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Keywords: microcrack
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Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-2066
... ABSTRACT: Understanding of the coupling of microstructural parameters to the mechanical deformation of rock requires a multiscale workflow which incorporates the impact of small scale heterogeneity including micropores and microcracks. Previous studies that identify these small features have...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1965
... characterization upstream oil & gas reservoir geomechanics barre granite hydraulic fracturing strength shear strain experiment relaxation experiment rock mechanics relaxation evolution microcrack international journal threshold relaxation stage structural geology stress relaxation multistage...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1192
... ABSTRACT: This work presents a thermodynamic-consistent directional damage theory that considers the kinetics of microcrack growth for brittle rocks. The novelty of the theory is that the distribution density of microcracks is directly incorporated at the continuum level through the notion...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1780
... heterogeneity (Suàrez-Rivera et al., 2002), and strength parameters (Mitaim et al., 2004). reservoir geomechanics microcrack failure mode critical cutter depth reservoir characterization scratch test particle failure mechanism transition strength cutter depth upstream oil & gas coefficient...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0305
..., a 2-dimensional grain-based model (GBM) which can mimic the thermal expansion and microcracking of polygonal grains is developed to examine the response of Carrara marble to thermal-mechanical loading from a microscopic point of view. Two sets of GBMs with different rock textures are designed...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1556
..., microcracking behavior associated with failure modes is investigated. The simulated results show that the 3D-GBM can capture the strength properties and deformation behavior associated with the failure modes of salt rock. This model provides an alternative and promising method to deeply investigate the micro...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2137
... ABSTRACT: Carbonate reservoirs are characterized by extremely heterogeneity full of microcracks and vugs in it. It also presents anisotropic property of water filtration in terms of distribution of microcracks and void space. Incidents are common practice when drilling through carbonate...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0437
... area including the tensile and shear microcracks, the pipe apertures, and the pressure evolutions within NFs. shale gas aperture mechanism experiment complex reservoir natural fracture viscosity hydraulic fracturing microcrack nf hf interaction Upstream Oil & Gas pressure...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1730
... nucleation stress when shearing became dominant. The dominance of non-tension microcracking was characteristic for oblique foliation. The uniaxial loading of anisotropic migmatite resulted in triaxial stress state regardless of the foliation dip. The minimum stress axis was in the subhorizontal direction...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-568
... rock failure process of rock under uniaxial compression. The modeling results indicate that the strength heterogeneity of inter- and intra-grain contacts affects the microcrack spatial location and hence the fracturing path and fracture pattern. Moreover, the tensile strength of grain contact controls...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-051
... contribute to the injection-related fracture initiation. fluid modeling Upstream Oil & Gas mechanism equation of state fluid injection cfd-dem approach fluid flow injection hydraulic fracturing Simulation microcrack pressure drop velocity field particle fracture initiation base case...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-054
... scale, these formations are suitable for multiscale modelling framework. As one of the source of heterogeneity, microcrack growth serve as an important mechanism in the inelastic and fracture behavior at the macroscale. To this end, a probabilistic four-level multiscale framework is utilized...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1100
... the fracture strength varies not just spatially, but also by the angle of loading, this work includes angular variability to properly model a heterogeneous rock domain. Two different microcrack distributions, one angularly uniform and one angularly biased towards a specific angle, are used to show...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1094
... defects and inhomogeneity. In the approach, microcracks with certain statistics are incorporated in the computational domain. In the approach, fracture strength values are sampled using a Weibull probability distribution. We use the Mohr-Coulomb failure criterion to define an effective stress...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-878
... hydraulic fracturing strength mineral phase boundary CCE reduction orientation Simulation synthetic sample Artificial Intelligence element method microcrack mahabadi strength property intensity penalty grain boundary frictional value finite-discrete element method mechanics 1...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0643
... microscale features similar to RVEs, and provide a more economical solution approach than those methods that explicitly model all microcracks in rock. To create a random field for macroscopic fracture strength field, we first generate several realizations of rock with a prescribed crack density...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0829
... serpentinite microcrack MPa attenuation anisotropy pressure level Upstream Oil & Gas radiation pattern Vavry�uk amplitude dependence spherical sample p-wave velocity anisotropy 1. INTRODUCTION Seismic velocity and attenuation anisotropy is an important property of many crustal and mantle...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0308
.... The microstructure at different stages of deformation indicates that grain-boundary cracking is the dominant brittle deformation mechanism. Microcracking is influenced by the loading configuration and the geometric relationships between neighboring grains. These microcracks display a preferred orientation parallel...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-030
... evaluation. However, so far the Bakken Formation has not been investigated very much in comparing to the rapidly increasing development activities. Reservoir Characterization Fluid Dynamics microcrack coefficient bulk compressibility heterogeneity lamination flow in porous media Biot Upstream...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-143
... experiment hydraulic fracturing microcrack cleavage diameter Wellbore Design cleavage anisotropy roughness analysis specimen cleavage plane MPa granite anisotropy breakdown pressure characterization Injection Rate fracture pocheon granite mineral permeability 1. INTRODUCTION Geothermal...

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