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Keywords: texture
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Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-2043
... textures. Specifically, micro-structural variations in grain sizes and bonding strengths inside each layer may introduce a higher degree of anisotropy. There is a wide range of variability of laboratory-measured fracture toughness of natural rock specimens because of micro-structural textures. However...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0483
... ABSTRACT: Anisotropy in the mechanical properties of rock is often attributed to layering or mineral texture. Here, results from a study on mode I fracturing are presented that examine the effect of layering and mineral orientation fracture toughness and roughness. Additively manufactured...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1842
... Reservoir Characterization open fracture texture deposit fracture wall porosity arrangement fracture propagation Laubach Geol accumulation sandstone quartz accumulation east-striking fracture 1. FRACTURE FORMATION AT DEPTH As engineering operations increasingly focus on deeply buried rocks...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-798
... mesh communication virtual reality hololen mixed reality dataset application interpretation characterization holographic model vr application landslide photograph terrain software texture 1. INTRODUCTION A wide variety of techniques can be used to collect data during surface...
Proceedings Papers

Paper presented at the 48th U.S. Rock Mechanics/Geomechanics Symposium, June 1–4, 2014
Paper Number: ARMA-2014-7532
... texture Reservoir Characterization Fluid Dynamics axial stress pore-pressure-depletion test assumption loading effective-stress test increment 1. INTRODUCTION Pore volume compressibility (Cp) is a rock property that defines changes in pore volume in relation to changes in the applied stress...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-667
... that respond to changes in texture and composition at these various scales. Results provide the volumetric distribution of rock classes or regions with similar and dissimilar texture and composition. This classification defines the geometric heterogeneity of the system. Results also provide rock physics models...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-366
....) and fine-scale stratification (sub-mm to mm scale). Shale cores are further characterized through continuous measurement of physical properties at mm resolution (quantitative geologic analysis), to acquire a data volume sensitive to changes in texture and composition. The process permits differentiation...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-391
... Upstream Oil & Gas heterogeneity variability composition rock class rock texture thermal heterogeneity thermal conductivity rock sample anisotropy diffusivity porosity continuous measurement texture volumetric heat capacity thermal property measurement 1. INTRODUCTION Solutions...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-415
... depth from the surface. As part of the rock characterization process, petrographic thin sections of welded tuff were prepared and used to describe rock texture and mineralogy. High resolution X-ray CT scanner was also used to provide 3D images of the rock pore structure. Rock permeability and porosity...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-566
... ABSTRACT: The study on the mechanisms affecting the strength and the elastic modulus of a crystalline rock has been focused on a marble, variable in texture, despite an almost monomineralic calcitic composition. A wide experimentation was conducted on three levels: macro-scale (scale...
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-09-105
... by sequences of carbonate-evaporite bedrock. Between depositional cycles, the materials were subjected to weathering both physical and chemical weathering. The weathering produced changes in both composition and texture, including dissolution, lithification, and dolomitization. The dissolution process resulted...
Proceedings Papers

Paper presented at the The 42nd U.S. Rock Mechanics Symposium (USRMS), June 29–July 2, 2008
Paper Number: ARMA-08-236
... stress porosity kPa reservoir geomechanics overburden compaction extension Upstream Oil & Gas texture shear stress conjugated shear band peak strength burial depth Brent Group perpendicular strain rate deformation 1. INTRODUCTION Strain tests on sand gives unique insight...
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-05-684
... that can influence the burst potential of rocks, but as its nature feature, the rock composition & texture are the intrinsic factor to control its burst potential. Based on the micro quantitative determination of rock thin sections and macro mechanics test of rocks, strength characters and deformation...
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-05-758
... composition evaluation shale tight gas shale Upstream Oil & Gas fracture containment mechanical property laboratory measurement in-situ stress anisotropy texture 1. INTRODUCTION Hydraulic fracturing of vertical or horizontal wells is the primary methodology for completing nano- darcy matrix...
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-01-0147
... mineral texture composition characteristic image analysis pore space mineral grain semi-quantitative prediction Feldspar Rock Mechanics in the National Interest, Elsworth, 7 nucci & Heasley (eds), ¸ 2001 $wets & Zeitlinger Lisse, ISBN 90 2651 827 7 Mechanical behaviour of reservoir grain...
Proceedings Papers

Paper presented at the The 32nd U.S. Symposium on Rock Mechanics (USRMS), July 10–12, 1991
Paper Number: ARMA-91-713
... ABSTRACT: Clays that form the matrix of melange deposits such as the Joes River Formation in Barbados are characterised by a texture comprising of a high density of anastomosing, curved, polished shear surfaces of low shear strength. This texture gives the unweathered clay a scaly appearance...
Proceedings Papers

Paper presented at the The 29th U.S. Symposium on Rock Mechanics (USRMS), June 13–15, 1988
Paper Number: ARMA-88-0103
... features for stable and stick-slip motion. This paper compares the deformation textures developed in clay-rich and quartzofeldspathic gouges, and describes how the results possibly can be tested against actual fault zones. 2 CLAY-RICH GOUGE Over 100 experimental run products of a gouge consisting...
Proceedings Papers

Paper presented at the The 23rd U.S Symposium on Rock Mechanics (USRMS), August 25–27, 1982
Paper Number: ARMA-82-132
... correlation studies to be carried out. The principle of a quantitative petrostructure analysis is outlined and illustrated using maps from two samples of Conway granite. It has long been recognized that correlations exist between observable crack patterns, grain texture or fabric and bulk physical...
Proceedings Papers

Paper presented at the The 23rd U.S Symposium on Rock Mechanics (USRMS), August 25–27, 1982
Paper Number: ARMA-82-405
... INTRODUCTION ABSTRACT This paper describes a workshop on deformation mechanisms and texture development in rocks. Emphasis is on relating macroscopic mechanical properties with microscopic structures and the methods of their quantitative analysis. In conjunction with the 23rd U.S...
Proceedings Papers

Paper presented at the The 23rd U.S Symposium on Rock Mechanics (USRMS), August 25–27, 1982
Paper Number: ARMA-82-279
... motions) predominates at all conditions. Dislocation gliding contributes little to the strain. Precursive extension microfractures coalesce to produce the through going faults with gouge zones exhibiting possible Riedel shears. Incipient melting, particularly in wet tests, produces a distinctive texture...

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