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Keywords: wave propagation
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Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0138
... configuration Fontainebleau sandstone propagation Pazdniakou experimental data log analysis Fluid Dynamics dynamic permeability sandstone adler equation wave propagation mirror configuration permeability 1. INTRODUCTION Propagation of waves in porous media is an important topic in many areas...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0483
... ABSTRACT: The effect of joints on wave propagation in rocks has always been a matter of concern with regard to their transmission and attenuation characteristics. Experimental studies are conducted to analyze the wave attenuation characteristics in single and parallel fractures at varying...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0698
... primarily limited by computational efficiency. Reservoir Characterization spherical element Rock mechanics experiment Upstream Oil & Gas reservoir geomechanics Artificial Intelligence modeling holt sandstone wave propagation Simulation discrete particle modeling grain contact...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0820
... Characterization specimen strain measurement fracture frequency dissipation threshold ci threshold stiffness attenuation seismic wave mechanics propagation amplitude wave propagation transducer 1. INTRODUCTION The formation of extensile micro-fractures is associated with yielding of brittle rocks...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0636
... ABSTRACT: Numerical tools were developed which are able to address acoustic wave propagation in dry and saturated porous media. Lattice methods, namely the lattice Boltzmann method (LBM) and the lattice spring model (LSM), can be successfully used for this purpose. The resulting code can...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0386
... ABSTRACT: We examine P-wave propagation in a fractured medium using effective medium, explicit fractures, and localized effective medium representations of fracturing, to quantify their effectiveness. We model a published experiment with multiple parallel fractures. Initial models assume...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-393
... property amplitude Reservoir Characterization frequency Simulation excavation reservoir geomechanics strength History rock mass model fracture ejection rock fracture loading tensile strength wave propagation 1. INTRODUCTION In the last few decades there has been significant advancement...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-105
... Abstract: Simultaneous ultrasonic wave propagation and triaxial-stress testing are used to investigate the effects of fractures on the dynamic and static mechanical properties of clastic rocks under varying stress loading paths. The first case study explores the influence of pre-existing...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-651
... Abstract We present theoretical models and laboratory experiments for guided wave propagation within fluid-filled, open and partially open, and proppant-filled fractures. The laboratory experiments are conducted using an analogue fracture (a "trilayer" model) consisting of a pair of slender...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-169
... environments more accurately than before. First we perform verifications of P-wave propagation through a one-dimensional elastic bar and confirm DDA accuracy provided that the block length with respect to wave length is properly conditioned. We then test a newly developed radial P-wave propagation module...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-311
.... Through numerical examples the generalized anisotropic capabilities of the unified constitutive approach have been demonstrated and are presented in this paper. integration material axis upstream oil & gas matrix wave propagation composite triangle orientation element method formulation...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-382
... Abstract Steeply dipping fractures and horizontally oriented stylolites occur in carbonate reservoirs and lead to the formation of orthogonal fracture networks. Interpretation of elastic waves propagated through orthogonal fracture networks is complicated because of the potential existence...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-568
... and sparsely sampled; the geomechanical and geophysical properties of fractures are unknown and measured at the laboratory scale; and the spatiotemporal scale-disparity between the near source explosion physics and the far-field wave propagation physics requires considerable computing resources to simulate...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-496
.... INTRODUCTION Wave propagation through surface rock structures and their dynamic response are very complicated especially when the rock masses are regarded as discontinuous media containing various types of fractures (in the form of micro-cracks to faults). When a blast-induced shock wave propagates...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-154
... PROPAGATION rock mass Reservoir Characterization Thickness experimental study wave propagation stress equilibrium rock fracture Rock Mech deformation hydraulic fracturing transmission coefficient non-filled contact fracture fracture propagation 1. INTRODUCTION The presence of rock fractures...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-144
...1. INTRODUCTION Joints are important mechanical features of rock masses. When a wave propagates through a rock mass, the wave attenuation and slowness are mainly due to the presence of joints. A great number of studies have been performed on wave propagation across non-filled joints [1, 2]. Natural...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-467
... of blast waves in faulted rock masses. In order to investigate the effect of faults, a numerical simulation was conducted. The 2D distinct element code (UDEC) was used to model fault effect on rock failure and stress distribution through the rock mass due to blast wave propagation. The blast loading...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-585
... by the reflected channel waves. Wave propagation has been studied for several decades, but is still remains very difficult to identify the reflected channel waves effectively in a coal seam due to the rock-coal-rock structure. SH wave plays an important role in the rock-coal-rock structure, so this paper focuses...
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-10-161
... ABSTRACT: This study presents 2D and 3D simulations of nonlinear wave propagating through jointed rock masses. The simulations were performed using the Lagrangian hydrocode GEODYN-L with joints treated explicitly using an advanced contact algorithm. We studied both isotropic and anisotropic...
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-09-068
... Abstract Laboratory experiments were performed on cubic samples of aluminum and Austin Chalk to investigate the effect of fabricinduced anisotropy on the interpretation of fracture specific stiffness. Seismic data were analyzed using the displacement discontinuity theory for wave propagation...

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