... deviatoric stress hydraulic fracturing breakdown natural fracture cylinder surface hydraulic fracture fracture slippage cylinder experiment fracture propagation Upstream Oil & Gas Ghassemi interaction injection pressure strain gauge discontinuity propagation wellbore 1. INTRODUCTION...

... as well as creep deformation. shale gas complex reservoir structural geology porous clay matrix composition Shale Rock modeling international journal Shen matrix creep deformation Shao axial strain deviatoric stress elastic property Microstructure Reservoir Characterization...

... ABSTRACT: Steady state creep rate of rock salt often is described through the Norton-Hoff (NH) law. Recent experimental results suggest that this law must be modified in the low deviatoric stress range. It is suggested to adopt, instead of a linear law, a step-wise linear law in the (Equation...

... micrometer. Calibration results showed that the performance of the CMD and the digital micrometer matched with high accuracy. TWHC test results showed that an increase in the cement content resulted in an increase in the deviatoric stress required to initiate a borehole convergence. Moreover, it was observed...

.... When shear failure happens, the stress state will fulfill the yield criterion immediately. Later in the creep process, the deviatoric stress will be constant if the boundary condition does not change, then the steady state creep will increase infinitely. Fig. 1. Burgers viscoelastic-plastic rheological...

..., elevated pore pressure and temperature conditions. Reservoir Characterization structural geology pore pressure wellbore integrity osmosis shale deviatoric stress Wellbore Design axial stress stress state reservoir geomechanics Upstream Oil & Gas failure criterion geomechanical...

.... Reservoir Characterization volumetric strain Miyazaki mechanical property flow assurance Simulation particle MPa constitutive model hydrate saturation Upstream Oil & Gas hydrate sand strength hydrate particle nonlinear constitutive model triaxial test hydrate deviatoric stress contact...

... ABSTRACT: In Biot's theory of isotropic poroelasticity, deviatoric stress does not induce pore pressure as the mean stress is the solely factor responsible for such changes. However, for an anisotropic rock the deviatoric stress can induce an undrained pore pressure change, a consequence...

... ABSTRACT: Rock salt exhibits a strain and time dependent response under deviatoric stresses. The practical implications of this creeping behavior have been studied extensively for the design of underground excavations. Advanced constitutive models combined with modern computing capabilities...

... geomechanics volumetric strain axial strain Reservoir Characterization irrecoverable strain AE event Symposium Upstream Oil & Gas acoustic emission deviatoric stress Wellbore Design tangent strain ratio cumulative ae event millistrain PPD positive dilatancy triaxial test maximum...

... stress. The first case shows that confining stress more heavily impacts dynamic mechanical properties than static. The effect is most prominent at high deviatoric stresses, where stress-induced damage increases the difference between dynamic and static Young’s moduli. The second case shows that samples...

... hydraulic fracturing peak deviatoric stress deviatoric stress Upstream Oil & Gas normal stress MPa epoxy configuration sandstone sample rock sample geomechanical property shear stress mudstone sample reservoir geomechanics strength maximum shear stress plastic deformation shear strength...

... to the bedding. Artificial Intelligence Manco PAB bedding machine learning Manco PEB complex reservoir creep deformation creep test MPa creep behavior Reservoir Characterization Upstream Oil & Gas shale gas deviatoric creep deviatoric stress creep strain rate steady-state strain rate...

... is then to determine which mud weight to use to prevent borehole closure. Reservoir Characterization drilling fluid formulation drilling fluid chemistry drilling fluids and materials Barker viscosity dependency drilling fluid property characteristic viscosity deviatoric stress assumption creep...

.... The influence of deviatoric stress, confining pressure, and temperature on secondary creep rate was evaluated based on these recent test data. Because the individual test conditions were originally designed to meet the specific needs of each project, the test conditions for the creep tests varied. The study...

... stress ratio (q/s' m ): critical state region, transition region, and geostatic compression region. We built these large strain models with Elfen; we model the sediments as poroelasto-plastic materials with a critical state soil model (SR3). Overall, we predict porosity, mean and deviatoric stresses...

... a deviatoric compression test for either of these orientations). Reservoir Characterization orientation Upstream Oil & Gas shale reservoir geomechanics GPa Utica Shale moduli anisotropy dynamic measurement deviatoric stress gauge axis hydrostatic pressure plug Poisson bedding plane...

... to axial stress using a constant radial stress boundary condition (Static and dynamic). c. Poisson's ratio, the negative ratio of the change in radial strain to the change in axial strain (Static and dynamic). tri-axial test static data deviatoric stress structural geology volumetric strain...

..., with additives for expanding cement, is considerably higher than conventional cements and so there is a need to quantify the necessary cement properties to suit specific well-conditions. material model reservoir characterization deformation deviatoric stress nonlinear stress analysis failure mode...

... deviatoric stress at a suggested constant axial strain rate until the sample reaches its failure point typically referred to Maximum Compressive Strength (MCS) value. It is typical to use one or multiple LVDT s for axial strain measurement and a cantilever bridge (four strain gauges mounted on single ended...