Mohammadreza Jalali
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View article: Multi-Scale Hydraulic and Petrophysical Characterization of a Heterogeneous Fault Zone in the Gotthard Massif's Crystalline Basement
Multi-Scale Hydraulic and Petrophysical Characterization of a Heterogeneous Fault Zone in the Gotthard Massif's Crystalline Basement Open
Accurately characterizing fault zones in crystalline basement rocks is essential for understanding fluid migration in the Earth's crust and how this influences fault stability and seismicity. While it is known that fault zones exhibit stro…
View article: A review of thermo-hydro-mechanical modeling of coupled processes in fractured rock: From continuum to discontinuum perspective
A review of thermo-hydro-mechanical modeling of coupled processes in fractured rock: From continuum to discontinuum perspective Open
View article: Long-term cyclic thermo–mechanical behavior of vertical and horizontal salt caverns for hydrogen storage
Long-term cyclic thermo–mechanical behavior of vertical and horizontal salt caverns for hydrogen storage Open
Underground salt caverns are considered viable options for hydrogen storage owing to their favorable geological properties and large storage capacity. However, during underground hydrogen storage operations, the circumference of the salt c…
View article: The influence of burial history on physical properties of claystones – Overview of a systematic research program across scales
The influence of burial history on physical properties of claystones – Overview of a systematic research program across scales Open
The search for a suitable host rock for the deep geological disposal of high-level radioactive waste is one of the major geological challenges of our time. In Germany, alongside rock salt and crystalline rock, claystones are considered a p…
View article: Numerical analysis of far-field fault reactivation induced by reservoir cooling
Numerical analysis of far-field fault reactivation induced by reservoir cooling Open
This study presents a thermo-hydro-mechanical framework to model hydrothermal systems within a simplified faulted synthetic reservoir, replicating current production scenarios in The Netherlands and Germany. The reservoir, composed of poro…
View article: Numerical modeling of hydro-mechanical processes during hydraulic testing of pre-existing fractures at the Grimsel Test Site, Switzerland
Numerical modeling of hydro-mechanical processes during hydraulic testing of pre-existing fractures at the Grimsel Test Site, Switzerland Open
This study presents a fully coupled hydro-mechanical framework for modeling hydraulic shearing in a mesoscale reservoir located at the Grimsel Test Site, Switzerland. The experiment was conducted on a ductile-brittle fault embedded in low-…
View article: Selection and characterization of the target fault for fluid-induced activation and earthquake rupture experiments
Selection and characterization of the target fault for fluid-induced activation and earthquake rupture experiments Open
Performing stimulation experiments at approximately 1 km depth in the Bedretto Underground Laboratory for Geosciences and Geoenergies necessitates identifying and characterizing the target fault zone for on-fault monitoring of induced faul…
View article: Experimental and numerical analysis of injection-induced permeability changes in pre-existing fractures
Experimental and numerical analysis of injection-induced permeability changes in pre-existing fractures Open
This paper presents a combined laboratory and numerical investigation on the injection-induced permeability changes in pre-existing fractures. The analyses conducted were primarily based on the results of an innovative laboratory experimen…
View article: The Impact of Injection Protocol and Stress Preconditioning on the Hydro-Mechanical Response of the Crystalline Rock
The Impact of Injection Protocol and Stress Preconditioning on the Hydro-Mechanical Response of the Crystalline Rock Open
Hydraulic stimulation has been extensively utilized in the geothermal industry as the primary technique to create and develop an efficient heat exchanger in a low-permeable reservoir rock. This technique entails high-pressure fluid injecti…
View article: Exploring the Hydro-Mechanical Behavior of Fractures Utilizing the mini-SIMFIP Probe
Exploring the Hydro-Mechanical Behavior of Fractures Utilizing the mini-SIMFIP Probe Open
The SIMFIP (Step-rate Injection Method for Fracture In-situ Properties) probe is a downhole displacement tool designed to measure injection-driven fracture displacement in an isolated borehole interval in three dimensions. The resulting di…
View article: The Influence of Burial History on the In-situ Petrophysical and Mechanical Characteristics of Pliensbachian Shale
The Influence of Burial History on the In-situ Petrophysical and Mechanical Characteristics of Pliensbachian Shale Open
Characterizing the host rocks for high-level radioactive waste disposal requires considering various rock parameters such as petrophysical (e.g., porosity, permeability and storativity) as well as mechanical (e.g., Young’s modulus) p…
View article: Characterization and 3D geometrical modelling of a complex fault zone for earthquake rupture experiments
Characterization and 3D geometrical modelling of a complex fault zone for earthquake rupture experiments Open
Fault zone geological and geometrical complexities are prime parameters playing a fundamental role in controlling the characteristics of both natural and induced seismicity. In the Bedretto tunnel (Switzerland), the Fault Activation and Ea…
View article: Hydraulic Stimulation Experiments in a Decimeter-scale True Triaxial Compressive Apparatus
Hydraulic Stimulation Experiments in a Decimeter-scale True Triaxial Compressive Apparatus Open
Geothermal energy is considered a sustainable energy source for the transition to a carbon-neutral economy. In Central Europe, sufficiently hot source rocks are buried deep underground and comprise tight crystalline basement formations. To…
View article: Time-dependent deformation behavior of Opalinus Clay: A triaxial multi-step creep study under fully drained conditions
Time-dependent deformation behavior of Opalinus Clay: A triaxial multi-step creep study under fully drained conditions Open
Ensuring the long-term integrity of deep geological repositories for nuclear waste, i.e., safety and sustainability, remains a critical concern for disposal solutions. Reliable predictions on long-term rock mass behavior require a precise …
View article: Fault activation from up close
Fault activation from up close Open
Our understanding of earthquake rupture processes is generally limited by the resolution of available observations. In all but exceptional cases, earthquake observations are made at comparatively large distances from the rupture itself, wh…
View article: Selection and Characterisation of the Target Fault for Fluid-Induced Activation and Earthquake Rupture Experiments
Selection and Characterisation of the Target Fault for Fluid-Induced Activation and Earthquake Rupture Experiments Open
Performing stimulation experiments at approximately 1 km depth in the Bedretto Underground Laboratory for Geosciences and Geoenergies necessitates identifying and characterizing the target fault zone for on-fault monitoring of induced faul…
View article: Numerical Analysis of Far-Field Fault Reactivation Induced by Reservoir Cooling
Numerical Analysis of Far-Field Fault Reactivation Induced by Reservoir Cooling Open
View article: Long-Term Cyclic Thermo-Mechanical Behavior of Vertical and Horizontal Salt Caverns for Hydrogen Storage
Long-Term Cyclic Thermo-Mechanical Behavior of Vertical and Horizontal Salt Caverns for Hydrogen Storage Open
View article: The Anisotropic Behavior of a Clay Shale: Strength, Hydro‐Mechanical Couplings and Failure Processes
The Anisotropic Behavior of a Clay Shale: Strength, Hydro‐Mechanical Couplings and Failure Processes Open
Many rocks exhibit a structural composition, which leads to an anisotropic behavior of different properties. A proper understanding of the directional dependency of these properties is required to analyze and predict the failure behavior o…
View article: Comparison of two approaches for modelling fracture opening due to cold water injection in geothermal reservoir
Comparison of two approaches for modelling fracture opening due to cold water injection in geothermal reservoir Open
Heat and electricity production from deep hot reservoirs through hydrothermal or petrothermal system requires to inject cold fluid in a naturally or artificially fractured medium. Cold water injection in a hot reservoirs causes thermo-hydr…
View article: High‐Resolution Characterization of Excavation‐Induced Fracture Network Using Continuous and Discrete Inversion Schemes
High‐Resolution Characterization of Excavation‐Induced Fracture Network Using Continuous and Discrete Inversion Schemes Open
The Meuse/Haute‐Marne Underground Research Laboratory provides the location for the experiment designed to investigate the induced fracture network around open or sealed galleries and drifts. The objective of this study is to investigate a…
View article: An Attempt to Control Induced Seismicity and On-Fault Stress Pre-Conditioning in the Bedretto Underground Laboratory, Switzerland
An Attempt to Control Induced Seismicity and On-Fault Stress Pre-Conditioning in the Bedretto Underground Laboratory, Switzerland Open
Hydraulic stimulation has been used as a standard practice for rock mass treatment to fulfill the intended engineering goal of the stimulation procedure in various applications such as oil & gas, mining, and enhanced geothermal systems (EG…
View article: Characterization of the highly fractured zone at the Grimsel Test Site based on hydraulic tomography
Characterization of the highly fractured zone at the Grimsel Test Site based on hydraulic tomography Open
In this study, we infer the structural and hydraulic properties of the highly fractured zone at the Grimsel Test Site in Switzerland using a stochastic inversion method. The fractured rock is modeled directly as a discrete fracture network…
View article: Comment on hess-2022-209
Comment on hess-2022-209 Open
Abstract. In this study, we infer the structural and hydraulic properties of the highly fractured zone at the Grimsel Test Site in Switzerland using a stochastic inversion method. The fractured rock is modeled directly as …
View article: Comment on hess-2022-209
Comment on hess-2022-209 Open
Abstract. In this study, we infer the structural and hydraulic properties of the highly fractured zone at the Grimsel Test Site in Switzerland using a stochastic inversion method. The fractured rock is modeled directly as …
View article: Characterization of the highly fractured zone at the Grimsel test site based on hydraulic tomography
Characterization of the highly fractured zone at the Grimsel test site based on hydraulic tomography Open
In this study, we infer the structural and hydraulic properties of the highly fractured zone at the Grimsel test site in Switzerland by a stochastic inversion method. The fractured rock is modeled directly as a discrete fracture network (D…
View article: Failure mode transition in Opalinus Clay: a hydro-mechanical and microstructural perspective
Failure mode transition in Opalinus Clay: a hydro-mechanical and microstructural perspective Open
The way rocks deform under changing stress conditions can be described by different deformation modes, which is fundamental for understanding their rheology. For Opalinus Clay, which is regarded as a potential host rock for nuclear waste, …
View article: Inversion of Hydraulic Tomography Data from the Grimsel Test Site with a Discrete Fracture Network Model
Inversion of Hydraulic Tomography Data from the Grimsel Test Site with a Discrete Fracture Network Model Open
<p>This study aims at the stochastic characterization of fractured rocks with a low-permeability matrix based on transient data from hydraulic tomography experiments. In such rocks, fractures function as main flowpaths. Therefore, ad…
View article: Comment on se-2022-19
Comment on se-2022-19 Open
Abstract. The way rocks deform under changing stress conditions can be described by different deformation modes, which is fundamental for understanding their rheology. For Opalinus Clay, which is regarded as a potential ho…
View article: Failure mode transition in Opalinus Clay: a hydro-mechanical and microstructural perspective
Failure mode transition in Opalinus Clay: a hydro-mechanical and microstructural perspective Open
The way rocks deform under changing stress conditions can be described by different deformation modes, which is fundamental for understanding their rheology. For Opalinus Clay, which is considered as a potential host rock for nuclear waste…