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Keywords: surface roughness
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Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1767
... ABSTRACT: Anisotropy in the mechanical properties of rock is often attributed to bedding and mineral texture. Here, we use 3D printed synthetic rock to show that, in addition to bedding layers, mineral fabric orientation governs sample strength, surface roughness and fracture path under mixed...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0266
... morphology contact area fracture surface fracture asperity surface roughness deformation 1. INTRODUCTION Most of the shale gas reservoirs in southern China are located at depths of 3500~4500 m. It is likely to form a combination of stem fracture and branch fractures in the hydraulic fracturing...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0393
... investigated in this research. Results indicated that the fracture surface roughness and the contact area were altered. However, the topography of the fracture surface and the aperture distribution could not be obtained directly from the permeability experiments. Therefore, a triaxial cell with heating...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2125
... conductivity. Partial-monolayer proppant placement could bring high conductivity under low closure stress, while multilayer proppant placement sustained enough conductivity under high closure stress. Optimal proppant parameters were changed with fracture surface roughness and closure stress. Taking initial...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1994
... practical methods for the analysis of joint surface roughness from three-dimensional Structure-from-Motion (SfM) photogrammetry models and two-dimensional cylindrical core scan photographs. In order to understand the variability of joint roughness on the surface of a discontinuity through drill core...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-022
... parameters governing the shear strength of rock fractures is the surface roughness, which is generally determined using the Joint Roughness Coefficient . This parameter is often determined subjectively in the field by comparison with 10 predefined roughness profiles. Recent studies indicate that surface...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0389
... when choosing profiling methods and assessing profile roughness when characterizing differentially weathered and vuggy specimens. 1. INTRODUCTION variation specimen vuggy profile Reservoir Characterization roughness index bland-altman plot perturbation surface roughness 45-degree line...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-737
.... The impact of surface roughness on data quality was uncertain. As an example of the impact of sample surface roughness on indentation results we will show an example of a core plug that was prepared for standard triaxial testing and then analysed using nano-indentation. The surface roughness of the plug-end...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-367
... reservoir-scale observables. time lapse image application surface roughness fracture pattern displacement fracture microfluidic shale fracture network scco 2 complex reservoir operation experimental system hydraulic fracturing upstream oil & gas investigation flow in porous media...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-485
... and an analysis of the data will be discussed. In addition, a fracture flow simulation will be conducted using the surface roughness and aperture data obtained by the µX-ray CT. 1. INTRODUCTION It is well known that for a rock fracture under various thermal and stress conditions, a reduction in permeability...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-010
... joint amplitude lab-scale unevenness asperity angle degradation wear constant shear displacement roughness geomech abstr plastic shear displacement strength wavelength surface roughness upstream oil & gas reservoir geomechanics shear strength coefficient friction angle...
Proceedings Papers

Paper presented at the 48th U.S. Rock Mechanics/Geomechanics Symposium, June 1–4, 2014
Paper Number: ARMA-2014-7168
.... Using the slope angles the surface roughness parameter Z2swas readily determined and correlated with the JRC, resulting in an empirical model that indicated the robustness of the method. roughness rock discontinuity roughness Upstream Oil & Gas triangular facet rock discontinuity surface...
Proceedings Papers

Paper presented at the 48th U.S. Rock Mechanics/Geomechanics Symposium, June 1–4, 2014
Paper Number: ARMA-2014-7454
... specimen software dip direction US government facet international journal gauge surface roughness 1. INTRODUCTION The evaluation of surface roughness is not a new field, nor is it unique to the world of rock mechanics. Many other scientific fields have made use of roughness information...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-110
..., the surface roughness of the sample sections was studied by taking advantage of Profilometer scanning microscope images in relation to the applied stress load. This paper details the experimental procedures used and the results obtained to date. reservoir geomechanics stress magnitude situ stress...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-488
... Characterization computer based training roughness measurement surface treatment operation educational technology traverse velocity operation axis surface roughness educational software performance assessment standoff distance surface treatment careddu pump pressure water jet Upstream Oil & Gas...
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-10-331
... of flow by affecting the hydraulic aperture [4]. About the pressure loss of grout flow, the JRC was not considered especially, and the pressure loss was calculated by just using the friction factor of laminar flow which was a function of the Reynolds number in channels. The surface roughness affects...
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-10-365
... Reservoir Characterization Wellbore Design wellbore integrity shear strength recovery specimen experimental result rock fracture Dieterich shear stress geophysical research roughness shear displacement surface roughness deformation pressure solution fracture condition fracture 1...
Proceedings Papers

Paper presented at the Alaska Rocks 2005, The 40th U.S. Symposium on Rock Mechanics (USRMS), June 25–29, 2005
Paper Number: ARMA-05-867
... that there exists good agreement between numerical and analytical solution. And, an increase of amplitude-to-wavelength ratio (increase of surface roughness) caused a proportionate decrease of discharge can be confirmed. INTRODUCTION Flow in fractures was initially estimated using the conceptually parallel...
Proceedings Papers

Paper presented at the DC Rocks 2001, The 38th U.S. Symposium on Rock Mechanics (USRMS), July 7–10, 2001
Paper Number: ARMA-01-0777
..., the concept of scale effect in roughness anisotropy has been investigated. This sampling technique and associated analysis allows us to investigate anisotropy of surface roughness in a new way. INTRODUCTION The structural and mechanical behaviours of rock masses are complex, due to the presence...
Proceedings Papers

Paper presented at the Vail Rocks 1999, The 37th U.S. Symposium on Rock Mechanics (USRMS), June 7–9, 1999
Paper Number: ARMA-99-0415
... condition test shear direction mechanical behavior loading condition deformation Reservoir Characterization stiffness displacement curve normal stress shear stiffness joint surface roughness surface roughness equation Rock Mechanics for Industrx, Amadei, Kranz, Scott & Smeallie (eds) ¸ 1999...

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