Thomas Köhl
YOU?
Author Swipe
View article: Designing chemical interactions of a geothermal battery in the Malm reservoir of Munich
Designing chemical interactions of a geothermal battery in the Malm reservoir of Munich Open
The Malm reservoir in the South German Molasse Basin, characterized by its highly heterogeneous karstified carbonate structure, offers significant potential for geothermal energy production and seasonal heat storage. This study investigate…
View article: Investigating the impact of wellbore lateral heat transfer on the performance of high-temperature aquifer thermal energy storage system by the coupling of wellbore and reservoir simulators
Investigating the impact of wellbore lateral heat transfer on the performance of high-temperature aquifer thermal energy storage system by the coupling of wellbore and reservoir simulators Open
View article: Design of silica nanoparticle tracers with optimized dispersion stability, sorption and deposition properties based on (X)DLVO and filtration theory
Design of silica nanoparticle tracers with optimized dispersion stability, sorption and deposition properties based on (X)DLVO and filtration theory Open
View article: Stress state at faults: the influence of rock stiffness contrast, stress orientation, and ratio
Stress state at faults: the influence of rock stiffness contrast, stress orientation, and ratio Open
The contemporary crustal stress state is primarily driven by gravitational volume forces and plate tectonics. However, there are various smaller-scale sources such as geological structures and stiffness contrast that perturb stresses and d…
View article: Temperature stability and enhanced transport properties by surface modifications of silica nanoparticle tracers for geo-reservoir exploration
Temperature stability and enhanced transport properties by surface modifications of silica nanoparticle tracers for geo-reservoir exploration Open
View article: Reporting nanoparticle tracers: Validation of performance in flow-through experiments simulating reservoir conditions
Reporting nanoparticle tracers: Validation of performance in flow-through experiments simulating reservoir conditions Open
Characterization and monitoring of reservoir properties and conditions are key problems in the exploitation of subsurface aquifers and reservoirs, with tracer tests being an important tool that provides valuable insights into groundwater d…
View article: Comment on egusphere-2024-1109
Comment on egusphere-2024-1109 Open
Abstract. Even though the crustal stress state is primarily driven by gravitational volume forces and plate tectonics, interpretations of borehole breakout observations show occasionally abrupt rotations of horizontal stre…
View article: Comment on egusphere-2024-1109
Comment on egusphere-2024-1109 Open
Abstract. Even though the crustal stress state is primarily driven by gravitational volume forces and plate tectonics, interpretations of borehole breakout observations show occasionally abrupt rotations of horizontal stre…
View article: Developing meshing workflows in Gmsh v4.11 for the geologic uncertainty assessment of high-temperature aquifer thermal energy storage
Developing meshing workflows in Gmsh v4.11 for the geologic uncertainty assessment of high-temperature aquifer thermal energy storage Open
Evaluating uncertainties of geological features on fluid temperature and pressure changes in a reservoir plays a crucial role in the safe and sustainable operation of high-temperature aquifer thermal energy storage (HT-ATES). This study in…
View article: The effect of stiffness contrasts at faults on stress orientation
The effect of stiffness contrasts at faults on stress orientation Open
Even though the crustal stress state is primarily driven by gravitational volume forces and plate tectonics, interpretations of borehole breakout observations show occasionally abrupt rotations of horizontal stress orientation of up to 90°…
View article: Machine learning for robust structural uncertainty quantification in fractured reservoirs
Machine learning for robust structural uncertainty quantification in fractured reservoirs Open
Including uncertainty is essential for accurate decision-making in underground applications. We propose a novel approach to consider structural uncertainty in two enhanced geothermal systems (EGSs) using machine learning (ML) models. The r…
View article: Numerical modeling of temperature-reporting nanoparticle tracer for fractured geothermal reservoir characterization
Numerical modeling of temperature-reporting nanoparticle tracer for fractured geothermal reservoir characterization Open
Information on the temperature distribution of subsurface reservoirs is essential for geothermal energy development. One of the promising tools to detect the reservoir temperature distribution is temperature-reporting nanoparticle tracers …
View article: Estimation of seismic velocity changes in a HT-ATES system using THM modelling
Estimation of seismic velocity changes in a HT-ATES system using THM modelling Open
In Central Europe, a substantial emitter of CO2 in the energy sector corresponds to the thermal energy required for heating and cooling. Seasonal underground heat storage presents a viable option for storing excess heat generated during th…
View article: Risk of surface movements and reservoir deformation for high-temperature aquifer thermal energy storage (HT-ATES)
Risk of surface movements and reservoir deformation for high-temperature aquifer thermal energy storage (HT-ATES) Open
High-temperature aquifer thermal energy storage (HT-ATES) systems are designed for seasonal storage of large amounts of thermal energy to meet the demand of industrial processes or district heating systems at high temperatures (> 100 °C). …
View article: Risk Assessment of Fault Reactivation and Induced Seismicity for High-Temperature Heat Storage (Ht-Ates) at the Deepstor Demonstrator in the Upper Rhine Graben
Risk Assessment of Fault Reactivation and Induced Seismicity for High-Temperature Heat Storage (Ht-Ates) at the Deepstor Demonstrator in the Upper Rhine Graben Open
View article: Titania-mediated stabilization of fluorescent dye encapsulation in mesoporous silica nanoparticles
Titania-mediated stabilization of fluorescent dye encapsulation in mesoporous silica nanoparticles Open
A robust and stable encapsulation method for mesoporous silica nanoparticles, protecting the payload, preventing leakage and stabilizing the nanoparticles.
View article: GenEOS: An accurate equation of state for the fast calculation of two-phase geofluids properties based on gene expression programming
GenEOS: An accurate equation of state for the fast calculation of two-phase geofluids properties based on gene expression programming Open
Numerical simulation of two-phase multicomponent flows requires solving continuity, momentum, energy, and transport equations. Typically, these conservation equations are solved for computing the main variables of pressure, enthalpy, veloc…
View article: Optimizing scenarios of a deep geothermal aquifer storage in the southern Upper Rhine Graben
Optimizing scenarios of a deep geothermal aquifer storage in the southern Upper Rhine Graben Open
Based on a newly developed geological 3D reservoir model for the demonstration site of the ‘Freiburger Bucht’ in the Upper Rhine Graben (SW Germany), geothermal development and realization concepts of an aquifer thermal energy storage (ATE…
View article: Sample dataset for 'Numerical Evaluation on the Potential of Temperature-Sensitive Nanoparticle Tracers in Enhanced Geothermal Systems'
Sample dataset for 'Numerical Evaluation on the Potential of Temperature-Sensitive Nanoparticle Tracers in Enhanced Geothermal Systems' Open
<p>The archive contains the input-file and output results for an exemplary simulation using our in-house codes which are built on the finite element simulator-PorousFlow module within the MOOSE framework.<br>These results are t…
View article: Sample dataset for 'Numerical Evaluation on the Potential of Temperature-Sensitive Nanoparticle Tracers in Enhanced Geothermal Systems'
Sample dataset for 'Numerical Evaluation on the Potential of Temperature-Sensitive Nanoparticle Tracers in Enhanced Geothermal Systems' Open
<p>The archive contains the input-file and output results for an exemplary simulation using our in-house codes which are built on the finite element simulator-PorousFlow module within the MOOSE framework.<br>These results are t…
View article: Sample dataset for 'Numerical Evaluation on the Potential of Temperature-Sensitive Nanoparticle Tracers in Enhanced Geothermal Systems'
Sample dataset for 'Numerical Evaluation on the Potential of Temperature-Sensitive Nanoparticle Tracers in Enhanced Geothermal Systems' Open
The archive contains the input-file and output results for an exemplary simulation using our in-house codes which are built on the finite element simulator-PorousFlow module within the MOOSE framework.These results are the basis for the re…
View article: AnnRG - An artificial neural network solute geothermometer
AnnRG - An artificial neural network solute geothermometer Open
Solute artificial neural network geothermometers offer the possibility to overcome the complexity given by the solute-mineral composition. Herein, we present a new concept, trained from high-quality hydrochemical data and verified by in-si…
View article: Spatial Characterization of Channeling in Sheared Rough‐Walled Fractures in the Transition to Nonlinear Fluid Flow
Spatial Characterization of Channeling in Sheared Rough‐Walled Fractures in the Transition to Nonlinear Fluid Flow Open
Accurate quantification of spatially resolved fluid flow within fractures is crucial for successful reservoir development, such as Enhanced Geothermal Systems. This study presents an innovative workflow designed to model and characterize p…
View article: GeoLaB – Geothermal Laboratory in the crystalline Basement: synergies with research for a nuclear waste repository
GeoLaB – Geothermal Laboratory in the crystalline Basement: synergies with research for a nuclear waste repository Open
Challenges for geosciences with societal relevance include the use of crystalline geothermal reservoirs for the energy transition as well as final disposal. Crystalline rocks, along with clay and salt, are being considered as host rocks in…
View article: Challenges and Opportunities for Lithium Extraction from Geothermal Systems in Germany—Part 3: The Return of the Extraction Brine
Challenges and Opportunities for Lithium Extraction from Geothermal Systems in Germany—Part 3: The Return of the Extraction Brine Open
Lithium (Li) is considered a crucial element for energy transition due to its current irreplaceability in Li-ion batteries, particularly in electric vehicles. Market analysis indicates that Germany’s future automotive sector and planned ba…
View article: Developing meshing workflows for Geologic Uncertainty Assessment in High-Temperature Aquifer Thermal Energy Storage
Developing meshing workflows for Geologic Uncertainty Assessment in High-Temperature Aquifer Thermal Energy Storage Open
Evaluating uncertainties of geological features on temperature and pressure changes in reservoir’s fluids are crucial for a safe and sustainable operation of the High-Temperature Aquifer Thermal Energy Storage (HT-ATES). This study uses a …
View article: Importance of drilling-related processes on the origin of borehole breakouts — Insights from LWD observations
Importance of drilling-related processes on the origin of borehole breakouts — Insights from LWD observations Open
View article: Stochastic performance assessment on long-term behavior of multilateral closed deep geothermal systems
Stochastic performance assessment on long-term behavior of multilateral closed deep geothermal systems Open
Increasing the contribution of geothermal systems to green energy generation requires designing new innovative systems producing a significant amount of thermal power in a sustainable manner. The focus of this study is the performance eval…
View article: Transport mechanisms of hydrothermal convection in faulted tight sandstones
Transport mechanisms of hydrothermal convection in faulted tight sandstones Open
Motivated by the unknown reasons for a kilometre-scale high-temperature overprint of 270–300 ∘C in a reservoir outcrop analogue (Piesberg quarry, northwestern Germany), numerical simulations are conducted to identify the transport mechanis…
View article: Risk assessment of high-temperature heat storage (HT-ATES) at the DeepStor demonstrator site
Risk assessment of high-temperature heat storage (HT-ATES) at the DeepStor demonstrator site Open
In central Europe, the majority of the CO2 emissions in the energy sector are related to the provision of building and process heat. Due to seasonal fluctuations in demand, especially to provide heat for residential and industrial building…