... a continuous stress sequence from sonic logs. These methods usually require some ‘horizontal tectonic stress’ correction for calibration and rarely match sections characterized by stress profiling due to viscoelastic stress relaxation. Recently, several studies have tried to predict the stress profile...

... structure can continue to generate seismicity regardless of the current operational status. It is therefore important to distinguish between ongoing ‘relaxation’ activity associated with a return to geomechanical equilibrium versus continued seismicity associated with ongoing activation and additional...

... ABSTRACT: General adaptability of viscoelastic stress relaxation from laboratory time-dependent deformation (creep) measurement to derive the least principal stress S hmin magnitudes at depths in sedimentary rocks is proposed. It is based upon a simple viscous rheological model and steady...

... related to the evolution of microcracks and in this study, we focused on the micromechanics of the fractures produced in crystalline rocks under time-dependent loading conditions. Stress relaxation experiments were conducted on double-flawed prismatic Barre granite specimen in the laboratory...

... also plays an important role in our country’s energy development. complex reservoir reservoir characterization saturation structural geology shale pore upstream oil & gas shale gas sandstone porosity research characteristic journal university china university relaxation...

... ABSTRACT: The disturbance factor (D) is a parameter in the Generalized Hoek-Brown failure criterion for rock slopes in slope stability. It represents the subsurface damage to the rock material properties resulting from blasting and stress relaxation during excavations. Within the region...

... ABSTRACT: Stress relaxation tests on brittle rocks have shown that the stress drop associated with the relaxation period is related to the propagation of internal cracks but the fracturing processes that occur when the stress is relaxed is not well understood and requires further investigation...

... in assessing the impact of staged fracturing on cement sheath integrity. Artificial Intelligence Upstream Oil & Gas shale gas casing and cementing Engineering cyclic loading test integrity representative section peak deviatoric stress Petroleum Science relaxation pore size distribution...

... not instantaneous, but typically occur gradually as a pressure front advances through the reservoir and caprock formations, understanding the relationship between pore pressure change and time-dependent deformation is important. This paper describes the results of load relaxation tests with durations of two hours...

... Abstract Excavation of a large pit is performed in stages, which subjects the rock mass to several changes in stress conditions during the life of the mine. If the influence of stress relaxation in strength is not evaluated properly results of the analysis will not be accurate. Analysis...

... ABSTRACT: Relaxation impression technique is a novel relaxation test in which a cylindrical flat ended indenter penetrates into a small region of sample and after keeping the displacement at a certain point, the decrease in the stress level will be recorded. Conventional relaxation test...

... ABSTRACT We use elastoplastic geomechanical models (Modified Cam Clay) to predict how stresses and pore pressures evolve in mudstones bounding a salt body. We show that the loading caused by visco-elastic salt relaxation processes can induce pore pressure perturbations that extend kilometers...

... dilution stability footwall relaxation zone ore dilution operation rock mass stope height longitudinal mining reservoir geomechanics unplanned ore dilution strike length overbreak stope strike length failure criterion relaxation sequence stope mined ARMA 10-392 Examining the influence...

... of spheres. Reservoir Characterization Upstream Oil & Gas equivalent continuum modeling Wellbore Design Simulation deviatoric stress relaxation fraction relaxation loading reservoir geomechanics aperture numerical simulation shear slip wave propagation wellbore integrity strength...

... Oil & Gas rock fragment strength cyclic loading residual strain energy energy consumption strain energy loading-unloading cycle relaxation specimen operation reduction loading preliminary study total strain energy mining stress level stress-strain curve deformation...

... ABSTRACT: The rheological behavior of salt rock is studied by both uniaxial and triaxial relaxation tests. In order to investigate the relaxation behavior of salt rock, stepwise relaxation tests were performed after the sample had been subjected to different pre-relaxation creep strains...

... strain of the sample as it continues to recover (or relax) from its in situ state of stress. Determination of stress information from ASR data requires a model of the relaxation process and two such models have been proposed: the Direct Model [ 1] and the Sandia Model [2]. The authors of [1, 2] claim...

... housing unit for the LVDTs. Reservoir Characterization reservoir geomechanics enhanced recovery hydraulic fracturing Upstream Oil & Gas gas cycling diametral displacement LVDT displacement wall thickness relaxation site investigation instrument pressure transducer hybrid borehole...

... in all of the cores and acoustic emissions were always detected during recovery. The acoustic emission rate decreased exponentially with time, similar to the strain relaxation behavior of the cores, and acoustic emission activity ceased when strain relaxation no longer occurred. The cumulative number...

... Characterization reservoir geomechanics hydraulic fracturing Upstream Oil & Gas orientation Rock mechanics fracture direction correlation relaxation residual strain determination axis fracture orientation hydraulic fracture stress field fracture fabric element Fracture Anisotropy strain...