..., and decline with distance to the wells. reservoir characterization reservoir geomechanics subsurface storage reservoir simulation cap rock caprock co 2 fault cell shear strain climate change plane modeling & simulation enhanced recovery upstream oil & gas mean stress wellbore...

... 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 direction Haimson shear band failure feature band angle intermediate principal stress localization criterion Mean stress constant lode angle minimum stress intermediate stress granite principal stress ARMA 17-0072 Bifurcation theory applied to granite under general states of stress...

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

... 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...

... 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...

... 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...

... 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...

... structural geology co 2 Mean stress coefficient specimen possible host rock saturation Production Chemistry rock/fluid interaction Reservoir Characterization pore pressure Makhnenko effective mean stress oilfield chemistry fluid compatibility Sequestration dissolution p-wave velocity labuz...

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

... 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...

... ABSTRACT: Features similar in size, appearance and orientation to previously reported compaction 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...

... rock and the effective stress acting on the rock matrix. This coupled effect is known as the poro-elastic effect and can be of significant and long-term importance for nano-darcy permeability rocks. reservoir geomechanics Fluid Dynamics Mean stress flow in porous media compressibility...

.... There is obviously more to the story. reservoir geomechanics compressibility correlation shear velocity Upstream Oil & Gas curvature Reservoir Characterization insitu stress prediction GOM Wellbore Design cross plot rock property compressional velocity regression Mean stress porosity...

... of deformation bands in Castlegate sandstone. Mean stresses for these tests range from 30 to 150 MPa, covering brittle to ductile behavior. Deformation band orientations are measured with external observation as well as through acoustic emission locations. Results of experiments conducted at Lode angles of 30...

... MPa. For Berea SS, the pore pressure responded to confining pressure (also mean stress because there was no differential loading) in the usual manner corresponding to ?p=B?sm, with B ranging from 0.3 to 0.55. Similarly, for Indiana limestone, B was measured to be 0.15 to 0.46. On the other hand, when...

... 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...

... 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 principal stress is equal...

... 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...