All Outputs (4)

Storage Coefficients and Permeability Functions for Coal-Bed Methane Production Under Uniaxial Strain Conditions (2019)
Journal Article
Mathias, S. A., Nielsen, S., & Ward, R. L. (2019). Storage Coefficients and Permeability Functions for Coal-Bed Methane Production Under Uniaxial Strain Conditions. Transport in Porous Media, 130(2), 627-636. https://doi.org/10.1007/s11242-019-01331-w

The porosity and permeability of coal change with pore pressure, due to changes in effective stress and matrix swelling due to gas adsorption. Three analytical models to describe porosity and permeability change in this context have been presented in... Read More about Storage Coefficients and Permeability Functions for Coal-Bed Methane Production Under Uniaxial Strain Conditions.

Coseismic ultramylonites: An investigation of nanoscale viscous flow and fault weakening during seismic slip (2019)
Journal Article
Pozzi, G., De Paola, N., Holdsworth, R. E., Bowen, L., Nielsen, S. B., & Dempsey, E. D. (2019). Coseismic ultramylonites: An investigation of nanoscale viscous flow and fault weakening during seismic slip. Earth and Planetary Science Letters, 516, 164-175. https://doi.org/10.1016/j.epsl.2019.03.042

Faults weaken during the propagation of earthquakes due to the onset of thermally-activated mechanisms, which vary depending on the rock type. Recent experimental work suggests that carbonate-hosted faults are lubricated by viscous flow in nano-granu... Read More about Coseismic ultramylonites: An investigation of nanoscale viscous flow and fault weakening during seismic slip.

Mechanical behaviour of fluid-lubricated faults (2019)
Journal Article
Cornelio, C., Spagnuolo, E., Di Toro, G., Nielsen, S., & Violay, M. (2019). Mechanical behaviour of fluid-lubricated faults. Nature Communications, 10, Article 1274. https://doi.org/10.1038/s41467-019-09293-9

Fluids are pervasive in fault zones cutting the Earth's crust; however, the effect of fluid viscosity on fault mechanics is mainly conjectured by theoretical models. We present friction experiments performed on both dry and fluid-permeated silicate a... Read More about Mechanical behaviour of fluid-lubricated faults.

Closed-form equation for subsidence due to fluid production from a cylindrical confined aquifer (2019)
Journal Article
Jayeoba, A., Mathias, S. A., Nielsen, S., Vilarrasa, V., & Bjørnarå, T. I. (2019). Closed-form equation for subsidence due to fluid production from a cylindrical confined aquifer. Journal of Hydrology, 573, 964-969. https://doi.org/10.1016/j.jhydrol.2019.03.041

Ground surface subsidence due to groundwater production is a significant problem. Many attempts have been made to develop analytical models to forecast subsidence rates as a consequence of groundwater production. Previous analytical solutions either... Read More about Closed-form equation for subsidence due to fluid production from a cylindrical confined aquifer.