Mark Jefferd
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View article: Nanoscale experiments of intergranular dissolution-precipitation to understand deformation mechanisms in the upper crust.  
Nanoscale experiments of intergranular dissolution-precipitation to understand deformation mechanisms in the upper crust.   Open
In the upper crust, rock deformation commonly occurs in the presence of aqueous fluids, which are known to alter the material's response to stress. These fluids facilitate dissolution and precipitation, driving changes in the mineral compo…
View article: Reservoir compaction during and after fluid production: A case study of the Groningen Gas Field
Reservoir compaction during and after fluid production: A case study of the Groningen Gas Field Open
Prolonged hydrocarbon production often leads to subsidence and seismicity in offshore and onshore hydrocarbon fields. In the Netherlands, tens of centimetres of subsidence has occurred above the Groningen Gas Field, with widespread induced…
View article: The effect of loading rate on the mechanical behaviour and deformation mechanisms in reservoir sandstones
The effect of loading rate on the mechanical behaviour and deformation mechanisms in reservoir sandstones Open
<p>The removal of pore fluids from sandstone reservoirs during hydrocarbon production, geothermal energy production, or when using geo-storage techniques may increase the effective overburden pressure on the host rock. The increased …
View article: Compactive Deformation of Sandstone Under Crustal Pressure and Temperature Conditions
Compactive Deformation of Sandstone Under Crustal Pressure and Temperature Conditions Open
The transition from macroscopically brittle to macroscopically ductile deformation in porous sandstones is known to be pressure dependent, with compactive, ductile behavior occurring only once significant effective pressures have been reac…
View article: Pore network analysis of Brae Formation sandstone, North Sea
Pore network analysis of Brae Formation sandstone, North Sea Open
In this work, we apply digital rock physics (DRP) to characterize the pore networks of the Brae Formation
\nsandstones from two different wells in the Miller field area (North Sea, UK). Using X-ray micro-CT scans, we
\ncalculate the porosi…
View article: Insights into anisotropy development and weakening of ice from in situ <i>P</i> wave velocity monitoring during laboratory creep
Insights into anisotropy development and weakening of ice from in situ <i>P</i> wave velocity monitoring during laboratory creep Open
Polycrystalline ice weakens significantly after a few percent strain, during high homologous temperature deformation. Weakening is correlated broadly with the development of a crystallographic preferred orientation (CPO). We deformed synth…