Shale fault zone structure and stress dependent anisotropic permeability and seismic velocity properties (Opalinus Clay, Switzerland)

QC Wenning, C Madonna, A Zappone, M Grab… - Journal of Structural …, 2021 - Elsevier
Given shale's potential to serve as both a caprock for geological carbon sequestration and
as the host for nuclear waste disposal, this study focuses on the structural characterization …

Experimental deformation of Opalinus Clay at elevated temperature and pressure conditions: Mechanical properties and the influence of rock fabric

V Schuster, E Rybacki, A Bonnelye, J Herrmann… - Rock Mechanics and …, 2021 - Springer
The mechanical behavior of the sandy facies of Opalinus Clay (OPA) was investigated in 42
triaxial tests performed on dry samples at unconsolidated, undrained conditions at confining …

Strain partitioning and frictional behavior of opalinus clay during fault reactivation

V Schuster, E Rybacki, A Bonnelye, G Kwiatek… - Rock Mechanics and …, 2023 - Springer
Abstract The Opalinus Clay (OPA) formation is considered a suitable host rock candidate for
nuclear waste storage. However, the sealing integrity and long-term safety of OPA are …

Microstructural characterization of natural fractures and faults in the Opalinus Clay: insights from a deep drilling campaign across central northern Switzerland

IV Akker, R Schneeberger, M Herwegh… - Swiss journal of …, 2023 - Springer
Abstract The Middle-Jurassic Opalinus Clay is the foreseen host rock for radioactive waste
disposal in central northern Switzerland. An extensive drilling campaign aiming to …

The Sealing Mechanisms of a Fracture in Opalinus Clay as Revealed by in situ Synchrotron X-Ray Micro-Tomography

M Voltolini, JB Ajo-Franklin - Frontiers in Earth Science, 2020 - frontiersin.org
The detailed mechanisms of the sealing of a single fracture, from hydration to almost
complete closure by increase of confining pressure, as monitored from in situ synchrotron X …

Brittle deformation of carbonated peridotite—Insights from listvenites of the Samail Ophiolite (Oman Drilling Project Hole BT1B)

MD Menzel, JL Urai, JC de Obeso… - Journal of …, 2020 - Wiley Online Library
Hole BT1B of the Oman Drilling Project provides a continuous sampling from listvenite into
the metamorphic sole that preserves the deformation, hydration, and carbonation processes …

Physical characterization of fault rocks within the Opalinus Clay formation

LF Orellana, C Nussbaum, L Grafulha, P Henry… - Scientific Reports, 2022 - nature.com
Near-surface disposal of radioactive waste in shales is a promising option to safeguard the
population and environment. However, natural faults intersecting these geological …

A comparative study on methods for determining the hydraulic properties of a clay shale

L Winhausen, A Amann-Hildenbrand… - Geophysical Journal …, 2021 - academic.oup.com
SUMMARY A comprehensive characterization of clay shale behavior requires quantifying
both geomechanical and hydromechanical characteristics. This paper presents a …

The effect of fault architecture on slip behavior in shale revealed by distributed fiber optic strain sensing

C Hopp, Y Guglielmi, AP Rinaldi… - Journal of …, 2022 - Wiley Online Library
Abstract We use Distributed Strain Sensing (DSS) through Brillouin scattering
measurements to characterize the reactivation of a fault zone in shale (Opalinus clay) …

Grain-scale deformation mechanisms and evolution of porosity in experimentally deformed Boom Clay

B Schuck, G Desbois, JL Urai - Journal of Structural Geology, 2020 - Elsevier
Boom Clay is a soft, slightly overconsolidated, uncemented claystone considered as
potential host material for a radioactive waste repository in Belgium. We studied the …