... poro-elasto-dynamic model is developed to examine the effects of pump start-up on borehole stability. Firstly, a transient hydraulic model is developed to predict the temporal variation of pressure in flow conduits during the pump ramp-up periods. A constitutive equation is used to describe the time...

... collected, and the relationship between the well diameter and time of the salt layer is mastered. On this basis, the finite element analysis model considering the creep of the salt layer is established, and the creep parameters of the salt layer are inverted based on the relationship of borehole diameter...

... of computing fluid dynamics stability geological subdiscipline tarim basin borehole instability equation reservoir geomechanics instability borehole cretaceous fractured water-sensitive formation wellbore design hydraulic fracturing reservoir characterization complex reservoir displacement...

... ABSTRACT: From 2022 to 2023, a series of hydraulic stimulation experiments were conducted at the Bedretto Underground Laboratory in Switzerland (BedrettoLab) to study the creation of an engineered geothermal reservoir in crystalline rock. A 400 m long stimulation borehole was divided into 14...

... bedrettolab borehole post mine-by tunneling switzerland new underground research laboratory engineering monitoring ARMA 24 0543 Progressive Excavation Disturbance Zone Evolution during and Post Mine-by Tunneling (PRECODE) Insight into a New Underground Research Laboratory for Crystalline Rocks...

... characterization anelastic strain recovery constrain geological subdiscipline forge orientation inversion young core ghassemi application mclennan poisson reservoir geomechanics borehole axis agreement geothermal reservoir engineering magnitude SAND2024-06409C ARMA 24 537 Anelastic Strain...

... ABSTRACT: The Dual Bit Coring (DBC) is the method to record the in-situ stress state into cross-sectional shapes of a boring core. The magnitudes and orientations of the in-situ stresses in a plane perpendicular to the borehole can be estimated from the measured core diameters upon...

... ABSTRACT: Wellbore cooldown via injecting and circulating cold fluid is a practical method to lower temperatures in the borehole and prevent damage to equipment associated with high temperature geothermal reservoirs in Enhanced Geothermal Systems. Extensive cooling often induces significant...

... in porous media reservoir characterization wiemer borehole stimulation hydraulic stimulation bedretto underground laboratory interface hertrich reproduce artificial intelligence geological subdiscipline rinaldi magnitude obermann doonechaly giardini geophysics ARMA 24-0774 Modeling...

... (DTH) percussive drilling is a widely employed technique in mining and civil engineering. In DTH drilling, a pneumatically or hydraulically activated piston (or hammer) strikes the drill bit, which fragments the rock surface and propagates the borehole. Concurrently, the drill bit rotates, and either...

... of the measured borehole diametrical deformation. One of the key input parameters in this back-analysis method is the borehole convergence. To calculate the convergence, the initially-drilled borehole diameter before deformation is required. The rock mass in the ground is always under stress and a drilled hole...

... change magnitude hydraulic conductivity meso-scale test air emission fracture igneous rock fte fracture thermal energy storage borehole implication efficiency application ARMA 24-831 Design of a Meso-Scale Test of a Fracture Thermal Energy Storage (FTES) System Burghardt, J. Pacific...

... ABSTRACT: Hydraulic fracturing nucleates fractures along the orientation of maximum stress in the normal plane to the borehole. Meanwhile, standard hydraulic fracturing cannot nucleate several fractures in different directions from a borehole and achieve permeability enhancement in another...

... those issues, a novel stimulation, radial borehole fracturing has been proposed. To have a clear understanding of the radial borehole fracturing performance, a 3D Finite-Discrete Element Method model of radial borehole fracturing is established in this paper. Then, the applicability of the HM coupled...

... structural geology rock type fractured-cavity reservoir pre-existing cavity permeability coefficient tensile strength reservoir characterization experiment cavity artificial fracture borehole conductivity injection ARMA 24 0884 Laboratory study of Fracture propagation behaviors in fractured...

... geology reservoir geomechanics hydraulic fracture borehole hydraulic fracture interaction natural fracture pre-cut pmma specimen journal deformation laboratory evaluation ARMA 24-1103 Laboratory Evaluation of Natural Fracture and Hydraulic Fracture Interactions Using Digital Image Correlation...

... in characterizing this anisotropy with the borehole deformation measured by calipers oriented at multiple diametric axes. In this work, a transversely isotropic viscoelastic model is proposed to predict the anisotropic borehole deformation for pressuremeter testing in the boreholes drilled perpendicular...

... of fracturing around the borehole, including planar fractures that extended both vertically and horizontally. Interestingly, fractures that intersected with layering interfaces could lead to horizontal fractures, despite the influence of gravity-induced stress. An isotropic parameter set used to simulate...

... ABSTRACT: The focus of this study is on stress-driven rock damage potentially developing around the tunnels and deposition boreholes of a planned underground nuclear waste repository at the Forsmark site in Sweden. This type of damage is commonly referred to as "spalling" or "brittle failure...

.... Stress measurements are carried out both in tunnels with large overburdens in civil and mining engineering and in deep boreholes for natural underground resources developments and for scientific investigations. Here, we focus on the in-situ stress measurements in both deep ocean drilling and continental...