... ABSTRACT: Self-sealing tests with water injection were performed on artificially fractured core samples of the Callovo-Oxfordian claystone using an X-ray transparent triaxial cell. 3D X-ray scans and permeability measurements were performed continuously to assess the evolution of fracture...

... energy. So far, cold water injection has been overlooked but may contribute to induced seismicity due to fault reactivation through thermal stresses also beyond the cooling region. This can be of importance, in particular, in fractured and faulted geothermal reservoirs. In this study, we first compare...

... related to the content of clay minerals in the sample (Guo et al. 2021). The tensile failure caused by cyclic hydraulic fracturing of granite core shows that compared with the fractures produced by continuous injection of rock, cyclic hydraulic fracturing can produce more complex fractures with more...

... ABSTRACT: Injection, storage, and production of fluids in geological media could be a pivotal technology in the energy transition. Injection of fluid into subsurface systems is known to have the potential to induce seismic activity. The present work models induced seismicity during CO 2...

... fully coupled multiphase THM simulations, a generic fault-bound reservoir model is used to evaluate the effect of cyclic storage operations and variable injection temperatures on stress alterations in and around the reservoirs, shifts in seal integrity, and fault stability. The preliminary findings...

... ABSTRACT: This paper successfully simulated the hydraulic fracturing process in lab-scale coal samples and induced seismicity using the self-developed code in particle flow code (PFC). Numerical simulations of fluid injection, fluid transport and seismic response are achieved simultaneously...

... role played by the bedding planes in determining the trajectory of the fluid-driven fracture network. En-echelon fractures observed near the injection borehole are convincing evidence of possible shear failures associated with hydraulic fracturing. INTRODUCTION Since its first adoption...

... ABSTRACT: Hydraulic fracturing is an effective technique for shale gas development, which breaks tight shale by injecting a large amount of fracturing fluid under high pressure. The potential impacts of hydraulic fracturing on the surrounding environments (such as hydraulic fracturing induced...

... Abstract The article is devoted to one of the most effective and promising methods for improving the structural properties of soils–the method of "Geocomposite". The method is based on the compaction and reinforcement of the soil through the injection of mortar under high pressure, as a result...

... complex reservoir in-situ experiment injection reservoir characterization carbonate reservoir hydraulic fracturing fracture expression seismicity upstream oil & gas equation hydraulic aperture discontinuity international journal rutqvist reservoir geomechanics displacement...

... injection schemes. For respective fracturing stages, the permeability is comparable for conventional and cyclic tests. Maximum permeability values and low seismicity are obtained after cyclic progressive pressurization with water hammering. Our working hypothesis for this is that energy dissipation...

... breakdown pressure for cyclic loading and were visualised by CT scans. A new advanced protocol of progressively increased cyclic injection and a pulsed injection design for hydraulic fracturing experiments was applied at the Hard Rock Laboratory in Äspö in Sweden. The dynamic stimulation scheme of loading...

... fluid dynamics specimen oil sand flow in porous media water management figure 5 figure 6 numerical modeling experiment key china university upstream oil & gas bitumen injection deformation preparation application complex reservoir enhanced recovery experiment deformation...

... Abstract Induced or triggered seismicity by hydraulic stimulation, especially the occurrence of large magnitude events has been one major challenge for EGS development. Multiple stage injection may provide an alternative for achieving long term permeability improvement while reducing induced...

... Abstract Fault activation and induced seismicity associated with underground injection activities such as geologic carbon storage (GCS), shale-gas fracturing and geothermal stimulation were simulated using a coupled flow and geomechanical numerical model with a strain-softening Mohr-Coulomb...

... Abstract A large amount of fluids usually needed to be injected into the tight stratum to target an efficient exploitation of underground energy, during which the induced seismicity is accompanied. It is conventionally thought that the injection-induced seismicity is caused by either...

..., a variance-based sensitivity analysis was adopted for importance ranking of the uncertain input parameters of the given model. However, such flow models could involve one or several spatial inputs, for instance, fault dip, distance between fault and the injection well, friction angle of fault, permeability...

... mining. However, the optimal design of hydraulic injections is often limited by continuum treatments of the rock mass without consideration of the influence of the natural fractures present. These may interact with the hydraulic fracture to promote offsets or arrest, or may cause the natural fractures...

... SAGD Upstream Oil & Gas stimulation ultra-heavy oilsand rock mechanics isrm13 injection Montreal Abstract Successful application of steam assisted gravity drainage (SAGD) on the recovery of land facies ultra-heavy oil in Xinjiang oilfield depends largely on shortening the preheating...

... is situated in Opalinus Clay, at Mont Terri, Switzerland. An experiment, consisting of the excavation of a tunnel followed by water and gas injections in a test section of the tunnel, was performed at the URL. The authors have developed a mathematical model, based on the poromechanics theoretical framework...