..., and decline with distance to the wells. reservoir characterization subsurface storage climate change modeling & simulation reservoir geomechanics reservoir simulation cap rock co 2 upstream oil & gas caprock mean stress potential leakage injection shear strain plane coupling...

... 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...

... stress geomechanical model salt sheet shear reservoir geomechanics pore pressure Upstream Oil & Gas Mean stress prediction porosity emplacement loading sedimentation stress state workflow overpressure pressure prediction deposition horizon compression mean effective stress...

... that there was good agreement (within 7°) between the experimental results and theoretical predictions. flow in porous media strength Reservoir Characterization Fluid Dynamics reservoir geomechanics shear band waste management Upstream Oil & Gas Mean stress constant lode angle minimum stress...

... is the shear stress intercept on a Mohr plane known as cohesion. PMC and MC are approximations to the observed failure response, which exhibits a nonlinear variation of strength with mean stress P = ( s 1 +s 2 +s 3 )/3, although PMC contains the intermediate principal stress s II , which for many rock...

... of the geologic environment, and accounts for shear-induced pore pressures. We demonstrate this new workflow using data from the Mad Dog field, in the Gulf of Mexico. We use a static geomechanical model to obtain total mean stress and shear stress values around the Mad Dog salt. We use measured data along a well...

... properties of ceramic proppant, the formation sandstone and sand screen. The frictional hardening properties of the ceramic proppant and sandstone core plugs are measured by performing constant mean-stress tests in rock mechanics laboratory. The volumetric hardening curve of sandstone is measured...

... Abstract A laboratory testing program was developed to examine the short-term mechanical and time-dependent (creep) behavior of salt from the Bayou Choctaw Salt Dome. Core was tested under creep and quasi-static constant mean stress axisymmetric compression, and constant mean stress...

... compatibility reservoir geomechanics Production Chemistry rock/fluid interaction Mean stress specimen saturation Sequestration calcarenite compression experiment pore pressure Makhnenko effective mean stress formation damage subsurface storage labuz limestone poroelastic parameter p-wave...

..., and the comparison matched closely for the nondilational loading segment. reservoir geomechanics sustainability Reservoir Characterization sustainable development natural gas storage Upstream Oil & Gas axial stress Mean stress cyclic creep test cyclic test volumetric strain Lode angle social...

... Abstract: The stress and pore pressure dependence of permeability of shale gas rock is considered for the case of two-solid constituents porous medium. It is done for a generalized model of composite sphere phases each of them being gas/fluid saturated. It is shown that the total mean stress...

... compression (s 2 = s 3 ) to axisymmetric extension (s 2 = s 1 ). Tests reveal the effect of mean stress (s oct ) and deviatoric stress state parameter ( N ) on failure and failure-plane angle. Regardless of N selected, the octahedral shear stress s oct at failure rises with increasing s oct s reaches...

... localization features were found in a suite of constant mean stress true triaxial tests. Tests were run at five different stress states ranging from axisymmetric compression to axisymmetric extension at five constant mean stresses ranging from 30 to 150 MPa. Most of the specimens that formed compaction...

... constituent hydrostatic stress deformation Reservoir Characterization reservoir geomechanics Upstream Oil & Gas pore pressure Fluid Dynamics organic content Mean stress effective stress coefficient poroelastic effect undrained test stiffness composition application tight shale initial...

... of cements. 6000 7000 8000 9000 10000 11000 12000 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 Mean Stress (psi) Ve lo ci ty (ft /s ec ) 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 Mean Stress (psi) Ve lo c ity (ft /s e c ) 1.50 1.70 1.90 2.10 2.30...

... coefficient). The parameter which describes the relationship between the three principal stresses is NII = ( 2 where = ( 1 + 2 + 3)/3 is the mean stress and 1, 2, and 3 are the principal stresses. The Mises equivalent shear stress is = (J2)1/2. In terms of principal stresses, = 1 2)2 + ( 2...

... can be very significant under undrained condition. Usually, the pore pressure variation in response to volumetric deformation is analyzed within the framework of isotropic linear poroelasticity. As a result, a pore pressure change is predicted only by changes in the mean stress. However, as shown...

... flow in porous media regime compaction permeability-porosity relationship Fluid Dynamics stress contour porous sandstone sandstone iso-permeability stress contour Upstream Oil & Gas Mean stress cataclastic flow contour porosity permeability cumulative damage model...

... results, using a bifurcation approach to localization, suggest that compaction band formation requires both a specific relationship between the principal stresses, and a loading history that produces a favorable mean stress. The most favorable compaction band conditions occur when: 1) the intermediate...

... is represented by the three invariants, I1 (representing mean stress), J2 (representing shear stress), and ø (a convenient alternative to J3 , also known as Lode angle). The Lode angle describes the magnitude of the intermediate principal stress with respect to the maximum and minimum principal stress values...