...). drillstring design 13th international congress crack growth peak stress Reservoir Characterization reservoir geomechanics Upstream Oil & Gas axial stress crack initiation stress investigation equation drill pipe selection crack length stress state brittle rock creep failure time rock...

... in strength or modulus was found. The above research results are inconsistent and it indicates the complexity of the mechanical properties of natural joints. strength Beishan Granite Reservoir Characterization 13th international congress Upstream Oil & Gas Wang waste management axial stress...

... to be applicable. The conclusions drawn in this paper can serve as a reference for stability analysis and reinforcement treatment of other similar projects. Reservoir Characterization axial stress variation rock mass prestress Engineering inner anchor segment inner-anchor segment anchor prestress...

... ABSTRACT Poroelastic and hydraulic parameters of sedimentary rocks were estimated simultaneously from triaxial compression tests with instantaneous change of axial stress, confining pressure, or pore pressure. In terms of hydraulic constants, those from triaxial tests agreed well with those...

... Rock mechanics plane hydraulic fracturing axial stress characterisation Artificial Intelligence Upstream Oil & Gas sample plane area Reservoir Characterization fracture characterization variability FracMan loading fracture initial fracture geometry fracture radius sample plane...

... tessellation Hoek axial stress mechanics Steen representation average axial stress Thomas, S., Napier, J.A.L., Lilly, P., Confinement dependence on cohesion weakening ISRM 2003 Technology roadmap for rock mechanics, South African Institute of Mining and Metallurgy, 2003. Confinement dependence...

... & Gas potential response substance experimental study seismic electric signal axial stress variation electric potential loading hydraulic fracturing electric potential response electrical potential potential development AE count geomaterial deformation University Aydan, Ö...

.... Upstream Oil & Gas cylindrical rock sample radial stress strain tensor rock sample Reservoir Characterization axial stress closed-form solution initial strain tensor tangential stress strength incompatibility tensor tensor reference state structural geology residual stress displacement...

... and Villaescusa 2 cores sampled from depth 70 days previously still displayed the effect. Upstream Oil & Gas Rock mechanics axial strain axial stress calibration test porosimetry Reservoir Characterization microcrack inflection point specimen loading numerical model lrr test Felicity...

... Abstract Triaxial tests were conducted on the schist specimens with various anisotropic angles under confining pressures of 0, 7 and 15 MPa, and axial stress-axial strains, were measured and plotted for various conditions. The results obtained reveal the effects of schistose on the strength...

... underground structure numerical analysis reservoir geomechanics stereographic projection 3-dimensional absolute displacement Reservoir Characterization Upstream Oil & Gas displacement Wellbore Design axial stress absolute displacement tunnel face prediction Crown tunnel axis tunnel...

... to investigate flow deformation characteristics for different stress conditions. Intact and jointed granite rock specimens with multiple cracks were tested under two different permeating fluids (air and water), using a high-pressure triaxial equipment. Effects of confining stress and axial stress on flow...

...). They showed the development of high velocity zones during the application of the stress reflecting crack/pore closure. Berea sandstone mechanism threshold Reservoir Characterization axial stress stress-induced damage stiffness reservoir geomechanics lateral stiffness initiation boundary...

... in this article. All samples were aged at 50 bars for one week. The specially designed creep cell was self-contained with a built in piston to apply axial force on the specimen. Reservoir Characterization drilling fluids and materials Load Step axial strain Wellbore Design specimen axial stress...

... stress and temperature, using uniaxial and conventional triaxial compression (CTC) tests. Reservoir Characterization axial stress specimen creep stage creep response deviatoric stress path dependance stress path Upstream Oil & Gas stress state creep property reservoir geomechanics...

... ABSTRACT: In many existing elastoplastic plane strain solutions for a circular tunnel excavated in a homogeneous, isotropic rock mass under a hydrostatic stress field, the longitudinal axial stress (or the out-of-plane stress) σ z is not correctly evaluated. The paper describes the concepts...

.... This procedure also provide the classical mechanical parameters in addition to the creep characteristics. SAMPLES AND EQUIPMENT The porosities of the tested chalks (outcrop and North Sea chalks). Wellbore Design consolidation uniaxial test structural geology wellbore integrity axial stress...

... strain analysis with the axisymmetric 3-D analysis of a multi-step excavation process. Upstream Oil & Gas model overestimate mesh boundary SCF tunnel axial stress failure zone stress concentration factor tunnel roof reservoir geomechanics shaft-tunnel-tunnel intersection...

... stress level. Secondly, for buckling to occur, the slabs which are separated by joints have to be subjected to axial stresses which are high compared to the mechanical strength of the respective rock. Buckling failure is most commonly reported from layered coal deposits, where very low friction materials...

... stress state pollock 1979 Reservoir Characterization reservoir geomechanics acoustic emission new-experience range Kaiser effect crawford 1986 principal stress axial stress strength recollection minor principal stress specimen deviatoric stress stress field Kaiser Effect point hughson...