scholarly journals Supplemental Material: Drill core from seismically active sandstone gas reservoir yields clues to internal deformation mechanisms

2020 ◽  
Author(s):  
Berend Verberne ◽  
Suzanne Hangx ◽  
et al.
Keyword(s):  
Deformation Mechanisms ◽  
Drill Core ◽  
Gas Reservoir ◽  
Internal Deformation

Detailed description of the materials and methods employed in this study, Figures S1–S8, and Tables S1–S4.<br>

scholarly journals Supplemental Material: Drill core from seismically active sandstone gas reservoir yields clues to internal deformation mechanisms

2020 ◽  
Author(s):  
Berend Verberne ◽  
Suzanne Hangx ◽  
et al.
Keyword(s):  
Deformation Mechanisms ◽  
Drill Core ◽  
Gas Reservoir ◽  
Internal Deformation

Detailed description of the materials and methods employed in this study, Figures S1–S8, and Tables S1–S4.<br>

scholarly journals Drill core from seismically active sandstone gas reservoir yields clues to internal deformation mechanisms

Geology ◽  
2020 ◽  
Author(s):  
Berend A. Verberne ◽  
Suzanne J.T. Hangx ◽  
Ronald P.J. Pijnenburg ◽  
Maartje F. Hamers ◽  
Martyn R. Drury ◽  
...  
Keyword(s):  
Microstructural Analysis ◽  
Gas Production ◽  
Drill Core ◽  
Gas Reservoir ◽  
Gas Field ◽  
Reservoir Compaction ◽  
Key Factor ◽  
Forecasting System ◽  
Internal Deformation ◽  
Dauphiné Twinning

Europe’s largest gas field, the Groningen field (the Netherlands), is widely known for induced subsidence and seismicity caused by gas pressure depletion and associated compaction of the sandstone reservoir. Whether compaction is elastic or partly inelastic, as implied by recent experiments, is a key factor in forecasting system behavior and seismic hazard. We sought evidence for inelastic deformation through comparative microstructural analysis of unique drill core recovered from the seismogenic center of the field in 2015, 50 yr after gas production started, versus core recovered before production (1965). Quartz grain fracturing, crack healing, and stress-induced Dauphiné twinning are equally developed in the 2015 and 1965 cores, with the only measurable effect of gas production being enhanced microcracking of sparse K-feldspar grains in the 2015 core. Interpreting these grains as strain markers, we suggest that reservoir compaction involves elastic strain plus inelastic compression of weak clay films within grain contacts.

Computational Modelling of Closed-Cell Aluminium Foams to Investigate Structural Deformation under Quasi-Static Loading

2016 ◽  
Vol 846 ◽  
pp. 133-138 ◽  
Author(s):  
Md Abdul Kader ◽  
Md Ashraful Islam ◽  
Paul Jonathan Hazell ◽  
Juan Pablo Escobedo ◽  
Mohammad Saadatfar ◽  
...  
Keyword(s):  
Cell Walls ◽  
Computational Modelling ◽  
Deformation Mechanisms ◽  
Structural Deformation ◽  
Micro Computed Tomography ◽  
Static Compression ◽  
Closed Cell ◽  
Scale Modelling ◽  
Internal Deformation ◽  
Quasi Static Compression

Computational modelling has been performed to understand the deformation mechanisms of closed-cell aluminium foams under quasi-static compression. A micro-computed tomography-based 3D foam geometry was developed that described the interior of the foam. The FE software ABAQUS/Explicit has been used for the present meso-scale modelling. A good correlation of load-strain response was found between the simulations and experimental results. A sectional view was observed during deformation to explore the internal deformation mechanisms. It was revealed that localized cell collapse occurs due to complex movements of the cell-walls with thin/weaker cells being deformed faster than thick/stronger cells.

Deformation mechanisms and fluid behavior in a shallow, brittle fault zone during coseismic and interseismic periods: Results from drill core penetrating the Nojima Fault, Japan

Island Arc ◽  
2001 ◽  
Vol 10 (3-4) ◽  
pp. 381-391 ◽  
Author(s):  
Hidemi Tanaka ◽  
Shin-Ichiro Hinoki ◽  
Kazuo Kosaka ◽  
Aiming Lin ◽  
Keiji Takemura ◽  
...  
Keyword(s):  
Fault Zone ◽  
Deformation Mechanisms ◽  
Drill Core ◽  
Fluid Behavior ◽  
Nojima Fault

Deformation mechanisms and fluid behavior in a shallow, brittle fault zone during coseismic and interseismic periods: Results from drill core penetrating the Nojima Fault, Japan

Island Arc ◽  
2008 ◽  
Vol 10 (3-4) ◽  
pp. 381-391 ◽  
Author(s):  
Hidemi Tanaka ◽  
Shin-Ichiro Hinoki ◽  
Kazuo Kosaka ◽  
Aiming Lin ◽  
Keiji Takemura ◽  
...  
Keyword(s):  
Fault Zone ◽  
Deformation Mechanisms ◽  
Drill Core ◽  
Fluid Behavior ◽  
Nojima Fault

The Effect of Secondary Metalworking Processes on Susceptibility of Aircraft to Catastrophic Failures and Prevention Methods

2013 ◽  
Vol 58 (4) ◽  
pp. 1207-1212
Author(s):  
E.S. Dzidowski
Keyword(s):  
Dynamic Recovery ◽  
Fatigue Cracks ◽  
Shear Bands ◽  
Adiabatic Shear ◽  
Deformation Mechanisms ◽  
Processing Maps ◽  
Adiabatic Shear Bands ◽  
Flow Localization ◽  
Catastrophic Failures ◽  
Prevention Methods

Abstract The causes of plane crashes, stemming from the subcritical growth of fatigue cracks, are examined. It is found that the crashes occurred mainly because of the negligence of the defects arising in the course of secondary metalworking processes. It is shown that it is possible to prevent such damage, i.e. voids, wedge cracks, grain boundary cracks, adiabatic shear bands and flow localization, through the use of processing maps indicating the ranges in which the above defects arise and the ranges in which safe deformation mechanisms, such as deformation in dynamic recrystallization conditions, superplasticity, globularization and dynamic recovery, occur. Thanks to the use of such maps the processes can be optimized by selecting proper deformation rates and forming temperatures.

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