.... 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...

... the seismic signatures between this experiment and a sister experiment carried out under constant strain rate loading. Compared with loading under a constant strain rate, reactive loading to maintain a constant micro-seismic event rate increases the seismic b-value, decreases the maximum event magnitude...

... in the SHARP project ( www.sharp-storage-act-eu ). This includes burial compaction, erosion and uplift, glacial loading during the last ice age. Constrained modulus (M) and permeability (k) are key parameters in modelling deformation responses during compaction, tectonic uplift, erosion and glacial loading...

... compaction over time (Patzek et al., 2014; Wang, 2018). Among the viscous properties, creep becomes an important mechanism depending on the loading conditions over time. Creep, a phenomenon inherent to time-dependent deformation, significantly influences the mechanical integrity of shale formations. When...

... that is placed on the wall is due to the self-weight loading of the backfill itself. A coupled (or tight) filling situation means that the fill mass can connect to the UDS and the wall load consists of the deposited backfill's self-weight load plus the pressure within the UDS (see Figure 1). Understanding...

... rock-like specimens with an initial flaw with various inclined angles (α = 30°, 45°, 60°) using the high-resolution Micro-CT scanner with a loading apparatus. Based on the CT images of 3D-printed rock-like specimens obtained at different scanning steps, the 3D reconstruction and digital volume...

... to geomechanical loading states have been conducted with large scale numerical models of reservoir, rock and the wellbore. In this context, we present a method to assess well integrity from a kinematic analysis of the geomechanical displacement field. The crux of the analysis is to regard the displacement field...

... chosen as a laboratory analog for the FORGE site granitoid. We performed triaxial tests on 1.5" by 3.5" cylindrical cores involving a test program including isotropic compression, cyclic loading, and triaxial compression in three preferred directions under low to high confining pressure. In these tests...

... intersections. To investigate this, we have explicitly modelled the stress distribution around tunnels near intersections with various configurations and loading conditions. Using these results, we present an approach to estimating stress magnifications near intersections that does not require explicit...

... 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...

... direct incorporation into a numerical stress model. The method is verified using analytical cases of confined inelastic deformation as well as brittle failure around a tunnel. The method can be used to assess the redistribution of stresses and change in the loading of tunnels in seismically active mines...

... residual stresses in modelled specimens of rock to investigate the potential for damage to be present as a result of their redistribution. Residual stresses were formed under load, and once present the specimen was unloaded and damage was quantified through the number of broken subcontacts within the model...

..., thorough investigations into the mechanical properties of geopolymers are essential to gain a better understanding of their performance when subjected to varying loading conditions. This includes a comprehensive understanding of their fracture behavior when subjected to mode I loading, a critical aspect...

... that the 3D FES models incorporate the complexity of salt loading not captured by any VES approach and can provide pressure and stress estimates along any existing or planned well paths. 1. INTRODUCTION Pre-drill pore pressure and stress prediction is crucial for borehole stability, planning of safe...

... 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...

..., and initial defects may modify the chipping mechanism. To investigate the fragmentation mechanism in typically drilled rocks, dynamic indentation tests were conducted on limestone and granite. Results of high-speed camera observations revealed that chipping occurred during the loading phase in the granite...

... ABSTRACT: Here, we present a preliminary laboratory study of visco-plastic deformation at representative reservoir temperatures. We performed three loading and unloading stages on each sample, measuring time-dependent deformation after each stage. For two samples, we started at room...

... of granite to better understand the fracturing process of brittle rocks under indirect tensile loading. In the experimental part, two independent monitoring techniques, Acoustic Emission (AE) and high-speed imaging, were deployed to investigate micro and macro cracking processes. The sample's behaviour...

... that dissipated energy increased with incident energy under cyclic dynamic loading. However, the ratio of incident energy and characteristic impedance possess slightly higher coefficient of determination for estimating dissipated energy in rock specimens. Further investigations showed that the characteristic...

..., the impact of loading history and high salinity water (HSW) on the permeability of fractured shale has been investigated via laboratory studies. The fractured shale sample was loaded and unloaded under different effective stresses with nitrogen gas injection, resulting in a decrease in fracture permeability...