... Galerkin discretization scheme is used as a mass/energy conservative scheme that can capture the abrupt jump in pressure and temperature at the matrix-fracture interface. The variational phase field was used to simulate fracture initiation, propagation, and fracture width estimation. Two analytical...

... on granite. The rock breakage process, the initiation and propagation of micro-cracks, the surface topography and fracture morphology of the cutting groove and large-size debris were analyzed. A three-dimensional rock cutting model with a CDE cutter was established using the finite element method to study...

... formed by cyclic shock wave, and the rest were microcracks. And the pulse width, peak strength and frequency of cyclic shock wave have the best values for the crack propagation in coal. The fracture propagation of hydraulic fracturing with cyclic shock wave pre-cracking is simulated by numerical method...

... ABSTRACT The filling and drainage process of high-pressure bifurcated reinforced concrete pipes in pumped storage power stations (PSPS) can significantly affect the propagation of cracks in the reinforced concrete lining, which in turn impacts the structural safety and long-term stress state...

... subdiscipline triaxial test frequency reservoir geomechanics regime dilation factor plot oedometer test reservoir characterization sandstone sample dilation factor vp 0 propagation analogue sandstone sample mpa variation relation santos basin ramp stress-strain plot lithology ARMA 23 0054...

..., the extrusion between the adjacent radial borehole row, and the deflection of the maximum horizontal stress. Fracture propagation is affected by the dynamic variation of the three effects. Decreasing the stress difference is favorable for fracture propagation along the radial borehole axis, while it lifts...

... ABSTRACT A novel approach to study hydraulic fracture initiation and propagation inside Nuclear Magnetic Resonance core flooding system (NMR) was examined on 38 mm diameter (1.5") outcrop sandstone rock plugs. A 3.4 mm diameter and about 35 mm long borehole (two-third of the plug's length...

.... The impact of natural fractures is multifaceted: increased fracturing fluid loss, premature screen-out, fracture stop propagation, formation of multiple fractures, fracture offset, and high net pressure. There have been many experimental studies on the interaction between hydraulic and natural fractures...

... propagation zipper intermediate well fengnan 4 fracture hydraulic fracture adjacent well horizontal well technology condition evolution law propagation well area pressure distribution element method ARMA 23 155 Study on evolution law of pore pressure around well under different fracturing...

... characteristics and ground stress differences was carried out to analyze the characteristics of fracture penetration and migration. At low horizontal stress difference (K ≤0.15), hydro fractures will be non-plane propagation when they encounter vugs, and the fracture morphology becomes more complex. When...

... computational time aifrac-tough geological parameter permeability fracture upstream oil & gas hydraulic fracturing reservoir geomechanics natural cave iteration step propagation combining machine learning operation rock mech fracture propagation initial value curve jiangmei qiao ARMA 23...

... mpa geologist reservoir geomechanics geological subdiscipline p-wave velocity velocity distribution elastic anisotropy coordinate system upstream oil & gas amphibolite anisotropy czech republic amphibolite sample mean velocity aminzadeh experimentally elastic property propagation...

... ABSTRACT In this paper, we propose a new simulation method based on peridynamic for quasi-static fracture propagation in isotropic and transverse isotropic rocks. The new method is based on coupled peridynamic least square minimization and finite element method (PDLSM-FEM). The original...

... ABSTRACT Tight reservoirs are important resources all over the world, but its recovery rate is low. The common enhanced recovery technique is water flooding. If the fracture propagation is induced during water flooding, the recovery rate of tight reservoirs will increase. However, the quick...

... fracturing in HDR, a THM-FDEM coupling model for studying the fracture propagation behavior of radial borehole fracturing is established. Firstly, the reliability of the coupled THM model is validated by radial borehole fracturing experiments. Then, the effects of azimuth, number, length and spatial...

..., to the propagation of an elliptical-like fracture with a fixed aspect ratio. Combining theory and simulations, we study the possible emergence of an elongated hydraulic fracture from layers of alternating fracture toughness considering typical hydraulic fracturing treatments as well as micro-hydraulic fracturing...

... wave propagation in a single material medium imitating the conditions found in underground mines. Understanding how waves propagate in a medium is fundamental to better interpret real-time information for accurate rockburst prediction. For this purpose, a numerical model is developed to represent...

... control in coal measure strata. In this paper, a three-dimensional model of the hydraulic fractures penetrating layers was established based on 3D lattice algorithm. The influence of perforation position and length on the propagation of hydraulic fractures was investigated. The results showed that (1...

... spacing unit. It was cross-validated with Molina's (2019) analytical model and Morales’ (2020) mechanical testing apparatus, enabling the evaluation of hydraulic and mechanical interactions, such as pressure communication, fracture merging while propagation, and stress shadowing (Molina, 2019; Morales...

... ABSTRACT Cleats play a crucial role in the propagation of fractures during coalbed hydraulic fracturing. However, current numerical methods still suffer from significant drawbacks in terms of computational efficiency and fracture trajectory prediction. In this study, we used the displacement...