... 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...

... creep creep test axis tunnel inelastic volumetric strain longitudinal wave velocity ABSTRACT The use of underground facilities such as waste reservoirs and power station caverns is increasing. The excavation of underground openings results in a change in stress distribution which may lead...

... 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...

... ABSTRACT: An experimental program aimed at characterizing the variation of the elastic parameters in uniaxial short-term creep tests of rock salt has been performed. The experimental technique used is based on the measurement of the travel time of the longitudinal and shearing, elastic waves...

... 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...

... Reservoir Characterization strength rock salt creep test salt mechanics Artificial Intelligence Congr contribution rheological behavior reservoir geomechanics constitutive equation aachen 1991 workshop 5 Upstream Oil & Gas Rock mechanics stress state creep equation Hunsche...

... 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 rock salt are also shown to be well modeled...

... variables, which induce isotropic and kinematic hardening, For rocksalt, it is shown that the proposed model makes satisfactory predictions of stress-strain curves for constant strain rate and constant rate of stress tests, and of strain-time curves for creep tests. Resume Cet article permet de valider...

... 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...

... 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...

... 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...