... and breakout length, indicating a potential use of these breakouts as stress magnitude indicators. The average breakout width in all the tests is constant regardless of the far-field stress conditions, suggesting that this is a material property related to the lower porosity narrow band developed ahead...

... of wave energy. The degree of absorption is applied to calculating the material's physical properties such as density, porosity, and also the material's shear strength values at varying depths in terms of cohesion and internal friction angle. Dielectric permittivity is also used to calculate the moisture...

... progresses, porosity increases and in turn degrades the material strength. Strength degradation leads to an increased propensity for plastic shear failure that further magnifies the erosion activity. An escalation of plastic shear deformations will inevitably lead to instability with the complete erosion...

...: Fragments of a number of core plugs have been analysed using a high resolution X-ray micro-computed tomography (micro-CT) facility at resolutions down to 2 µm. The samples analysed include a range of sandstone samples and one reservoir carbonate core. We show that data over a range of porosity can...

... Wilmington sand porosity viscoplasticity deformation 1. INTRODUCTION Inelastic porosity loss and its associated compaction and subsidence is commonly observed in unconsolidated sand and shale and weakly consolidated chalk reservoirs during production. A classic example of this is the Ekofisk field...

... compression tests. As strain rate can also be expressed as a function of production rate, the static DARS can now be extended into a dynamic formalism that predicts the change in physical properties such as porosity reduction, permeability reduction and changes in rock properties associated with production. 1...

... reservoir geomechanics Simulation Upstream Oil & Gas Reservoir Characterization strength cohesion sandstone determination petrophysical property crack length porosity compressive strength Jackfork sandstone experimental determination hydraulic fracturing international society...

... US government Reservoir Characterization reservoir geomechanics Fluid Dynamics GeoModel microcrack porosity application Upstream Oil & Gas strength triaxial compression compression test invariant compaction pore collapse Wellbore Design limit surface elasticity stress state...

... complex reservoir aperture hydraulic fracturing fracture pattern cementation porosity Simulation fracture network fracture characterization modeling Laubach permeability lander Olson quartz cementation Reservoir Characterization sandstone fracture Upstream Oil & Gas...

... Upstream Oil & Gas porosity Reservoir Characterization Fluid Dynamics fluid pressure MPa specific storage effective stress law rock sample flow in porous media effective pressure sandstone Tennessee Sandstone Artificial Intelligence pore pressure deformation permeability...

.... However, in the geomechanics and petroleum literature, the permeability change of reservoir formation subjected to deformation changes is usually assumed as a function of porosity or volumetric strain, which is a scalar variable. Thus, the changes in permeability are equal in all directions even though...

... Reservoir Characterization experimental observation shale SINTEF Petroleum Research stiffness s-wave velocity frequency free water Velocity Dispersion rock physics model physics model Upstream Oil & Gas transition porosity shear moduli clay mineral experiment dispersion...

... Reservoir Characterization aperture crack density Fluid Dynamics intensifier flow in porous media quartz Westerly granite permeability evolution porosity granite permeability connectivity grain boundary Upstream Oil & Gas pore pressure basalt Heat Treatment Temperature...

... and the Central Graben area and more southern parts of the North Sea. drilling fluid selection and formulation drilling fluid property drilling fluid formulation closure rate porosity closure constitutive behavior drilling fluid chemistry drilling fluids and materials OBM salt drilling salt...

... Reservoir Characterization wellbore integrity Upstream Oil & Gas plasticity compaction lochaline sand axial stress unconsolidated sand reservoir geomechanics Fluid Dynamics strength porosity Wellbore Design compressibility pore collapse stress path effective stress onset...

... Fjrer porosity weak sandstone Reservoir Characterization Rock mechanics sandstone Poisson Upstream Oil & Gas relocation dynamic moduli loading dynamic poisson relation axial strain radial strain increment dilatancy static poisson deformation hold period ABSTRACT...

...) Friction angle of sample (degree) Cohesion of sample (MPa) Dilation angle of sample (degree) Tensile strength of sample '(MPa) Porosity of sample Penneability of sample «m/secPalm» Bulk modulus of fluid (GPa) Density of fluid (kg/m3) Nonna! stiffness of interface (Palm) Shear stiffness of interface (Palm...

... mass modulus values to rock mass porosity values. Surface refraction seismic measurements are used to estimate rock mass low strain modulus values. Recovered rock core unconfined compressive strengths are used to estimate rock particle modulus values, and unit weights are used to estimate corresponding...

... experiments. An increase in grain damage is associated with an increase in stress level. Grains in dry samples are extremely and irregularly fragmented and show extensively reduced porosity, while less grain damage and higher porosity are observed in saturated samples. Pore fluid mitigates the interaction...

... Reservoir Characterization Fluid Dynamics porosity flow in porous media modeling dual porosity matrix University Upstream Oil & Gas fractured porous medium fluid flow Oklahoma saturation oil and gas permeability multiphase flow pore pressure initial oil saturation fracture...