...-prager criterion linear drucker-prager criterion mesh density reservoir geomechanics criterion strength drucker-prager criteria hyperbolic dp criterion cement property geological subdiscipline criteria interface cement sheath integrity rock mechanic geomechanics symposium cement stone dp...

... stress that led to the development of the measured breakout. Most commonly, Mohr-Coulomb failure criterion is used which disregards the influence of intermediate stress on strength. Different polyaxial criteria have been proposed to include this effect. Here, we first review selected polyaxial criteria...

... was studied based on the full stress-strain curve observed in the synthetic sandstone. Also, the synthetic rockburst-susceptible rock suitability is evaluated using several empirical criteria, such as strength brittleness index, burst energy coefficients, a brittleness index modified, and a strain energy...

...) compression, axisymmetric (conventional triaxial) extension, and multiaxial strength tests. The data are fitted to linear and nonlinear failure criteria: Paul-Mohr-Coulomb (PMC), a generalized linear criterion containing all three principal stresses; Hoek-Brown, a popular nonlinear criterion containing major...

... ABSTRACT: In Japan, the determination of support patterns (CI, CII, DI, DII) in NATM tunnels plays an important role in the construction of mountain tunnels. Conventional methods of rock mass evaluation include grading the rock by experienced experts with a point-based system in 9 criteria...

... discontinuities were numerically designed. The mechanical performance of these discontinuities was initially assessed using published failure criteria that depend on the properties of the rock and the discontinuity morphology obtained by visual and 3D image analysis. Finally, triaxial direct shear tests under...

... characterization criteria boualam onepetro candidate selection system table fiscret software ARMA 22 320 A Screening Methodology Using Fuzzy Logic to Improve the Well Stimulation Candidate Selection Mouedden, N., Laalam, A., Rabiei, M., Merzoug, A., Ouadi, H., Boualam, A., Djezzar, S. University of North...

... hydraulic fracturing reservoir characterization papanastasiou upstream oil & gas experiment wellbore design reservoir geomechanics sandstone injection experiment specimen microbially biscontin strength wellbore integrity konstantinou criterion criteria carbonate...

... drag induced tensile failure sanding criteria and/or plastic failure sanding criteria have been incorporated into various numerical sanding prediction models (Vaziri et al., 1986, 1997, 2003; Morita et al.,1989; Hoek et al., 1996; among others). These models are more versatile in dealing...

...% is selected as the strength to discussed. Different strength criteria are compared to analyze the strength of rock salt, the result shows that the Hoek-Brown criterion has a good fit effect. The Hoek-Brown model is used in FLAC3D to simulate the triaxial strain hardening of rock salt with mudstone...

..., but the influence of different rock failure criteria on the calculation results has always been neglected. Therefore, according to the linear poroelastic mechanics theory and different failure criteria of rock, the maximum horizontal stress in southwest Sichuan of China is calculated using the wellbore breakout...

... the stresses at the material boundaries are calculated. For FEM, a commercially available software (COMSOL) is used to perform the stress analysis by specifying the initial stress condition in a 3D inclined well system. Failure criteria are discussed to estimate when a component of the well system might fail...

... criteria external stress stress state breakout magnitude ABSTRACT: To accurately assess rock behavior in the deep subsurface, it is necessary to measure the in situ stress directions and magnitudes. The current methods for measuring the in situ stress state in the deep subsurface primarily...

...-horizontal caverns and establish the universal similarity criteria controlling the creep of the cavern. The WIPP-Drucker model is investigated. The mechanical properties of the formation generally follow the geo data from Pingding Mountain. The creep simulation is performed over a period of 30 years under...

...? To answer this question, the Longmaxi shale rock was collected from the Silurian formation in Sichuan Basin of China, the specimens were cored with different angles (0°, 15°, 30°, 45°, 60°, 75°, and 90°), then, the triaxial compression tests were conducted. Five most commonly used criteria, such as the SPW...

... as the need to support the weight of the overburden strata up to the ground surface (Esterhuizen et al., 2011.) metals & mining pillar strength upstream oil & gas displacement reservoir characterization support reaction curve equilibrium point criteria convergence src correspond...

... ABSTRACT: The accurate prediction of cement failure is significant to maintain wellbore integrity. In the downhole situations, the failure criteria widely used for rock are not guaranteed to be suitable for cement. Till now, seldom researchers have paid attention to the right choice...

... criteria. It was discovered that breakout width stabilization is governed by equivalent plastic shear strain threshold whilst breakout depth stabilization is governed by equivalent plastic shear strain and volumetric strain thresholds. “First-of-its-kind” correlations for shales were subsequently developed...

... during steam-breakthrough emulation (three-phase flow). Wire-wrapped screens exhibited an excellent flow performance due to the high open-to-Flow Area (OFA). Existing criteria provide reasonable aperture sizes, especially for finer sands and challenging conditions such as steaminflux. However...

... in the geomechanical model to determine the conductivity of the natural fractures in the shale play. Reservoir Characterization Wellbore Design natural fracture Shale interval inversion wellbore integrity reservoir geomechanics criteria stiffness constant well 1 MPSI Upstream Oil & Gas regime...