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Keywords: criterion
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Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1253
... and the fractures are introduced on the fly by splitting the nodes where and when needed. A linear Mohr-Coulomb criterion with tension cutoff is applied to the failure of edge based on the stresses estimated from its adjacent triangular elements. The Munjiza-NBS algorithm and Simple-Common-Plane contact algorithm...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-2164
... Hoek-Brown criterion is the most commonly applied strength model in the slope stability analysis. Hammah et al. [2] have outlined an approach for applying the Generalized Hoek-Brown criterion in SSR analysis. The advantage of FEM over LEM is the ability of this method to report stress-strain...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1054
... ABSTRACT: Longmaxi shale rock is a typical anisotropic rock, the most common used strength criterion is the single plane of weakness (SPW) criterion for wellbore stability analysis of anisotropic formations. However, is this SPW criterion the optimal strength criterion for Longmaxi shale rock...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1398
... control the whole creep system. There are 4 simple criteria and 2 composed criteria, which correspond to 6 scaling criterions. The numerical simulation results verify the accuracy of the scaling criterions. The study provides guidance to the salt cavern design and operation process in the term...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1815
... ABSTRACT: This paper focuses on a numerical study using the universal distinct element, to investigate settlement behavior of two strip footings with close spacing resting on a rock mass obeying the modified Hoek–Brown failure criterion. The perfectly rough strip footings are considered...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1449
... on sanding criteria emanating from filtration theories. One of many, is the volumetric sanding criterion which is widely used by the industry and the research community and it is based on a nebulous sand production coefficient λ with dimensions inverse length and with not a specific experimental test...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-2064
... recorded from emission sensors in the polyaxial tests. The results showed consistent results that could be used to refine the modeling approach and failure criterion that are used to make the maximum horizontal stress predictions. This study provided insight and validation for the thermal breakout stress...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1195
... ABSTRACT: This study proposes a novel approach to separate the effects of plastic shear and tensile yield through construction of a Kappa-Mu-Yield (KMY) universal cross-plot using Kaybob Duvernay source rock as the test case. A new fracability criterion is introduced and constructed from...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0029
... region of stratum and combining with the Mohr-Column failure criterion and rock tensile fracture criterion, the prediction model for fracture pressure in shallow stratum of deep water area is established. To verify the accuracy of the model, the pore pressure coefficient under the action of deviatoric...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0124
... of fracture propagation in rock salt are described and discussed. Upstream Oil & Gas rock salt investigation fracture length fracture initiation storage cavern hydraulic fracturing criterion vertical stress component numerical calculation natural gas storage calculation specimen zapf...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0022
...-based rockburst criteria (i.e., Loading System Stiffness (S)) are found to be more efficient than the stress-based rockburst criteria (i.e., Brittleness coefficient (B)). metals & mining criterion tendency Upstream Oil & Gas shaft station pillar reservoir geomechanics rockburst...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0087
... path true tri-axial experiment propagation fracture geometry criterion specimen hydraulic fracture wellbore 1. INTRODUCTION Unconventional oil and gas resources own a large part of the energy reserves in the world (Gao et al., 2014; Warpinski et al, 2009; Li et al., 2015). And the hydraulic...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0091
... ABSTRACT: The elastic models combined with the Mohr-Coulomb criterion are frequently used to assess the wellbore stability problem. However, the elastic models are generally too conservative to predict the minimum wellbore pressure. In addition, the Mohr-Coulomb criterion underestimates...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0241
... failure criterion mud weight window Upstream Oil & Gas criterion horizontal stress Drilling Zubair Formation southern iraq rock mechanical property breakout Magnitude 1. INTRODUCTION One of the most critical challenges affecting the drilling and production operations is wellbore...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0268
... data, Hoek-Brown criterion and well logging data, a comprehensive classification method was established to describe the characteristics of deep carbonate rocks. At first, the cores of a fractured carbonate reservoir with the vertical depth of 7350-7370m were used to carry out indoor unconfined...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0410
... with the theory have been compared by performing the same tests with finite element code PLAXIS 2D, thus confirming the model capability to simulate failure mechanisms within a strain localization regime. reservoir geomechanics criterion regime Sensitivity Study plastic strain Upstream Oil & Gas...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0481
... activities to minimize fault reactivation potential. reservoir geomechanics fault slip fluid pressure plot Upstream Oil & Gas shear stress Reservoir Characterization constant injection fluid injection joint-enriched finite element modeling enhanced recovery criterion MPa Simulation...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1540
... of the rock above the repository. Integrity is assessed against a dilatancy criterion and a fluid pressure criterion. Calculations indicate that barrier integrity of the bedded salt is locally and temporarily violated. However, a large region of the salt barrier is not affected. At any time, at least 300 m...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0495
.... Particularly in Enhanced Geothermal Systems (EGS) wells, high temperature and low permeability make the thermally induced failure become more prevalent. Incorporating temperature change, a simple compressive failure model based on Mohr-Coulomb failure criterion for inclined wellbores has been developed...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1862
... method in theory of elasticity. The pore pressure effect caused by fracturing fluid leak-off was simulated by adopting the dual porosity medium theory. The critical failure conditions of NF were determined by the maximum tensile criterion and the Barton-Bandis criterion. The sensitivity of the stability...

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