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Keywords: bedding
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Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0030
... ABSTRACT: Many gold and base metals deposits in Western Australia are hosted in anisotropic rock masses. These may comprise bedded siltstones, sandstone and shales or foliated mafic and ultra-mafic rocks. When bedding or foliation are unfavorably oriented, slope instability mechanisms...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0096
... ABSTRACT: The fracture energy of the shale possesses a significant anisotropy due to the shale bedding and has great effects on the fracturing path. To investigate these effects, three types of the shale specimens are applied in fracturing test with three-point bending. The Digital Imaging...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0112
... ABSTRACT: We measure acoustic travel-times in Green River shale both parallel and perpendicular to bedding to observe the effects on petrophysical properties of interactions with water (fracture fluids) for different durations. X-ray diffraction shows the samples dominantly comprise carbonate...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0442
...-induced matrix swelling. An apparent anisotropic nanopore structure is shown in Illinois coal cut perpendicular to bedding, in which the degree of anisotropy generally increases with increasing pore size. Uniaxial compression perpendicular to the bedding can cause a “two-stage” pore contraction in both...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1785
..., and bedding orientation. We found that samples sheared parallel to bedding were less likely to develop numerous secondary fractures. Fracture transmissivities tended to increase with continued shear and secondary fracture development, but a high variance exists between sample behavior. In some instances...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1734
... and to investigate the effect of different boundary conditions to provide feedback to the experimental program. Specifically, in this paper we focus on studying the effect of beddings and their orientation on the propagation of hydraulically induced fractures. For this purpose, we built a model recreating...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2103
... Oil & Gas diameter plug Brazilian tensile strength Rock mechanics geomechanics Symposium hydraulic fracturing strength bedding sidewall core tensile strength Reservoir Characterization Berea sandstone drilling operation tight sandstone fracture toughness evaluation utilization...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2125
... was tested. Experimental results indicated that shale samples perpendicular to bedding exhibited higher strength and rougher fracture surface, resulting in higher unpropped fracture conductivity than samples parallel to bedding. There was not a strong positive relationship between displacement and unpropped...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2147
... of applicability of ubiquitous joint models and when they fall short of capturing the correct deformation behaviour. The paper will show that ubiquity does not equate to continuity and that ubiquitous joint models are not able to capture the correct behaviour for discontinuities of large extent, such as bedding...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2179
... reservoir geomechanics Upstream Oil & Gas pore pressure change ductile behavior wellbore integrity symmetry plane shale barrier shale Wellbore Design bedding Skempton axial stress failure mode Pierre shale Skempton coefficient deformation coefficient undrained triaxial test peak axial...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-884
..., strain softening along the bedding planes, and creep of the shaley rock under compressive stresses. Finite Element Analysis (FEA) was performed to simulate the excavation sequence and analyze the rock behavior observed during excavation. To address concerns regarding long term stability of the cavern...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-262
... geomechanics displacement plane mechanical property orientation damage zone experiment rotation host rock deformation moduli Reservoir Characterization fault core laboratory bedding fracture Fault Zone deformation anisotropy 1. INTRODUCTION Fault zones are commonly described as composed...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1300
... to bedding directions and the correspondent changes in pore pressure in the specimen are recorded. This has lead to interesting observations on the connections between the directional-dependent solid and bulk response of rock. Reservoir Characterization compressibility back pressure bedding pore...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0627
... ABSTRACT: Nanoindentation can measure the mechanical properties of samples with very small size. In this study, nanoindentation tests were performed on core samples from Middle Bakken Formation. Bedding directions were marked, and nanoindentation tests measured properties of samples parallel...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0917
... cored parallel and the other normal to the bedding. Results indicate a significant increase in the creep rate due to increasing the temperature. It is also observed that the sample cored parallel to the bedding exhibits higher stiffness and a lower creep strain rate compared to the one cored normal...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0008
... of legacy data sets as well as the designing of better informed geomechanical testing programs in core analysis. Louis sandstone reservoir geomechanics axial stress stress tensor Reservoir Characterization strength intergranular contact mechanical anisotropy bedding rothbach sandstone...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0108
... ABSTRACT: This paper presents the theoretical formulation and numerical implementation of an anisotropic damage model for materials with intrinsic transverse isotropy, e.g. sedimentary rocks with a bedding plane. The direction dependent mechanical response is captured by utilizing four types...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0468
... ABSTRACT: In this paper, we report on a scoping study that was prompted by operational issues through an Oligocene smectite-rich shale that involved changes in borehole inclination with respect to the bedding. A core characterization workflow is used to specifically probe geomechanical...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0182
... microtomography imaging confirm that bedding planes and pre-existing fractures act as planes of weakness, while sample layering causes mechanical stratigraphy, where changes in lithology may cause fractures to reorient. Results highlight the limitations of tangent linear elasticity moduli to explain complex...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0387
... was conducted on specimens cored from blocks of coquina. Core samples with diameters of 50.8 mm, 70 mm and 94.6 mm were obtained both perpendicular and parallel to bedding. Seventy-five specimens were tested. Results indicate there is variability between tensile strength of specimens obtained from different...

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