... ABSTRACT: Hydrogen-based solutions are gaining importance as a renewable clean energy source. A geomechanical challenge when hydrogen storage in salt caverns is considered is the cyclic loading and unloading of the host rock (rocksalt). As hydrogen is stored and removed based on fluctuating...

.... In this study, uniaxial compression tests and cyclic loading mechanical experiments are conducted on sandstone samples from M gas storage in Junggar Basin. These experiments combined with the operational data of M gas storage investigate the influence of different frequencies and amplitudes by stress-strain...

... of rocks in PHF is crucial for optimizing fracturing construction parameters. In this paper, a series of fatigue fracture toughness experiments including monotonic loading, constant amplitude with constant mean stress(CACMS) cyclic loading and constant amplitude with increasing mean stress(CAIMS) cyclic...

... ABSTRACT: Understanding wave behaviors across rocks exposed to cyclic loads is of great significance to the communities of geomechanics and geophysics. This study aims to investigate the elastic wave properties of rocks (including wave speed, amplitude, and dominant frequency) under the cyclic...

... ABSTRACT: The hypoplastic constitutive model is widely utilized for simulating soil behaviour. This study investigates the applicability of the hypoplastic model in predicting the mechanical behaviour of sand under both monotonic and cyclic loading conditions. Monotonic loading conditions...

... structure and behavior under cyclic loading conditions can be used to predict ground vibration behavior and mitigate its effect. This study investigates key physics in cyclic dynamic wave propagation in rocks and provides fundamental results on dynamic wave propagation and attenuation in phyllite...

... ABSTRACT: Argillaceous siltstone is a common hydrophilic rock in geotechnical engineering, and its mechanical properties undergo significant changes under the combined influence of water and cyclic loading. Therefore, systematically investigating the mechanical behavior of argillaceous...

.... In this study, we studied the fatigue failure of cement through cyclic loading experiments on thick-wall-cylinder samples. To simulate the actual wellbore conditions, we designed a two-layered sample, incorporating casing and cement. A dedicated tri-axial facility was modified to introduce cyclic internal...

.... INTRODUCTION Dynamic stress, which refers to force applied through impact, vibration, blasting, pulse, hydraulic, seismic, and rolling mechanisms at very short time intervals, results in deformation and breakage of rocks when the bearing capacity is exceeded. On the other hand, cyclic loading refers...

.... In recent decades, non-destructive stress measurement methods have been developed as a reliable alternative to traditional methods. These methods are based on rock stress memory and rely on accurate measurements of strain and acoustic data during uniaxial cyclic loading of specimens. In this study, several...

... on the topic of observance and persistence of stress memory have been performed at relatively low stress levels under uniaxial conditions. Meanwhile, it has long been known history-dependent behaviors in cyclic loading of rocks depend heavily on confining stress (Zoback and Byerlee 1975). Therefore, this paper...

... of full field strain measurement for locating the point of inflection in deformation rate analysis. Cyclic loadings were performed on Brazilian disc specimens of Adelaide black granite and the deformation process was monitored using digital image correlation (DIC) and AE monitoring system. The tests were...

... experiments, this paper introduces a novel cyclic injection procedure to effectively fracture rock at lower-than-normal breakdown pressure without incurring additional equipment or hardware costs. The experiments reveal that • With an optimized cyclic loading design, we can effectively and consistently...

... out true triaxle cyclic loading and unloading tests on granite, marble and sandstone. Duan (Duan et al., 2021)analyzed the influence of true triaxle graded cyclic intermediate principal stress on coal deformation, energy consumption and damage through experiments of coal mechanics and damage...

... - formation assembly is established to analyze the stress law of cement sheath. The integrity of the cement sheath is analyzed. The results show that the elastic modulus of cement is 6 GPa and the Poisson’s ratio is 0.17. The compressive strength and tensile strength of cement after cyclic loading are 90MPa...

... ABSTRACT: Gas storage caverns built within rock salt formations experience cyclic loading conditions either when gas is injected into the storage or when the gas is retrieved. The behavior of polycrystalline rock salt under cyclic loading conditions is well documented in the literature...

..., the mechanical parameter and deforming feature were acquired. Then, triaxial cyclic loading test was performed, the mechanical response mechanism of cement stone under alternating load was revealed. Moreover, based on test datum, a multi-step elasto-plastic calculation model was established for casing-cement...

... a baseline blueprint to refine triaxial experimental data for the sake of accurate calibration of advanced constitutive laws. Reservoir Characterization Engineering Upstream Oil & Gas reservoir geomechanics Rock mechanics cyclic loading plasticity Mining Science experiment loading...

... pressure, which is like the behavior of rock under uniaxial and tri-axial cyclic loading, cyclic injection can bring about fatigue. (2) For spiral perforation completion wellbore, the hydraulic fracture initiation only starts at the weakest perforation. Once a fracture is open, other perforation holes...

... ABSTRACT: Cement sheath integrity supports the long-term safety production of oil and gas well. In order to research failure mechanism of cement sheath in HPHT conditions, uniaxial and triaxial compressive tests and cyclic loading test of cement are conducted, and mechanical property...