...; Ma and Haimson, 2016; Lee and Haimson, 2011). Therefore, several polyaxial failure criteria which include the σ 2 dependence of strength has been proposed and applied in borehole breakout analyses (Zhou, 1994; Ewy, 1999; Al-Ajmi and Zimmerman, 2005; Chang et al., 2010). united states...

... geomechanics failure criteria confinement Engineering Rock mechanics Upstream Oil & Gas criterion international journal Reservoir Characterization strength Mining Science boundary shear strength Byerlee Mogi leakage Hoek low confinement failure envelope fracture ARMA 19 1873 New...

... principal stress anisotropic formation Upstream Oil & Gas stability analysis mohr-coulomb criterion intermediate principal stress failure criteria failure criterion shear failure Zimmerman criterion mud weight plane bedding plane anisotropy ARMA 19 2178 The Implications of using...

... Upstream Oil & Gas failure criteria variation Chen equation plastic region Wellbore Design mogi-coulomb failure criterion Rock mechanics wellbore pressure Abousleiman wellbore integrity wellbore stability analysis stability analysis elastic region Zimmerman deformation ARMA 19 91...

... 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...

.... Failure criteria known as Mogi-Coulomb was used to determine an operating mud weight window required for safe drilling. The accuracy of the geomechanical model was examined by comparing predicted wellbore instability with the actual wellbore failure shown on caliper logs at a given mud weight...

... for determination of the volume of collapse during drilling is presented based on changes in the geometry of boreholes. The approach can be used in conjunction with different failure criteria to estimate the collapse onset in the presence of formation strengths and principal stresses. The study highlighted how...

..., knowledge of the collapse volume provides better estimates on the required mud and cement volumes. Reservoir Characterization Upstream Oil & Gas Caliper Log reservoir geomechanics failure criteria failure criterion wellbore integrity criterion Zoback breakout Drilling alkamil breakout...

... failure criteria reservoir geomechanics BAAR Reservoir Characterization Upstream Oil & Gas criterion borehole anisotropic rock wellbore integrity normal stress regime criteria MPa stress distribution rock medium elastic parameter borehole wall borehole stability stability analysis...

... ABSTRACT: Failure data from compression and extension testing of Dunnville sandstone and Webatuck dolomite were analyzed using three different criteria: Mohr-Coulomb, Hoek-Brown, and Paul-Mohr-Coulomb. An emphasis was placed on the details of the failure criteria under tensile-compressive...

... volume. reservoir geomechanics Upstream Oil & Gas borehole breakout alkamil Reservoir Characterization Wellbore Design different failure criteria mud pressure drilling operation failure criteria failure criterion wellbore integrity breakout University MPa collapse failure...

...-dimensional failure criteria. The results show that the proposed estimated method using GPR modelling approach is a promising and reliable tool for estimating the strength of intact rocks. reservoir geomechanics GPR concentration Reservoir Characterization Engineering criterion Artificial...

... failure criteria dilation angle porosity mc failure upstream oil & gas fracture permeability injection pressure injection rate cohesion ARMA 15-0680 Thermal-Hydrological-Mechanical Modelling of Shear Stimulation at Newberry Volcano, Oregon Smith, J. Torquil and Sonnenthal, Eric L. Lawrence...

... in drilling fluid design and address wellbore stability issues in troublesome shale formations. wellbore integrity failure criteria water activity Wellbore Design adsorption isotherm moisture content Reservoir Characterization wellbore stability criterion shale compressive strength...

... Abstract Transition of a failure mechanism from extensional to shear dominated failure with increasing confinement is widely observed in the rupture of samples in the laboratory and in situ associated with underground excavation in brittle failing rocks. However, common failure criteria...

... Abstract Selection of the appropriate rock failure criteria is one of the key steps in determining minimum drilling fluid density in wellbore stability analysis. Numerous failure criteria have been used for rock failure analysis but there is no common agreement of which failure criterion...

... damage strain limits are 0 - 0.17 %. predict brittle failure damage-controlled test cohesion stress increment Upstream Oil & Gas friction reservoir geomechanics brittle failure experiment Rock Mech failure criteria friction angle Martin numerical simulation Reservoir...

... of intermediate stress and gives good matches to the formation failure envelopes predicted by the numerical model. Artificial Intelligence Reservoir Characterization reservoir geomechanics drawdown criteria depletion effective stress stress anisotropy hole failure failure criteria prediction mc...

... ABSTRACT: This project determines the indirect tensile strength of lithophysal analog rock and presents possible failure criteria. The analog rock was made from Hydro-Stone TB cement and has mechanical properties similar to the estimated rock mass mechanical properties of welded...

... of these different failure mechanisms. The insight gained provides an ability to not only predict failure, but the mechanism through which it occurs. Reservoir Characterization failure criteria mechanism instability cam-clay material model material model cylinder mean effective stress runaway...