... ABSTRACT Many researchers have studied creep of rock to understand its time dependent behavior. However, the periods of only a few tests were greater than a year in previous studies. In this study, a creep testing machine was developed for long-term continuous use. The two long-term creep...

..., although it is thought to have great significance in the long-term prediction of the mechanical behaviors of the reservoir. In this study, we conducted drained triaxial compression creep tests on artificial methane-hydrate-bearing rock samples. A quantitative comparison of the time-dependent characteristic...

... strength characteristic normal stress structural geology stability analysis creep test Indonesia Reservoir Characterization strength long-term shear strength specimen Upstream Oil & Gas criteria long-term strength Claystone coal bearing strata slope failure time dependent behaviour...

... of rock is of great importance. For instance, when considering deep excavations for disposal of high-level radioactive waste in rocks, assessment of the timedependent stability of rock mass under deep geological environment is necessary. With this in mind, creep tests were carried out on Inada granite...

... to the orthotropic case, as Tournemire argillite is naturally anisotropic. The triaxial creep test results on samples at different orientations enabled the parameters of the Tournemire argillite to be identified in terms of orthotropic viscoplastic law. A plane deformation model, using this rheological law...

... " J N.D.CRISTESCU, Department of Aerospace Engineering, Mechanics and Engineering SCience, University of Florida, Gainesville, Fla., USA' . , . ", , ," .. , ABSTRACT: An experimental program aimed at characterizing the variation of the elastic parameters 'in uniaxial short-term creep tests of rock...

... Reservoir Characterization strength loading test compression test yamashita Upstream Oil & Gas axial strain rate fatigue limit failure process stress ratio stress-strain path structural geology fatigue loading creep test specimen loading creep conventional compression test...

... to a characterisation by classical uniaxial creep tests. Indeed, such tests appear to be very unstable, as negligible creep or catastrophic failure may occur for two slightly different loads, chiefly at low confining pressure. For this reason, two tests with more "stable" delayed behavior are proposed herein, namely...

... deformations mechanism. The movement of dislocations can be expressed as dislocation glide or dislocation climb. Reservoir Characterization strength rock salt creep test salt mechanics Artificial Intelligence Congr contribution rheological behavior reservoir geomechanics constitutive...

... rate on the behavior, the evolution of yield strength of the material and the effect of rotation of principal stress directions on the stress-strain curve. The various aspects of the dependence of the creep rate observed during creep tests on the stress history of the rocksalt are also shown to be well...

... csr test prediction creep test Aubertin Reservoir Characterization stress-strain curve strain-time curve inelastic flow constant strain rate test triaxial compression test essais rocksalt unified viscoplastic model MPa strain rate Upstream Oil & Gas Proc laboratory...

... ABSTRACT: Improper water flooding may increase the water content and the rate of steady-state creep of the shale formations. Based on the data of triaxial creep test, two nonlinear rheological models are recommended for the shales. To calculate the time-dependent formation load on the oil well...

... the purpose it was conceived for. It is necessary to carry out several types of test on the same rock, in order to get a better knowledge of the model. Due to great difficulty in obtaining rheologic constants, it seems that the most appropriate tests for determining those constants are creep tests...

... Upstream Oil & Gas point defect creep test experimental result gabbro viscosity Nabarro poise defect secondary creep strain rate center-loaded beam experiment kumagai granite maxwell liquid unloaded beam crust creep grigg herring SYNOPSIS: Nabarro (1948) pointed...

... by pressurizing unlined underground cavities (Passaris, 1979) and boreholes (Nelson and Kocherhans, 1981). Reservoir Characterization Proc Conf evaluation strength Ladanyi borehole dilatometer test reservoir geomechanics rock salt creep test determination creep stage Hansen creep property...