On the swelling behavior of shallow Opalinus Clay shale

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Disposal of radioactive waste in deep geological repositories relies on the integrity of geological barriers, where gas migration can compromise long-term safety. This study examines the hydro-mechanical response of a shale under varying gas pressure build ...

Advanced geotechnical engineering applications, such as shale gas extraction, CO2 geological sequestration, and geological radioactive waste storage, often involve various types of shales located at significant depths. Shales exhibit mechanical properties ...

The note presents selected results of an experimental campaign conducted with the aim to investigate the hydro-mechanical behaviour of a shale recovered at a depth of about 900 m below the ground. High-pressure oedometric tests were performed to investigat ...

Opalinus Clay is the shale currently under investigation as the host formation for geological radioactive waste disposal in Switzerland. Its hydromechanical response has been widely studied, and the experimental results show a range of values whose dispers ...

The testing procedure and results on saturated samples of Opalinus Clay in the work of Schuster et al. (Rock Mech Rock Eng https://doi.org/10.1007/ s00603-021-02474-3, 2021) were conducted and presented using strain rates two to four orders of magnitudes h ...

Interest in the hydraulic and mechanical characterization of shales has grown in recent years, because of their application in the context of energy geotechnics. In the frame of nuclear waste disposal shales are considered as host formations for the placem ...

Gas shales are usually partially saturated due to hydrocarbon generation and often have a low in-situ degree of saturation less than 40 %. During stimulation, substantial fluid imbibition into the formation occurs due to high suction. Recent research on th ...

Shales are sedimentary formation currently studied for their involvement in many geo-energy related applications, such as radioactive waste disposal, CO2 sequestration, oil and gas extraction. In Switzerland the Opalinus Clay shale has been selected has ho ...

The safe storage of CO2 in deep reservoir units requires an efficient sealing of the overlaying caprock. The acidic environment caused by the dissolution of CO2 into the pore fluid can induce changes in the microstructure of the material over the long term ...

Water uptake of gas shales is commonly considered one of the most important factors responsible for fluid loss during flowback operations after hydraulic fracturing. Imbibition experiments cover a key role in this context to analyze the impact of several f ...

Water loss during flowback operations represents one of the main challenges related to the use of hydraulic stimulation to exploit shale gas resources. About 20% of the injected fracturing fluids are usually recovered after stimulation. Fluid imbibition is ...

Laboratory measurement of mechanical properties of gas shales represents a challenging topic in geomechanics due to their peculiar features such as heterogeneity, anisotropy, low permeability, and complex physical phenomena related to the hydro-mechanical ...

Elastic properties of gas shales are of utmost importance for the exploitation of shale gas reservoirs. Static elastic properties are usually measured by performing unloading-reloading cycles in uniaxial or triaxial compressive tests. The response of gas s ...

An experimental investigation to analyse the anisotropic volumetric response of shaly and sandy facies of Opalinus Clay upon suction variations is presented. Obtained results demonstrate the different behaviour of the tested facies to a wetting-drying cycl ...

The constitutive modeling of shales is an important topic in the geomechanics community as it is often encountered in advanced applications such as nuclear waste storage, CO2 sequestration, and unconventional oil and gas exploitation. The goal of this work ...

In the light of growing concerns for the climate change, it is of particular interest for governments to encourage efficient capture and safe storage of large amounts of carbon dioxide in the subsurface. In this perspective and in order to accurately predi ...

The geo-energy sector makes use of advanced technologies such as shale gas extraction, CO2 sequestration and nuclear waste geological disposal that rely on the exploitation of shale formations. Due to the great depths involved in these applications and the ...

Opalinus Clay shale is under consideration to serve as the host geomaterial for the underground storage of nuclear waste in Switzerland. Water retention behaviour and anisotropic behaviour represent two main features of this geomaterial; however, a compreh ...

Shales are among the most commonly considered geomaterials in current energy-related geomechanical investigations, as they are involved in engineering applications such as the unconventional extraction of natural gas, CO2 sequestration and nuclear waste ge ...

On the swelling behavior of shallow Opalinus Clay shale

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Hydro-mechanical insights for radioactive waste disposal from gas injection experiments in shale

Evolution of water content and suction of Opalinus Clay from recovery at the drilling site to handling in the laboratory

Hydro-Mechanical Characterization of a Shale by Unusually High-Pressure Oedometric Tests

Effect of the mineralogical composition on the elastoplastic hydromechanical response of Opalinus Clay shale

Discussion on "Experimental Deformation of Opalinus Clay at Elevated Temperature and Pressure Conditions: Mechanical Properties and the Influence of Rock Fabric" of Schuster, V., Rybacki, E., Bonnelye, A., Herrmann, J., Schleicher, AM, Dresen, G

Numerical investigation on water exchange of shale samples

Developing a high capacity axis translation apparatus for gas shale testing

Hydro-mechanical response of Opalinus Clay shale: dependency on composition and burial depth

Impact of CO2 injection on the hydro-mechanical behaviour of a clay-rich caprock

The impact of the volumetric swelling behavior on the water uptake of gas shale

Gas shale water imbibition tests with controlled suction technique

Gas Shales Testing in Controlled Partially Saturated Conditions

Elastic behavior of partially saturated gas shales during unloading - reloading cycles in uniaxial compression

Laboratory testing of gas shales in unsaturated conditions

The Role of Anisotropy on the Volumetric Behaviour of Opalinus Clay upon Suction Change

Plastic-damage modeling of saturated quasi-brittle shales

Quantification of Viscous Creep Influence on Storage Capacity of Caprock

On the Hydro-Mechanical Behaviour of Remoulded and Natural Opalinus Clay Shale

Anisotropic volumetric behaviour of Opalinus Clay shale upon suction variation

Testing of the hydro-mechanical behaviour of shales