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Precursory Signals to Injection Induced Fault Reactivation in the Laboratory Using Active Ultrasonic Monitoring Methods

Veltmeijer, A.V. (author), Naderloo, M. (author), Pluymakers, Anne (author), Barnhoorn, A. (author)

Induced earthquakes are still highly unpredictable, and often caused by variations in pore fluid pressure. Monitoring and understanding the mechanisms of fluid-induced fault slip is essential for seismic risk mitigation and seismicity forecasting. Fluid-induced slip experiments were performed on critically stressed faulted sandstone samples,...

journal article 2024

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Feasibility of reservoir monitoring in the Groningen gas field using ghost reflections from seismic interferometry

Shirmohammadi, F. (author), Draganov, D.S. (author), Veltmeijer, A.V. (author), Naderloo, M. (author), Barnhoorn, A. (author)

Seismic interferometry (SI) retrieves new seismic responses, for example reflections, between either receivers or sources. When SI is applied to a reflection survey with active sources and receivers at the surface, non-physical (ghost) reflections are retrieved as well. Ghost reflections, retrieved from the correlation of two primary...

journal article 2024

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Experimental and numerical investigation of sandstone deformation under cycling loading relevant for underground energy storage

Naderloo, M. (author), Ramesh Kumar, K. (author), Hernandez, Edgar (author), Hajibeygi, H. (author), Barnhoorn, A. (author)

Considering the storage capacity and already existing infrastructures, underground porous reservoirs are highly suitable to store green energy, for example, in the form of green gases such as hydrogen and compressed air. Depending on the energy demand and supply, the energy-rich fluids are injected and produced, which induces cyclic change of...

journal article 2023

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Laboratory experiments on the effects of corrosion inhibitor on the mechanical properties of reservoir rock

Kortram, J. (author), Barnhoorn, A. (author), Pluymakers, Anne (author)

Geothermal energy production often involves use of corrosion inhibitors. We performed rock mechanical experiments (room temperature; confining pressure of 10/20/30 MPa) on typical reservoir rocks (Bentheim sandstone and Treuchtlinger limestone) in contact with two different inhibitor solutions or with demineralized water. The sandstone...

journal article 2023

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Effect of a singular planar heterogeneity on tensile failure

Pluymakers, Anne (author), Bakker, R.R. (author), Ter Steege, F.B. (author), Versluis, B. (author), Barnhoorn, A. (author)

Many rocks contain planar heterogeneities, in the form of open fractures, veins and/or stylolites, but scarce data exist on how strength and fracture pattern formation is affected by the presence of a singular planar heterogeneity in an otherwise uniform matrix. The mechanics of stylolite-bearing and/or fractured limestone is of interest to...

journal article 2023

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Storing CO₂ in geothermal reservoir rocks from the Kizildere field, Turkey: Combined stress, temperature, and pore fluid dependence of seismic properties

Janssen, M.T.G. (author), Draganov, D.S. (author), Barnhoorn, A. (author), Wolf, K.H.A.A. (author)

As part of a seismic monitoring project in a geothermal field, where the feasibility of re-injection and storage of produced CO₂ is being investigated, a P- and S-wave seismic velocity characterisation study was carried out. The effect of axial and radial (up to 42 MPa) stress, pore pressure (up to 17 MPa), pore fluid (100% brine...

journal article 2023

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Laboratory study on the effect of stress cycling pattern and rate on seismicity evolution

Naderloo, M. (author), Veltmeijer, A.V. (author), Jansen, J.D. (author), Barnhoorn, A. (author)

Recent laboratory and field studies suggest that temporal variations in injection patterns (e.g., cyclic injection) might trigger less seismicity than constant monotonic injection. This study presents results from uniaxial compressive experiments performed on Red Felser sandstone samples providing new information on the effect of stress...

journal article 2023

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An Advanced Discrete Fracture Methodology for Fast, Robust, and Accurate Simulation of Energy Production From Complex Fracture Networks

de Hoop, S. (author), Voskov, D.V. (author), Bertotti, G. (author), Barnhoorn, A. (author)

Fracture networks are abundant in subsurface applications (e.g., geothermal energy production, CO₂ sequestration). Fractured reservoirs often have a very complex structure, making modeling flow and transport in such networks slow and unstable. Consequently, this limits our ability to perform uncertainty quantification and increases...

journal article 2022

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The Stress-Memory Effect of Fracture Stiffness During Cyclic Loading in Low-Permeability Sandstone

Kluge, C. (author), Blöcher, Guido (author), Hofmann, Hannes (author), Barnhoorn, A. (author), Schmittbuhl, Jean (author), Bruhn, D.F. (author)

The hydraulic performance and mechanical stability of open fractures are crucial for several subsurface applications including fractured geothermal reservoirs or nuclear waste repositories. Their hydraulic and mechanical properties (fluid flow and fracture stiffness) are both strongly dependent on the fracture geometry. Any change in...

journal article 2021

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Experimental evidence that viscous shear zones generate periodic pore sheets

Gilgannon, James (author), Waldvogel, Marius (author), Poulet, Thomas (author), Fusseis, Florian (author), Berger, Alfons (author), Barnhoorn, A. (author), Herwegh, Marco (author)

In experiments designed to understand deep shear zones, we show that periodic porous sheets emerge spontaneously during viscous creep and that they facilitate mass transfer. These findings challenge conventional expectations of how viscosity in solid rocks operates and provide quantitative data in favour of an alternative paradigm, that of...

journal article 2021

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Seismic velocity characterisation of geothermal reservoir rocks for CO₂ storage performance assessment

Janssen, M.T.G. (author), Barnhoorn, A. (author), Draganov, D.S. (author), Wolf, K.H.A.A. (author), Durucan, Sevket (author)

As part of a seismic monitoring project in a geothermal field, where the feasibility of re-injection and storage of produced CO₂ is being investigated, a P-and S-wave seismic velocity characterisation study was carried out. The effect of axial (up to 95 MPa) and radial (up to 60 MPa) stress on the seismic velocity was studied in...

journal article 2021

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Micromagnetic Tomography for Paleomagnetism and Rock-Magnetism

de Groot, Lennart V. (author), Fabian, Karl (author), Béguin, Annemarieke (author), Kosters, Martha E. (author), Cortés-Ortuño, David (author), Fu, Roger R. (author), Jansen, Chloë M.L. (author), Harrison, Richard J. (author), van Leeuwen, Tristan (author), Barnhoorn, A. (author)

Our understanding of the past behavior of the geomagnetic field arises from magnetic signals stored in geological materials, e.g., (volcanic) rocks. Bulk rock samples, however, often contain magnetic grains that differ in chemistry, size, and shape; some of them record the Earth's magnetic field well, others are unreliable. The presence of a...

journal article 2021

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Permeability Evolution During Shear Zone Initiation in Low-Porosity Rocks

Kluge, C. (author), Blöcher, Guido (author), Barnhoorn, A. (author), Schmittbuhl, Jean (author), Bruhn, D.F. (author)

Using an innovative experimental set-up (Punch-Through Shear test), we initiated a shear zone (microfault) in Flechtingen sandstone and Odenwald granite under in situ reservoir conditions while monitoring permeability and fracture dilation evolution. The shear zone, which has a cylindrical geometry, is produced by a self-designed piston...

journal article 2021

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Ion-species in pore fluids with opposite effects on limestone fracturing

Pluymakers, Anne (author), Ougier-Simonin, A. (author), Barnhoorn, A. (author)

At ten percent of sedimentary rocks, limestones are common geo-energy reservoirs. Being highly soluble, limestones are prone to fluid-assisted deformation and their mechanical behaviour likely susceptible to fluid chemistry. In this study, we saturated limestone samples with 0.4 M MgSO₄ or 0.4 M Na₂SO₄ CaCO...

journal article 2021

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Dynamic Recrystallization Can Produce Porosity in Shear Zones

Gilgannon, James (author), Poulet, Thomas (author), Berger, Alfons (author), Barnhoorn, A. (author), Herwegh, Marco (author)

Creep cavities are increasingly recognized as an important syn-kinematic feature of shear zones, but much about this porosity needs investigation. Largely, observations of creep cavities are restricted to very fine grained mature ultramylonites, and it is unclear when they developed during deformation. Specifically, a question that needs...

journal article 2020

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Mechanical controls on horizontal stresses and fracture behaviour in layered rocks: A numerical sensitivity analysis

Boersma, Q.D. (author), Douma, L.A.N.R. (author), Bertotti, G. (author), Barnhoorn, A. (author)

In layered materials, the deformation style, orientation, confinement, and 3D connectivity of natural fractures is generally impacted by changes in sedimentary facies and alternations in mechanical properties. In this study we address this effect and perform a numerical sensitivity analysis. Mechanical properties, confining pressures, and...

journal article 2020

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Ultrasonic Imaging of the Onset and Growth of Fractures Within Partially Saturated Whitby Mudstone Using Coda Wave Decorrelation Inversion

Zotz-Wilson, R.D. (author), Douma, L.A.N.R. (author), Sarout, Joel (author), Dautriat, Jeremie (author), Dewhurst, David (author), Barnhoorn, A. (author)

Using active ultrasonic source survey data, coda wave decorrelation (CWD) time-lapse imaging during the triaxial compression of Whitby Mudstone cores provides a 3-D description of the evolution and redistribution of inelastic strain concentrations. Acoustic emissions (AEs) monitoring is also performed between any two consecutive surveys. From...

journal article 2020

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Fracture-Induced Permeability in Whitby Mudstone

Houben, Maartje E. (author), van Eeden, Jasmijn C.M. (author), Barnhoorn, A. (author), Hangx, Suzanne J.T. (author)

Shale host rock and containment potential are largely determined by the connected pore network in the rock, and the connection between the pore network and the naturally present or mechanically induced fracture network together determines the total bulk permeability. Pore connectivity in shales is poorly understood because most of the...

journal article 2020

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Hydraulic-mechanical properties of microfaults in granitic rock using the Punch-Through Shear test

Kluge, C. (author), Blöcher, Guido (author), Barnhoorn, A. (author), Bruhn, D.F. (author)

Fault zones are key features in crystalline geothermal reservoirs or in other subsurface environments due to the fact that they act as main fluid pathways. An adequate experimental description of the evolution of permeability of a realistic microscopic fault zone under in-situ reservoir and fracture parallel flow conditions is required. To...

journal article 2020

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Coda-wave monitoring of continuously evolving material properties and the precursory detection of yielding

Zotz-Wilson, R.D. (author), Boerrigter, Thijs (author), Barnhoorn, A. (author)

The nominally incoherent coda of a scattered wavefield has been shown to be a remarkably sensitive quantitive monitoring tool. Its success is, however, often limited to applications where only moderate or localised changes in the scattering properties of the medium can be assumed. However, the compressional deformation of a relatively...

journal article 2019