewedGeothermics 85 URLDOI: 10.1016/j.geothermics.2019.101771[Cite]View Abstract
Characterization of the effects of hydraulic stimulation with tracer-based temporal moment analysis and tomographic inversionA. Kittilä, M. Jalali, M. Somogyvári, K. Evans, M. Saar, X. Kong2020 Peer-ReviewedGeothermics 86 URLDOI: 10.1016/j.geothermics.2020.101820[Cite]View Abstract
Increased Power Generation due to Exothermic Water Exsolution in CO2 Plume Geothermal (CPG) Power PlantsM. Fleming, B. Adams, T. Kuehn, J. Bielicki, M. Saar2020 Peer-ReviewedGeothermics 88 URLDOI: 10.1016/j.geothermics.2020.101865[Cite]View Abstract
Hydraulic stimulation and fluid circulation experiments in underground laboratories: Stepping up the scale towards engineered geothermal systemsV. Gischig, D. Giardini, F. Amann, M. Hertrich, H. Krietsch, S. Loew, H. Maurer, L. Villiger, S. Wiemer, F. Bethmann, B. Brixel, J. Doetsch, N. Doonechaly, T. Driesner, N. Dutler, K. Evans, M. Jalali, D. Jordan, A. Kittilä, X. Ma, P. Meier, M. Nejati, A. Obermann, K. Plenkers, M. Saar, A. Shakas, B. Valley2020 Peer-ReviewedGeomechanics for Energy and the Environment 24 URLDOI: 10.1016/j.gete.2019.100175[Cite]View Abstract
Synchrotron-based pore-network modeling of two-phase flow in Nubian Sandstone and implications for capillary trapping of carbon dioxideM. Hefny, C. Qin, M. Saar, A. Ebigbo2020 Peer-ReviewedInternational Journal of Greenhouse Gas Control 103 URLDOI: 10.1016/j.ijggc.2020.103164[Cite]View Abstract
Contact between rough rock surfaces using a dual mortar methodC. von Planta, D. Vogler, P. Zulian, M. Saar, R. Krause2020 Peer-ReviewedInternational Journal of Rock Mechanics and Mining Sciences 133 URLDOI: 10.1016/j.ijrmms.2020.104414[Cite]View Abstract
Combining brine or CO2 geothermal preheating with low-temperature waste heat: A higher-efficiency hybrid geothermal power systemN. Garapati, B. Adams, M. Fleming, T. Kuehn, M. Saar2020 Peer-ReviewedJournal of CO2 Utilization 42 URLDOI: 10.1016/j.jcou.2020.101323[Cite]View Abstract
A numerical investigation into key factors controlling hard rock excavation via electropulse stimulationD. Vogler, S. Walsh, M. Saar2020 Peer-ReviewedJournal of Rock Mechanics and Geotechnical Engineering 12, 793-801 URLDOI: 10.1016/j.jrmge.2020.02.002[Cite]View Abstract
Field test of a Combined Thermo-Mechanical Drilling technology. Mode II: Flame-assisted rotary drillingE. Rossi, S. Jamali, D. Schwarz, M. Saar, P. Rudolf von Rohr2020 Peer-ReviewedJournal of Petroleum Science and Engineering 190 URLDOI: 10.1016/j.petrol.2019.106880[Cite]View Abstract
Field test of a Combined Thermo-Mechanical Drilling technology. Mode I: Thermal spallation drillingE. Rossi, S. Jamali, M. Saar, P. Rudolf von Rohr2020 Peer-ReviewedJournal of Petroleum Science and Engineering 190 URLDOI: 10.1016/j.petrol.2020.107005[Cite]View Abstract
Coulomb criterion - bounding crustal stress limit and intact rock failure: PerspectivesX. Ma, M. Saar, L. Fan2020 Peer-ReviewedPowder Technology 374, 106-110 URLDOI: 10.1016/j.powtec.2020.07.044[Cite]View Abstract
On the directional dependency of Mode I fracture toughness in anisotropic rocksM. Nejati, A. Aminzadeh, T. Driesner, M. Saar2020 Peer-ReviewedTheoretical and Applied Fracture Mechanics 107 URLDOI: 10.1016/j.tafmec.2020.102494[Cite]View Abstract
The Effect of Mineral Dissolution on the Effective Stress Law for Permeability in a Tight SandstoneJ. Ma, L. Querci, B. Hattendorf, M. Saar, X. Kong2020 Peer-ReviewedGeophysical Research Letters 47 URLDOI: 10.1029/2020gl088346[Cite]View Abstract
Permeability Impairment and Salt Precipitation Patterns During CO<sub>2</sub> Injection Into Single Natural Brine‐Filled FracturesM. Grimm Lima, P. Schädle, C. Green, D. Vogler, M. Saar, X. Kong2020 Peer-ReviewedWater Resources Research 56 URLDOI: 10.1029/2020wr027213[Cite]View Abstract
The influence of thermal treatment on rock–bit interaction: a study of a combined thermo–mechanical drilling (CTMD) conceptE. Rossi, M. Saar, P. Rudolf von Rohr2020 Peer-ReviewedGeothermal Energy 8 URLDOI: 10.1186/s40517-020-00171-y[Cite]View Abstract
Solute tracer test quantification of the effects of hot water injection into hydraulically stimulated crystalline rockA. Kittilä, M. Jalali, M. Saar, X. Kong2020 Peer-ReviewedGeothermal Energy 8 URLDOI: 10.1186/s40517-020-00172-x[Cite]View Abstract
Contributions of visible and invisible pores to reactive transport in dolomiteB. Tutolo, A. Luhmann, X. Kong, B. Bagley, D. Alba-Venero, N. Mitchell, M. Saar, W. Seyfried, Jr.2020 Peer-ReviewedGeochemical Perspectives Letters, 42-46 URLDOI: 10.7185/geochemlet.2022[Cite]View Abstract
3-D magnetotelluric survey at northern Swiss heat flow anomalyShah, N., Samrock, F., Saar, M.O.2020Unknown Source[Cite]View Abstract
Reservoir characterization of the Nubian Sandstone for geothermal applications: petrophysical evaluation in the central Gulf of Suez (Egypt)Hefny, M., Hammed, M., Ebigbo, A., Saar, M. O.2020World Geothermal Congress [Cite]View Abstract
Characterization of Subsurface Heat-Transport Processes in the Canton of Aargau Using an Integrative WorkflowNiederau, J., Ebigbo, A., Saar, M. O.2020 Peer-ReviewedProceedings World Geothermal Congress 2020, Reykjavik, Iceland, April 26 - May 2, 2020[Cite]View Abstract
HEATSTORE SWITZERLAND: New Opportunities of Geothermal District Heating Network Sustainable Growth by High Temperature Aquifer Thermal Energy Storage DevelopmentGuglielmetti, L., Alt-Epping, P., Birdsell, D., de Oliveira, F., Diamond, L., Driesner, T., Eruteya, O., Hollmuller, P., et al., Saar, M.O.2020World Geothermal Congress[Cite]View Abstract
Combining direct air capture and geothermal heat and electricity generation for net-negative carbon dioxide emissionsAdams, B.M., Sutter, D., Mazzotti, M., Saar, M.O.2020World Geothermal Congress[Cite]View Abstract
Using sequestered CO2 as geothermal working fluid to generate electricity and store energyFleming, M.R., Adams, B.M., Saar, M.O.2020World Geothermal Congress[Cite]View Abstract
Geospatial estimation of the electric power potential in sedimentary basin geothermal resources using geologically stored carbon dioxideMaldonado, S.B., Bielicki, J.B., Miranda, M.W., Howard, C., Adams, B.M., Buscheck, T.A., Saar, M.O.2020World Geothermal Congress[Cite]View Abstract
A Numerical Model for Formation Dry-out During CO2 Injection in Fractured Reservoirs Using the MOOSE Framework: Implications for CO2-based Geothermal Energy ExtractionLima, M., Schädle, P., Vogler, D., Saar, M., Kong, X.-Z.2020 Peer-ReviewedProceedings of the World Geothermal Congress 2020, Reykjavík, Iceland[Cite]View Abstract
Numerical investigations of thermal attenuation and lag time in rough fractures: comparison of joint solute and heat tracer testsSchädle, P., Saar, M. O., Ebigbo, A.2020Unknown Source[Cite]View Abstract
Correlation between Fracture Network Properties and Stress Variations near Shear ZonesZhang, S., Saar, M.O., Ma, X.2020 Peer-ReviewedSwiss Geoscience Meeting[Cite]View Abstract
Thermo-hydrologic modelling benchmark of simulators for application in high-temperature aquifer thermal energy storageMindel, J., et al., Birdsell, D.T., Saar, M.O.2020Geothermics[Cite]View Abstract
On the Suitability of the Aquistore CCS-site for a CO2-Circulation TestHau, K.P., Rangriz Shokri, A., Nickel, E., Chalaturnyk, R.J., Saar, M.O.2020World Geothermal Congress 2020+1[Cite]View Abstract
Characterization of Subsurface Heat-Transport Processes in the Canton of Aargau Using an Integrative WorkflowNiederau, J., Ebigbo, A., Saar, M.2020 Peer-ReviewedProceedings World Geothermal Congress 2020[Cite]View Abstract
Laboratory and Field Investigation of a Combined Thermo-Mechanical Technology to Enhance Deep Geothermal DrillingE. Rossi, S. Jamali, M. Saar, P. Rudolf von Rohr2019 Peer-Reviewed81st EAGE Conference and Exhibition 2019 URLDOI: 10.3997/2214-4609.201901604[Cite]View Abstract
Simulation of hydro-mechanically coupled processes in rough rock fractures using an immersed boundary method and variational transfer operatorsC. von Planta, D. Vogler, X. Chen, M. Nestola, M. Saar, R. Krause2019 Peer-ReviewedComputational Geosciences 23, 1125-1140 URLDOI: 10.1007/s10596-019-09873-0[Cite]View Abstract
3D non-conforming mesh model for flow in fractured porous media using Lagrange multipliersP. Schädle, P. Zulian, D. Vogler, S. Bhopalam, M. Nestola, A. Ebigbo, R. Krause, M. Saar2019 Peer-ReviewedComputers & Geosciences 132, 42-55 URLDOI: 10.1016/j.cageo.2019.06.014[Cite]View Abstract
The value of bulk energy storage for reducing CO2 emissions and water requirements from regional electricity systemsJ. Ogland-Hand, J. Bielicki, Y. Wang, B. Adams, T. Buscheck, M. Saar2019 Peer-ReviewedEnergy Conversion and Management 181, 674-685 URLDOI: 10.1016/j.enconman.2018.12.019[Cite]View Abstract
On the direct measurement of shear moduli in transversely isotropic rocks using the uniaxial compression testM. Dambly, M. Nejati, D. Vogler, M. Saar2019 Peer-ReviewedInternational Journal of Rock Mechanics and Mining Sciences 113, 220-240 URLDOI: 10.1016/j.ijrmms.2018.10.025[Cite]View Abstract
A methodology to determine the elastic properties of anisotropic rocks from a single uniaxial compression testM. Nejati, M. Dambly, M. Saar2019 Peer-ReviewedJournal of Rock Mechanics and Geotechnical Engineering 11, 1166-1183 URLDOI: 10.1016/j.jrmge.2019.04.004[Cite]View Abstract
Toward a Spatiotemporal Understanding of Dolomite Dissolution in Sandstone by CO<sub>2</sub>-Enriched Brine CirculationJ. Ma, L. Querci, B. Hattendorf, M. Saar, X. Kong2019 Peer-ReviewedEnvironmental Science & Technology 53, 12458-12466 URLDOI: 10.1021/acs.est.9b04441[Cite]View Abstract
Field Comparison of DNA‐Labeled Nanoparticle and Solute Tracer Transport in a Fractured Crystalline RockA. Kittilä, M. Jalali, K. Evans, M. Willmann, M. Saar, X. Kong2019 Peer-ReviewedWater Resources Research 55, 6577-6595 URLDOI: 10.1029/2019wr025021[Cite]View Abstract
Thermally driven fracture aperture variation in naturally fractured granitesM. Lima, D. Vogler, L. Querci, C. Madonna, B. Hattendorf, M. Saar, X. Kong2019 Peer-ReviewedGeothermal Energy 7 URLDOI: 10.1186/s40517-019-0140-9[Cite]View Abstract
Using TNT-NN to unlock the fast full spatial inversion of large magnetic microscopy data setsJ. Myre, I. Lascu, E. Lima, J. Feinberg, M. Saar, B. Weiss2019 Peer-ReviewedEarth, Planets and Space 71 URLDOI: 10.1186/s40623-019-0988-8[Cite]View Abstract
A methodology to determine the elastic properties of anisotropic rocks from a single uniaxial compression testNejati, M., Damply, M.L.T., Saar, M.O.2019 Peer-ReviewedJournal of Rock Mechanics and Geotechnical Engineering JRMGE [Cite]View Abstract
CO2 Interfacial Tension and Wettability: A pH and Ionic Strength InterpretationKong, X.-Z., Ahkami, M., Saar, M.O.2019Energy & Fuels[Cite]View Abstract
Impact of Effective Normal Stress on Capillary Pressure in a Single Natural FractureLima, M.M., Schädle, P., Vogler, D., Saar, M.O., Kong, X.-Z.2019European Geothermal Congress 2019[Cite]View Abstract
Estimation of Effective Surface Area: A Study on Dolomite Cement Dissolution in SandstonesMa, J., Saar, M.O., Kong, X.-Z.2019 Peer-ReviewedProceedings World Geothermal Congress 2020[Cite]View Abstract
A generalizable cost model for geothermal electricity generationAdams, B.M., Bielicki, J.M., Ogland-Hand, J., Saar, M.O.2019Applied Energy[Cite]View Abstract
TNT: A Solver for Large Dense Least-Squares Problems that Takes Conjugate Gradient from Bad in Theory, to Good in PracticeJ. Myre, E. Frahm, D. Lilja, M. Saar2018 Peer-Reviewed2018 IEEE International Parallel and Distributed Processing Symposium Workshops (IPDPSW) URLDOI: 10.1109/ipdpsw.2018.00153[Cite]View Abstract
The Effects of High Heating Rate and High Temperature on the Rock Strength: Feasibility Study of a Thermally Assisted Drilling MethodE. Rossi, M. Kant, C. Madonna, M. Saar, P. Rudolf von Rohr2018 Peer-ReviewedRock Mechanics and Rock Engineering 51, 2957-2964 URLDOI: 10.1007/s00603-018-1507-0[Cite]View Abstract
High-Resolution Temporo-Ensemble PIV to Resolve Pore-Scale Flow in 3D-Printed Fractured Porous MediaM. Ahkami, T. Roesgen, M. Saar, X. Kong2018 Peer-ReviewedTransport in Porous Media 129, 467-483 URLDOI: 10.1007/s11242-018-1174-3[Cite]View Abstract
Estimating fluid flow rates through fracture networks using combinatorial optimizationA. Hobé, D. Vogler, M. Seybold, A. Ebigbo, R. Settgast, M. Saar2018 Peer-ReviewedAdvances in Water Resources 122, 85-97 URLDOI: 10.1016/j.advwatres.2018.10.002[Cite]View Abstract
Demonstration of thermal borehole enlargement to facilitate controlled reservoir engineering for deep geothermal, oil or gas systemsM. Kant, E. Rossi, J. Duss, F. Amann, M. Saar, P. Rudolf von Rohr2018 Peer-ReviewedApplied Energy 212, 1501-1509 URLDOI: 10.1016/j.apenergy.2018.01.009[Cite]View Abstract
Silica-Encapsulated DNA-Based Tracers for Aquifer CharacterizationG. Mikutis, C. Deuber, L. Schmid, A. Kittilä, N. Lobsiger, M. Puddu, D. Asgeirsson, R. Grass, M. Saar, W. Stark2018 Peer-ReviewedEnvironmental Science & Technology 52, 12142-12152 URLDOI: 10.1021/acs.est.8b03285[Cite]View Abstract
Tomographic Reservoir Imaging with DNA-Labeled Silica Nanotracers: The First Field ValidationX. Kong, C. Deuber, A. Kittilä, M. Somogyvári, G. Mikutis, P. Bayer, W. Stark, M. Saar2018 Peer-ReviewedEnvironmental Science & Technology 52, 13681-13689 URLDOI: 10.1021/acs.est.8b04367[Cite]View Abstract
Magnetotelluric Image of Transcrustal Magmatic System Beneath the Tulu Moye Geothermal Prospect in the Ethiopian RiftF. Samrock, A. Grayver, H. Eysteinsson, M. Saar2018 Peer-ReviewedGeophysical Research Letters 45 URLDOI: 10.1029/2018gl080333[Cite]View Abstract
The seismo-hydromechanical behavior during deep geothermal reservoir stimulations: open questions tackled in a decameter-scale in situ stimulation experimentF. Amann, V. Gischig, K. Evans, J. Doetsch, R. Jalali, B. Valley, H. Krietsch, N. Dutler, L. Villiger, B. Brixel, M. Klepikova, A. Kittilä, C. Madonna, S. Wiemer, M. Saar, S. Loew, T. Driesner, H. Maurer, D. Giardini2018 Peer-ReviewedSolid Earth 9, 115-137 URLDOI: 10.5194/se-9-115-2018[Cite]View Abstract
Experiments on Rock-Bit Interaction During a Combined Thermo-Mechanical Drilling MethodRossi, E., Kant, M.A., Borkeloh, O., Saar, M.O., Rudolf von Rohr, Ph.201843rd Workshop on Geothermal Reservoir Engineering[Cite]View Abstract
An analysis of the demonstration of a carbon dioxide based thermosiphon at the SECARB Cranfield site.Adams, B.M., Fleming, M.R., Garapati, N., Saar, M.O., Kuehn, T.H.2018Geothermics[Cite]View Abstract
Fluid-Structure Interaction with a parallel transfer operators to model hydro-mechanical processes in heterogeneous fracturesvon Planta, C., Vogler, D., Chen, X., Nestola, M., Zulian, P., Saar, M.O., Krause, R.2018CouFrac 2019[Cite]View Abstract
Fluid-structure interaction with a parallel transfer operators to model hydro-mechanical processes in heterogeneous fracturesvon Planta, C., Vogler, D., Chen, X., Nestola, M.G.C., Saar, M.O., Krause, R.2018International Conference on Coupled Processes in Fractured Geological Media (CouFrac 2018)[Cite]View Abstract
A Hybrid Geothermal Energy Conversion Technology - A Potential Solution for Production of Electricity from Shallow Geothermal ResourcesN. Garapati, B. Adams, J. Bielicki, P. Schaedle, J. Randolph, T. Kuehn, M. Saar2017 Peer-Reviewed URLDOI: 10.1016/j.egypro.2017.03.1852[Cite]View Abstract
Permeability, porosity, and mineral surface area changes in basalt cores induced by reactive transport of <scp>CO</scp><sub>2</sub>‐rich brineA. Luhmann, B. Tutolo, B. Bagley, D. Mildner, W. Seyfried, M. Saar2017 Peer-ReviewedWater Resources Research 53, 1908-1927 URLDOI: 10.1002/2016wr019216[Cite]View Abstract
Whole rock basalt alteration from CO2-rich brine during flow-through experiments at 150 °C and 150 barA. Luhmann, B. Tutolo, C. Tan, B. Moskowitz, M. Saar, W. Seyfried2017 Peer-ReviewedChemical Geology 453, 92-110 URLDOI: 10.1016/j.chemgeo.2017.02.002[Cite]View Abstract
Calculating thermophysical fluid properties during geothermal energy production with NESS and ReaktoroS. Walsh, N. Garapati, A. Leal, M. Saar2017 Peer-ReviewedGeothermics 70, 146-154 URLDOI: 10.1016/j.geothermics.2017.06.008[Cite]View Abstract
TNT-NN: A Fast Active Set Method for Solving Large Non-Negative Least Squares ProblemsJ. Myre, E. Frahm, D. Lilja, M. Saar2017 Peer-ReviewedProcedia Computer Science 108, 755-764 URLDOI: 10.1016/j.procs.2017.05.194[Cite]View Abstract
An overview of computational methods for chemical equilibrium and kinetic calculations for geochemical and reactive transport modelingA. Leal, D. Kulik, W. Smith, M. Saar2017 Peer-ReviewedPure and Applied Chemistry 89, 597-643 URLDOI: 10.1515/pac-2016-1107[Cite]View Abstract
Crosshole electromagnetic method development for geothermal systems and other reservoirsSamrock, F., Grayver, A., Saar, M.O.2017Unknown Source[Cite]View Abstract
Economies of Scale for Producing Geothermal Energy Using Sequestered Carbon DioxideBiellicki, J.M., Taff, S., Choi, H., Jamiyuranson, B., Saar, M.O., Kuehn, T.H., Ogland-Hand, J.2017Unknown Source[Cite]View Abstract
Reservoir modeling of a CO2 Plume Geothermal SystemAllstadt, R., Garapati, N., Saar, M.O.2017Geothermal Energy[Cite]View Abstract
The effects of flame-heating on rock strength: Towards a new drilling technologyRossi, E., Kant, M., Amann, F., Saar, M.O., Rudolf von Rohr, P.2017 Peer-ReviewedProceedings ARMA 2017[Cite]View Abstract
Modeling the Hydraulic Fracture Stimulation performed for Reservoir Permeability Enhancement at the Grimsel Test Site, SwitzerlandVogler, D., Settgast, R.R., Sherman, C.S., Gischig, V.S., Jalali, R., Doetsch, J.A., Valley, B., Evans, K.F., Amann, F., Saar, M.O.2017 Peer-ReviewedProceedings of the 42nd Workshop on Geothermal Reservoir Engineering Stanford University URL[Cite]View Abstract
Cost-Competitive Geothermal Electricity from Geologic CO2 StorageBielicki, J.M., Adams, B.M., Choi, H., Jamiyansuren, B., Taff, S.J., Buscheck, T.A., Ogland-Hand, J.D., Randolph, J.B., Saar, M.O.2017Energy Conversion and Management[Cite]View Abstract
Computational methods for reactive transport modeling: An extended law of mass-action, xLMA, method for multiphase equilibrium calculationsA. Leal, D. Kulik, G. Kosakowski, M. Saar2016 Peer-ReviewedAdvances in Water Resources 96, 405-422 URLDOI: 10.1016/j.advwatres.2016.08.008[Cite]View Abstract
Enabling Gibbs energy minimization algorithms to use equilibrium constants of reactions in multiphase equilibrium calculationsA. Leal, D. Kulik, M. Saar2016 Peer-ReviewedChemical Geology 437, 170-181 URLDOI: 10.1016/j.chemgeo.2016.05.029[Cite]View Abstract
Nanoscale constraints on porosity generation and fluid flow during serpentinizationB. Tutolo, D. Mildner, C. Gagnon, M. Saar, W. Seyfried2016 Peer-ReviewedGeology 44, 103-106 URLDOI: 10.1130/g37349.1[Cite]View Abstract
Multifluid geo-energy systems: Using geologic CO<sub>2</sub>storage for geothermal energy production and grid-scale energy storage in sedimentary basinsT. Buscheck, J. Bielicki, T. Edmunds, Y. Hao, Y. Sun, J. Randolph, M. Saar2016 Peer-ReviewedGeosphere 12, 678-696 URLDOI: 10.1130/ges01207.1[Cite]View Abstract
Simulating Reinjection of Produced Fluids Into the ReservoirGarapati, N., Randolph, J., Finsterle, S., Saar, M.O.2016 Peer-ReviewedProceedings of 41st Workshop on Geothermal Reservoir Engineering URL[Cite]View Abstract
Semi-analytic Green’s Function solution for conductive heat transfer in a half-space due to a moving convective boundary condition with adaptable shapesRossi, E., Kant, M., Saar, M.O., Rudolf von Rohr, P.2016 Peer-ReviewedInternational Journal of Heat and Mass Transfer[Cite]View Abstract
TNT: A Preconditioned Method for Applying Conjugate Gradient to Dense Least-Squares ProblemsMyre, J.M., Frahm, E., Lilja, D.J., Saar, M.O.2016Unknown Source[Cite]View Abstract
Implications of hydrothermal flow-through experiments on deep geothermal energy utilizationKong, X.-Z., Leal, A.M.M., Saar, M.O.2016European Geothermal Congress 2016[Cite]View Abstract
A comparison of electric power output of CO2 Plume Geothermal (CPG) and brine geothermal systems for varying reservoir conditionsB. Adams, T. Kuehn, J. Bielicki, J. Randolph, M. Saar2015 Peer-ReviewedApplied Energy 140, 365-377 URLDOI: 10.1016/j.apenergy.2014.11.043[Cite]View Abstract
Implications of the redissociation phenomenon for mineral-buffered fluids and aqueous species transport at elevated temperatures and pressuresB. Tutolo, A. Schaen, M. Saar, W. Seyfried2015 Peer-ReviewedApplied Geochemistry 55, 119-127 URLDOI: 10.1016/j.apgeochem.2014.11.002[Cite]View Abstract
CO2 sequestration in feldspar-rich sandstone: Coupled evolution of fluid chemistry, mineral reaction rates, and hydrogeochemical propertiesB. Tutolo, A. Luhmann, X. Kong, M. Saar, W. Seyfried2015 Peer-ReviewedGeochimica et Cosmochimica Acta 160, 132-154 URLDOI: 10.1016/j.gca.2015.04.002[Cite]View Abstract
Brine displacement by CO2, energy extraction rates, and lifespan of a CO2-limited CO2-Plume Geothermal (CPG) system with a horizontal production wellN. Garapati, J. Randolph, M. Saar2015 Peer-ReviewedGeothermics 55, 182-194 URLDOI: 10.1016/j.geothermics.2015.02.005[Cite]View Abstract
High performance reactive transport simulations examining the effects of thermal, hydraulic, and chemical (THC) gradients on fluid injectivity at carbonate CCUS reservoir scalesB. Tutolo, X. Kong, W. Seyfried, M. Saar2015 Peer-ReviewedInternational Journal of Greenhouse Gas Control 39, 285-301 URLDOI: 10.1016/j.ijggc.2015.05.026[Cite]View Abstract
Thermal damping and retardation in karst conduitsA. Luhmann, M. Covington, J. Myre, M. Perne, S. Jones, E. Alexander Jr., M. Saar2015 Peer-ReviewedHydrology and Earth System Sciences 19, 137-157 URLDOI: 10.5194/hess-19-137-2015[Cite]View Abstract
Design of CO2-Plume Geothermal (CPG) subsurface system for various geologic parametersGarapati, N., Randolph, J.B., Valencia Jr., J.L., Saar, M.O.2015 Peer-ReviewedProceedings of the Fifth International Conference on Coupled Thermo-Hydro-Mechanical-Chemical (THMC) Processes in Geosystems: Petroleum and Geothermal Reservoir Geomechanics and Energy Resource Extraction URL[Cite]View Abstract
Superheating Low-Temperature Geothermal Resources to Boost Electricity ProductionGarapati, N., Randolph, J.B., Saar, M.O.2015 Peer-ReviewedProceedings of the 40th Workshop on Geothermal Reservoir Engineering 2015 URL[Cite]View Abstract
Numerical Study of Multi-Fluid and Multi-Level Geothermal System PerformanceSaar, M.O., Buscheck, Th., Jenny, P., Garapati, N., Randolph, J.B., Karvounis, D., Chen, M., Sun, Y., Bielicki, J.M.2015 Peer-ReviewedProceedings World Geothermal Congress 2015 URL[Cite]View Abstract
Multi-Fluid Sedimentary Geothermal Energy Systems for Dispatchable Renewable ElectricityBuscheck, T.A., Bielicki, J.M., Chen, M., Sun, Y., Hao, Y., Edmunds, T.A., Randolph, J.B., Saar, M.O.2015 Peer-ReviewedProceedings to the World Geothermal Congress URL[Cite]View Abstract
