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Keywords: crack growth
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Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-943
... chemical effect. This could be explained by the mechanism of subcritical crack growth in rock. Series experimental tests were performed in this study by using the Double Torsion (DT) method on Changqing tight oil sandstone under different fracturing fluid conditions. At the same time, the test of the...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-187
... crack length brittleness index Reservoir Characterization hydraulic fracturing injection pressure crack growth enhancement extension principal stress fracture permeability evolution Magnitude deformation in-situ stress propagation 1. BACKGROUND United States has benefited economically...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0150
... Characterization surface subsidence mechanism creep response particle compaction breakage Artificial Intelligence dissipation rate function Grain Breakage Corrosion Index subsidence equation creep propagation crack growth fracture mechanics breakage model creep curve deformation 1...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0747
... ABSTRACT: The problem of thermal crack growth due to cold-water injection has been an important issue as a means of reservoir permeability enhancement in geothermal reservoirs. In this paper, we present numerical investigation of thermal crack growth in the vicinity of a borehole and a...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0815
... Eberhardt Mining Science specimen Upstream Oil & Gas Rock mechanics crack growth granite Reservoir Characterization attenuation geomechanics abstract volumetric stiffness crack initiation stress amplitude AE activity estimation interpretation fracture ultrasonic method...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-498
...). Wellbore Design tertiary creep wellbore integrity Martin fracture strength Reservoir Characterization strength crack growth specimen MPa creep Upstream Oil & Gas experiment radial strain differential stress millistrain partial pressure constant stress tuff strain rate static fatigue...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-581
... Abstract: Assessing long-term rock stability is an important aspect in the analysis of slopes, dam and bridge foundations, and other infrastructure. At such long time scales, rock failure occurs through time-dependent methods such as subcritical crack growth. Natural analogs, such as caves...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-597
... system was used to observe the fracture behavior at the tip of the notch of SNDB samples during dynamic impact loads. The fracture planes around the notch tip of the tested samples were observed by microfocus X-ray CT scanner. crack growth loading rate dependency rock sang-ho cho toughness...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-713
... increase. Even aside from considering fractures, we find it also has well behaved numerical properties, and does not generally require special stabilization approaches like some other gridless methods, such as Smoothed Particle Hydrodynamics (SPH). Therefore, a desire tomodel dynamic crack growth in...
Proceedings Papers

Paper presented at the 48th U.S. Rock Mechanics/Geomechanics Symposium, June 1–4, 2014
Paper Number: ARMA-2014-6995
... crack growth behavior does not show any signs of unstable growth, even in the high-speed transition regime. The predictions of crack growth kinetics show a good agreement with some published experimental results and highlight the stabilizing effect of fluid transport on crack growth. flow in...
Proceedings Papers

Paper presented at the 48th U.S. Rock Mechanics/Geomechanics Symposium, June 1–4, 2014
Paper Number: ARMA-2014-7398
... transient creep reservoir geomechanics creep axial strain dependency fjær stress level Upstream Oil & Gas crack growth dynamic moduli Symposium FORMEL model hold period deformation Rock mechanics geomechanics Symposium 1. INTRODUCTION Time-delayed deformation is a phenomenon that can...
Proceedings Papers

Paper presented at the 48th U.S. Rock Mechanics/Geomechanics Symposium, June 1–4, 2014
Paper Number: ARMA-2014-7622
... also indicate that there is a small-crack growth regime at the beginning stage, where the growth rate decreases as the crack propagates. The fracture kinetics for both the small-crack growth and the Paris regimes is subjected to a strong size effect. During the strength and fatigue tests, the damage...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-444
... mechanics Upstream Oil & Gas reservoir geomechanics hydraulic fracturing modeling crack length specimen fracture trajectory porosity configuration specimen size strength scale effect criterion crack arrest crack growth probability facture toughness aggregate size 1. INTRODUCTION A...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-615
... extended to the back surface of the specimen and the petal cracks formed a type of crack arrays (Fig. 1b). Cannon et al. [10] tested PMMA material containing an Fig.1. Crack growth from a 3-D pre-existing surface crack: in (a) glass [8]; (b) marble (back surface) [8]; and (c) PMMA [11]. open pre-existing...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-274
... propagation path. Numerical experiments are carried out to study fracture propagation trajectories compared with elasticity solutions. The numerical results indicate that the fracture growth under undrained condition does not show distinctive differences because the crack growth is so fast that the pore...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-425
... borehole were numerically simulated in [13-15]. In [14], propagation of some crack was described qualitatively. reservoir geomechanics Artificial Intelligence thermally hydraulic fracturing fracture toughness crack growth Reservoir Characterization Upstream Oil & Gas crack length radial...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-436
... rate crack growth fracture crack tip interaction 1. INTRODUCTION Multistage hydraulic fracturing in long horizontal wells has become a common practice for economic production in extremely low permeability hydrocarbon reservoirs. For each stage of fracturing, several perforations are performed to...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-513
...” approach introduced by Rabotnov (1968) is used. hydraulic fracturing heterogeneity reservoir geomechanics damage mechanics crack growth Upstream Oil & Gas Simulation fracture surface distribution function propagation Reservoir Characterization geothermal reservoir boundary condition...
Proceedings Papers

Paper presented at the 44th U.S. Rock Mechanics Symposium and 5th U.S.-Canada Rock Mechanics Symposium, June 27–30, 2010
Paper Number: ARMA-10-374
... of rock structures, such as tunnel and dam. At present, the mechanism of crack growth and coalescence in rock mass remains one of the most fundamental and promising problems in both academic and engineering aspects. A number of studies have been performed to investigate the growth rules of 2...
Proceedings Papers

Paper presented at the 43rd U.S. Rock Mechanics Symposium & 4th U.S. - Canada Rock Mechanics Symposium, June 28–July 1, 2009
Paper Number: ARMA-09-084
... from depths of 1000~2000 meters were reloaded back to their in-situ stress levels while simultaneously measuring P and S wave velocity. The results from the thermal shock tests were very interesting and showed that crack growth occurred in some rock types subjected to thermal shock (Granite, Diabase...

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