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Keywords: axial stress
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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-04-541
... well control laboratory test Reservoir Characterization Berea sandstone total axial stress boundary condition pore pressure experiment Upstream Oil & Gas axial stress radial stress annular pressure drilling Engineering cylinder inversion poroelastic hollow cylinder hollow...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-583
... 1 which lists the grain size, the porosity , the bulk density , the UCS, the static and dynamic Young s moduli 50E , 50 dE and Poisson s ratios 50 , 50 d in unconfined tests at 50% of the peak stress, and the peak friction angle and peak cohesion c. The peak axial stress in all tests...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-611
... Reservoir Characterization wellbore integrity Upstream Oil & Gas plasticity compaction lochaline sand axial stress unconsolidated sand reservoir geomechanics Fluid Dynamics strength porosity Wellbore Design compressibility pore collapse stress path effective stress onset...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0173
... and a < L King (1966), Todd and Simmons (1972), Rice (1977) showed that pore pressure has a larger effect on changing the pore volume than the total volume that is defined by poroelastic coefficient, ~ > a. 173 p= I )(1 + When Kt,/Ks > [l/(l+<j ~ > a implies larger effect of pore pressure than confining pressure on pore volume. Tutuncu et al (1998) recently showed that fluid type and grain contacts have large influence on stress- strain behavior of rocks. They have conducted uni- axial stress cycling...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0625
... Reservoir Characterization strength rock bolt grouted bolt frictionally bolt interface borehole collar Upstream Oil &amp; Gas face plate shear strength displacement diameter shear stress structural geology axial stress pullout test rock mass loading point axial load interface...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-1217
... stress are simulated by a discrete particle model ( PFC - Particle Flow Code). The simulations confirm the physical understanding of core damage mechanisms, and also points further into how core damage effects may be quantified and corrected. drilling operation axial stress Reservoir...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-1073
...-plastic with an induced anisotropic damage. The material appears stiffer when calcite content increases, and when clay or water content decreases. Biot's coefficient decreases when axial stress increases and the material is able to swell. These phenomena can be explained at the microlevel. Finally, some...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0909
... ABSTRACT ABSTRACT: This paper investigates the post-failure relaxation behaviour of some typical hard rocks found in the South African gold mines. The laboratory study investigated the axial stress relaxation of failed quartzite and lava specimens under triaxial loading conditions when...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-1161
... was to experimentally examine the differences in the hollow cylinder behaviour under the two test conditions. The experimental results showed that considerable differences could be generated by the two conditions. The axial stress (intermediate principal stress, s 2 ) has a significant stiffening and strengthening...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-1307
... with experimental data, and thus provides an improvement over Chen's (1970) original formula. reservoir geomechanics axial stress prediction size effect cylinder rock strength normalized hoop axis Upstream Oil &amp; Gas formula alb 0 tensile stress Yuan Reservoir Characterization double-punch...
Proceedings Papers

Paper presented at the 2nd North American Rock Mechanics Symposium, June 19–21, 1996
Paper Number: ARMA-96-1113
... a wellbore or perforation in an isotropic rock subject to a cylindrically- symmetric stress state. It is semi-analytic because it must run quickly, to provide predictions for many depths in a single well. Completion Installation and Operations axial stress Wellbore Design TWC test radial stress...
Proceedings Papers

Paper presented at the 2nd North American Rock Mechanics Symposium, June 19–21, 1996
Paper Number: ARMA-96-1643
... permeabilities. Granites, in general, have an orthorhombic anisotropy due to their inherent microcrack fabric; and the Inada granite used in this study also has this kind of anisotropy. Fluid Dynamics microcrack specimen hydrostatic test permeability test axial stress axial strain compression test...
Proceedings Papers

Paper presented at the 1st North American Rock Mechanics Symposium, June 1–3, 1994
Paper Number: ARMA-1994-0497
... of granular rocks. Young's modulus and Poisson's ratio were calculated as a function of axial stress from static uniaxial strain and uniaxial stress tests. Dynamic Young's modulus were computed as a function of axial stress from compressional (P) and shear (S) wave velocities measured during the ultrasonic...

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