... of confinement. Axial and radial deformation within each section of intact rock in the specimens were recorded with separate strain gages, and strain gages in these same positions were also attached to intact specimens for comparison. Notable radial strain heterogeneity was observed in the jointed specimens...

.... The criterion of radial-strain gradient, defined as the ratio of change of radial strain and change of time, is generally suitable for any type of rocks. Irrespective of the applied confining pressure, samples were observed to break at almost the same radial-strain gradient for the same type of rocks. Failure...

... to improve the drilling performance in poorly cemented formations. Reservoir Characterization laboratory-scale convergence cmd borehole deformation Wellbore Design borehole deviatoric stress application radial strain wellbore integrity twhc specimen convergence test result borehole wall...

... radial creep and no dilatancy. The radial strain decreased with time suggesting that the cracks parallel to the loading axis are closing. The cracks may well reach the equilibrium state proposed by Costin (1983). He argues that at low strain rates, stress corrosion at crack tips is so low...

... consolidation Stavanger radial strain Upstream Oil & Gas reservoir geomechanics Symposium variation coefficient effective stress contact area constant stress difference axial strain chalk stress difference deformation pore pressure experiment effective stress estimate Biot stress...

... INTRODUCTION ABSTRACT: Radial strain recordings from 24 triaxial tests on sandstone cores had been analysed in order to investigate if dilation could be related to localisation of shear bands. A weak azimuthal anisotropy was observed both in the hydrostatic and in the triaxial stress region...

... coefficient Teufel radial strain application determination shrinkage drilling condition bulk modulus Abousleiman equation poroelasticity permeability RockMechanicfsorIndust AmadeiK, ranzS, cott&Smeallie(eds)¸ 1999BalkemaR, otterdamIS, BN9058090523 Poroviscoelasetifcfectsin...

... cell pressure is computer servocontrolled via a feedback loop that monitors a pressure transducer inside the test cell. Axial and radial strains, pore pressure, axial load and test cell confining pressure data are recorded continuously. machine learning Reservoir Characterization wellbore...

.... Reservoir Characterization reservoir geomechanics Wellbore Design Upstream Oil & Gas cylinder stress rate prediction experiment specimen radial strain MPa creep validity constitutive model formulation borehole closure experiment strain rate constitutive law deformation Borehole...

... formulation Upstream Oil & Gas lignite Thompson primary creep strain deviatoric load deviatoric strain consolidation Texas Lignite volumetric strain test 5 creep test porous silty clay radial strain creep silty CLAY hydrostatic stress axial load deformation CONSOLIDATION AND CREEP...

... deviation variation specimen boundary radial strain relative displacement stress distribution compression cylinder radially end plate uniaxial loading contact boundary Laterally Chapter 7 AN ELASTIC SOLUTION OF THE LATERALLY CONSTRAINED CIRCULAR CYLINDER UNDER UNIAXIAL LOADING by B. T...