... demands and lengthy execution times in serial code implementations. However, the implementation of DEM in a modern HPC (High-Performance Computing) environment opens opportunities for efficient and affordable, full-scale analyses of failure initiation and runout. geological subdiscipline friction...

.... The data analysis shows that cohesion () and dilation angle ( ψ ) have a negative exponential correlation with plastic shear strain and both these parameters become almost constant in the residual zone. The internal angle of friction ( ϕ ) remains almost constant after attaining its peak value as plastic...

... on fault/fracture frictional stability. We use simulated epidote/chlorite gouges and conduct fault shear experiments at conditions typifying the ∼4 km depth typical of deep geothermal reservoirs to explore the effect of epidote/chlorite content on frictional strength and stability. Results indicate...

... in such projects, the frictional properties of the fault typically control fault rupture and seismic response (Ikari et al., 2011; Niemeijer & Collettini, 2014). Thus, detailed characterizations of the evolution of fault strength and stability under hydrothermal conditions are crucial in understanding...

... bed would directly increase the contact area so that wellbore friction during drilling is also increased. The increase in friction can cause serious underhole accidents. Hence it is necessary to study the parameters affecting the friction between the drillpipe and cuttings bed. The viscosity...

... and rebound velocity, fragment mass, and the range of rock cracking after impact. The results revealed that, for both St Anne limestone and Rhune sandstone, during a single impact, only 2.4-2.6% of the energy was utilized for crack propagation, while 30-70% of the energy was consumed by friction between...

... deposit rock type geological subdiscipline strength geologist mudrock investigation shear strength friction canada reservoir characterization scenario ore indian standard method determination geotechnical implication captured image ARMA 24 1124 Geotechnical Implications of Large Shale...

... ABSTRACT Fluid injection into geothermal reservoirs can enhance reservoir permeability and thus improve thermal recovery efficiency, but large-scale fluid injection may reactivate underground faults and induce earthquakes. The relationship between friction and permeability of natural faults...

... and eliminate the boundary effect. Then, the short-range force is utilized in PD to model the contact of the crack surface and prevent the particles from penetrating each other. In addition, the tangential force of the short-range force is introduced to simulate the friction sliding effect of the crack surface...

... friction (RSF) is well-established as a robust description of rock friction. It is, however, strictly empirical and extension to hydrothermal conditions relevant to geothermal stimulation is problematic. We extend a microphysical model to hydrothermal conditions by incorporating thermally activated...

... government pressure distribution calculation pressure loss fracture propagation path displacement friction construction parameter ARMA 23 858 Research on Targeted Hydraulic fracturing control method based on theoretical model W.Z. WANG, G. YANG, H.G. WANG CNPC Engineering Technology R&D Company...

... of vibration drag-reduction tools are closely related to the drag reduction efficiency. At present, the parameter design of vibration drag reduction is mainly based on field experience but lacks a set of effective theoretical methods. To solve this problem, the strong nonlinear effect of friction force...

... ABSTRACT: In the process of sliding drilling, installing oscillators on drill strings can decrease axial friction and increase wellbore extension effectively in sliding drilling. Traditionally, the positions of oscillators are most determined by drilling experience, which constraints the drag...

... design shale wellbore integrity experiment upstream oil & gas international journal symmetry axis undrained experiment perpendicularly overburden shale geomechanics symposium reservoir characterization friction outcrop shale orientation loading skempton literature norway ARMA 22...

... & gas modeling & simulation fracture simulator workflow soliman exhibition friction petrophysical analysis calibrate doi technical conference fracture characterization reservoir characterization exponent fracture simulation paper ARMA 22 0761 Integrating moving reference point...

... of the backfill mass may be exposed, and a risk of failure or instability due to gravity loading can occur if the backfill is not strong enough. strength friction operation tan backfill cohesion backfilled stope metals & mining interface calculation kpa reservoir characterization backwall...

... the efficiency of deep geothermal drilling. In this work, different types of nanomaterials such as graphene oxide, hybrid nano silica and their composite nanomaterials are used as additives in a water-based drilling fluid. The influence of additives on the rheological properties and the friction of the drilling...

...-Evans law. The evolution in solute concentration also affects the solvent pressure in the pores and cracks, altering the resistance to frictional sliding. Only steady-state propagation and periodic cracks are studied. An analytical solution of the crack spacing as a function of the properties...

... and hard/strong fracture surfaces – and calibrating using granular mechanics models (DEM), we conclude that the evolution of friction-permeability relationship of a propped shale fracture is largely controlled by the rock friction/rigidity. To be specific, propped hard/strong fractures show a continuous...

..., the jetting method is most mature and has been widely used in the Gulf of Mexico (GOM), West Africa, Southeast Asia, and South China Sea (Jeanjean, 2002; Mackenzie et al., 2012; Prasertamporn, 2016; Wei et al.,2019). In this paper, we focus on the jetting method. drilling equipment wellhead friction...