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Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1856
... hardness upstream oil & gas ignimbrite block correspond avalanche block distal area standard deviation reservoir characterization rebound index avalanche non-welded ignimbrite phonolite block deposit reservoir geomechanics rock avalanche facies escarpment lithotype ARMA 21 1856...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1238
... as the need to support the weight of the overburden strata up to the ground surface (Esterhuizen et al., 2011.) metals & mining pillar strength upstream oil & gas displacement reservoir characterization support reaction curve equilibrium point criteria convergence src correspond...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-2011
...., 2012). machine learning logistic regression earthquake madrid binary classification predictor algorithm artificial intelligence spain coefficient landslide accuracy correspond random forest recursive elimination seismic-induced landslide román-herrera university complutense...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0034
... for each model showing the fine differences between the models. Artificial Intelligence exponent hydraulic conductivity 2-parameter model machine learning Fluid Dynamics pressure parameter sorptivity test Upstream Oil & Gas correspond sorptivity capillary pressure curve numerical...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2023
... are obtained from the discretized governing equations. These results show that the borehole pressure continues to increase after fracture initiation to eventually drop off. According to this model, the peak pressure does not correspond to a breakdown of the formation, but rather to a transition between two...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-572
... fluid fracturing materials mechanism Crawford fracture treatment proppant embedment petrographic analysis julia field fracture surface area fracture face skin formation proppant pack interface proppant pack Embedment mechanical damage Upstream Oil & Gas correspond conductivity...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0894
... a system subdivided in N x times N y regions and investigate two types of heterogeneity: continuous and discrete. The former consists of systems with parameters sampled from a continuous probability density function (pdf), while the latter correspond to systems with a finite number material types...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0885
... the mesh should be refined. A suitable mesh size is given for both chamfer geometries. The influence of the friction coefficient on cutting forces is evaluated, suggesting a cutter configuration insensitive to the value of the friction coefficient within a realistic range. cutter correspond...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0396
... in the fracture length estimation for the considered cases. reference solution regime Dontsov fracture tip fracture toughness Peirce elasticity equation equation hydraulic fracturing accuracy correspond non-local elasticity epkn model algorithm fracture Upstream Oil & Gas elasticity...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-172
... information about the development of reservoir fracture systems through time. complex reservoir Miocene event fracture characterization Simulation hydraulic fracturing correspond fracture distribution orientation fracture direction Reservoir Characterization Upstream Oil & Gas south dome...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-447
.... The magnitudes of MEQ for these two scenarios were similar and mostly between -0.75 and 0.75 in strength. For all cases, the event locations of MEQs corresponded to the fracture propagation. Thus, the forward simulation of microearthquakes can be a useful to detect propagation of hydraulic fractures...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-502
... approximately five seconds corresponding to crack initiation and propagation. The AE setup was used in a series of hydraulic fracturing experiments on granite specimens. It was found that for one particular specimen, few emissions were observed until the applied water pressure reached 90% of the failure...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-132
... intersection natural fracture hydraulic fracturing partially-cemented natural fracture fu fracture fracture propagation correspond 1. INTRODUCTION Hydraulic fracturing is a widely used well-stimulation technique for enhancing the productivity of oil and natural gas in unconventional reservoirs...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-287
...-dependent delay. equation rotation speed configuration timescale perturbation critical speed upstream oil & gas instability steady-state response rgd model stability analysis oscillation vibration rotary drilling system correspond stick-slip instability regime unstable pole...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-297
... or viscous regimes of propagation by using the corresponding asymptotic solution at the tip element. Since either the viscous or toughness asymptote is used, the intermediate regime is not described accurately. To deal with this problem, this study aims to implement the intermediate asymptotic solution...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-362
... geomechanics brazilian test rock sample rotation angle mineral fracture thin section correspond critical tensile strength mechanical property upstream oil & gas propagation numerical model elastic behavior pore geometry 1. INTRODUCTION In the last few decades, unconventional reservoirs...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-489
... fracturing in weak formations of varying ductility. The model is based on Mohr-Coulomb dislocations that are placed in the effective centres of the complete slip process that is distributed around the crack tip. The new brittleness index varies between 0 and 1 with the one limit to correspond to brittle...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-517
... by transient pore-pressure drops that correspond to both permeability and porosity increase of the fault zone. We calculate that the slip is initiated by the fault material frictional weakening, the pore pressure increase just being the trigger. Then, there is a competition between high pressure fluid...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-434
... transfer techniques are also proposed for transferring stresses to submodels inside a global model domain for wellbore stability purposes. Upstream Oil & Gas correspond Salt Zone reservoir geomechanics global model Submodel wellbore stability purpose Symposium substructure stability...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-541
.... The cylindrical migmatite samples had a horizontal foliation and one of them had a pre-existed crack. The ultrasonic measurement was carried out during applying a uniaxial constant strain-rate loading. Orientation of the velocity ellipsoid corresponded to the anisotropy of rock structure up to activation...

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