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Keywords: stiffness
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Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-543
... Reservoir Characterization experimental observation shale SINTEF Petroleum Research stiffness s-wave velocity frequency free water Velocity Dispersion rock physics model physics model Upstream Oil & Gas transition porosity shear moduli clay mineral experiment dispersion...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-639
... (e.g. in the rock properties and formation stiffness contrasts) and reservoir dynamics modeling (e.g. undepleted pockets and activity of waterdrive) become much better traceable. The rock properties and the pressure distributions were then iteratively calibrated and harmonized with the measured 4D...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-544
... strength epoxy glass weight ratio glass bead laboratory experiment numerical model stiffness ARMA/NARMS 04-544 Estimation of Intergranular Bond Strengths by Core Scratching: A Comparison between a Laboratory Experiment and a Numerical Discrete Particle Simulation Larsen, I. SINTEF Petroleum...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0409
... boreholes reveal that the average coal stress increases with the average rock stress. Upstream Oil & Gas seam Thickness Coal Basin MPa database stress difference tectonic stress Reservoir Characterization coal horizontal stress sequence seam thickness stiffness Rock stress minimum...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0137
... in pressure can be written (Gutierrez and Hansteen, 1994): 8.p (Cf+ Ml> + L1K1L r l (-tY<l>p" Q + LTKI LiF) (12) where L is the solid-fluid coupling matrix, K is the global stiffness matrix (i.e. constitutive model for the deformation of the reservoir and overburden, underburden, and sideburden), and LJF...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0641
... and after the grouting injection. As a result, it is found that the shear moduli of the injection area are increased up to 20%. Also, investigated in this paper is the numerical analysis scheme to quantify the reinforcement effect. For this, a permeation grouting theory is assumed and the joint stiffnesses...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0651
..., it is considered that the me- chanical behavior of rock joints consists of three parameters, namely, normal stiffness kn, shear stiffness ks, and the dilatancy property. The goals of this research work are to determine these three parameters, to develop a constitutive law for rock joints, and to apply the field...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0197
... by the inverse of frac- ture stiffness. The fracture stiffness is a constant during wave transmission across fractures. While in the nonlinear model, the normal deformation of fractures is a hyperbolic function of normal stress. The fracture stiffness changes with the seismic stress during wave transmission...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-1217
... Characterization Upstream Oil &amp; Gas Simulation reservoir geomechanics strength core analysis axial strain sandstone loading stiffness particle compaction stress release bond strength experiment laboratory laboratory experiment stress level size effect synthetic sandstone damage effect...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0945
... displacement fracture shear displacement repository Yucca Mountain fracture displacement drift stability stiffness fracture friction angle ABSTRACT ABSTRACT: The rock mass of the proposed geological repository for high-level radioactive waste at Yucca Mountain (YM), Nevada, is highly fractured...
Proceedings Papers

Paper presented at the 2nd North American Rock Mechanics Symposium, June 19–21, 1996
Paper Number: ARMA-96-1959
... behaviour fracture simple granular model evolution anisotropy numerical experiment displacement gradient tensor stiffness Rock Mechanics, Auberttn, Hassam & M tn (eds) ¸ 1996 Balkema, Rotterdam. ISBN 90 5410 838 X The constitutive behaviour of a simple granular model as determined from numerical...
Proceedings Papers

Paper presented at the 2nd North American Rock Mechanics Symposium, June 19–21, 1996
Paper Number: ARMA-96-1919
... NGI's version of UDEC (see UDEC Manual 2.02), which is called UDEC-BB (BB refers to the Barton- Bandis joint model), contains the following special features. ß hyperbolic joint normal closure function, (which means that the joint stiffness increases with increasing closure); ß closure limit (joints...
Proceedings Papers

Paper presented at the 2nd North American Rock Mechanics Symposium, June 19–21, 1996
Paper Number: ARMA-96-1169
... condition of the fracture (Pyrak-Nolte et al., 1992; Roy &amp; Pyrak-Nolte, 1995; Ekern et al., 1995). For instance, the velocity of interface waves depends on the specific stiffness of the fracture. For a rock undergoing failure, where the micro-cracks are orient along a plane, the stiffness of this plane...
Proceedings Papers

Paper presented at the 2nd North American Rock Mechanics Symposium, June 19–21, 1996
Paper Number: ARMA-96-1667
...-backfill under confinement and evaluates the post-failure behaviour of pillars. The relationship between the residual strength of pillars as a function of stiffness of confining fill material indicates that the residual strength progressively increases with increasing cement content in backfill...
Proceedings Papers

Paper presented at the 2nd North American Rock Mechanics Symposium, June 19–21, 1996
Paper Number: ARMA-96-1887
... is governed by the local mine stiffness stability criterion. To apply this stability criterion, a boundary-element-method computer program with a strain-softening material model calculates the local mine stiffness and the post-failure pillar stiffness. The behavior of computer simulations changes depending...
Proceedings Papers

Paper presented at the 2nd North American Rock Mechanics Symposium, June 19–21, 1996
Paper Number: ARMA-96-1937
... definite (Bazant, 1986). Upstream Oil &amp; Gas particle compression test isotropic stress Reservoir Characterization strength Potyondy element method circular particle assembly granite stiffness reservoir geomechanics modeling peak strength Cundall fracture Itasca Consulting Group...
Proceedings Papers

Paper presented at the 1st North American Rock Mechanics Symposium, June 1–3, 1994
Paper Number: ARMA-1994-0139
... is reflected and part transmitted. The transmission coefficient is a function of the stiffness of the displacement discontinuity (the joint stiffness), the frequency of the elastic wave, and the acoustic impedance of the host material. While the displacement discontinuity appears to fit experimental data quite...
Proceedings Papers

Paper presented at the 1st North American Rock Mechanics Symposium, June 1–3, 1994
Paper Number: ARMA-1994-0497
... under high strain amplitude waves. Upstream Oil &amp; Gas microcrack Reservoir Characterization axial stress Berea sandstone frictional pulse transmission test pore Poisson stiffness uniaxial strain test moduli strain amplitude minor stress cycle major stress cycle stress cycle...
Proceedings Papers

Paper presented at the 1st North American Rock Mechanics Symposium, June 1–3, 1994
Paper Number: ARMA-1994-1137
.... remediation displacement Reservoir Characterization siphon rock slope remediation project universal distinct element code Belden Siphon land reclamation discrete element modeling discontinuous deformation analysis Anchor verification limit equilibrium analysis failure mechanism stiffness...
Proceedings Papers

Paper presented at the 1st North American Rock Mechanics Symposium, June 1–3, 1994
Paper Number: ARMA-1994-0961
... surface pretension dynamic loading shank stiffness free surface Anchor numerical model Reservoir Characterization Simulation field trial bolt element dynamic strain head connection Rock Mechanics, Nelson & Laubach (eds) © 1994 Balkema, Rotterdam, ISBN 90 54103808 Rockholt behaviour under...

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