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Keywords: rock strength
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Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1882
... control unstable perforation esf drawdown pressure condition produce sand-free sanding evaluation perforation well planning wellbore design fluid dynamics depletion rock strength load factor stress regime ARMA 21 1882 Analytical Sand Production Prediction and Sand Volume Estimation...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0204
... of rock strength were described first. Then, the new test method in which alternating loading rates and cyclic loading are combined was proposed to investigate the loading-rate dependence of a complete stress-strain curve from a single rock specimen. The test results of Tage tuff showed that the stress...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0305
... and then tested under different confining pressures and temperatures varying from 25°C to 175°C. By examining the thermally induced microcracks, stress-strain curves as well as the distribution of microcracks in the numerical specimen, the micro-mechanisms of rock strength variation can be interpreted...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0304
... block strength Reservoir Characterization Engineering rock mass strength veined rock mass rock mass bewick tensile strength metals & mining strength rock strength jointed rock mass rock mass condition 1. INTRODUCTION Recent experience in copper porphyry rock masses at depths below...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1911
... geomechanical characterization sedimentary texture sandstone porosity Taranaki Basin reservoir rock thrasher University rock strength lithofacies permeability grain size distribution geology 1. INTRODUCTION Around the world, extensive work has been undertaken to understand the geomechanical...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0491
... between basement component rocks. Fluid-weakening in deformation tests indicates chemo-mechanical processes may also contribute to subsurface deformation in Oklahoma. Upstream Oil & Gas wave velocity reservoir geomechanics Reservoir Characterization rock strength strength Westerly granite...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-851
... system Directional Drilling geomechanical model prediction horizontal stress Muderong Shale muderong formation Windalia shale pyrenee development area mud weight rock strength laboratory measurement lateral well ppg friction angle drilling campaign breakout 1. INTRODUCTION...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1155
... specimens were then simulated in FLAC. The results indicate that spatial correlation is a key factor that influences both the rock strength and the failure modes. The strength predicted by the model with stochastic approach with spatial correlation is larger than the model with completely random properties...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-363
... pillar strength equation. metals & mining esterhuizen rock strength pillar collapse Upstream Oil & Gas Iannacchione mountain structural geology strength discontinuity through-going discontinuity southwestern pennsylvania limestone pillar rock mass classification Reservoir...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-160
... of the following aspects: (i) sample preparation, (ii) destructivity, (iii) repeatability, (iv) resolution, (v) natural bias, (vi) sensitivity to sample size and, (vii) lithology dependence of the correlation between test results and rock strength. Discussions of these points are illustrated with examples from...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-218
... results suggests an underestimation of the dynamic rock strength; the effect of axial and circumferential inertia of the specimen didn’t manifest the strength value consistent with the physical observation. Therefore, a parameter called rock strength enhancement coefficient was introduced which increases...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0691
... strength profile correlation rock strength wireline log facies resolution scale strength profile rock mechanical test result continuous profile 1. INTRODUCTION Case studies for subsurface geomechanics offer many examples of the critical importance of reliable core data for the calibration...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0652
... is an expensive and time consuming process. It would be ideal if the strength of the intact rock could be estimated in the field as an in-situ measurement by running a device inside a borehole. Estimation of the rock strength by scratch tests has been reasonably accurate. Application of this concept...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0858
... scratch test standoff distance rock strength high temperature Drilling sample surface rock material 1. INTRODUCTION The exploitation of hydrocarbons and deep geothermal resources relies on finding cost-effective solutions to increase the drilling performance in hard crystalline rocks (Gill, 1983...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0125
... ABSTRACT: During excavation of rock tunnels or construction of underground openings, estimating and determining the intact rock strength is of vital importance. Theoretical and practical methods for estimating intact rock strength were developed during past rock engineering practices...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0080
... brittleness Cerchar abrasivity index neural network abrasiveness rock abrasiveness application neuron rock strength cerchar abrasion index Brazilian tensile strength uniaxial compressive strength rock sample tensile strength 1. INTRODUCTION In this research, artificial neural networks (ANN...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0255
... ABSTRACT: Current analytical methods to assess rock strength for borehole stability, stimulated volume calculations and fracture and faulting almost exclusively involve the use of the Mohr-Coulomb failure criteria, which does not account for the effect of the intermediate principal stress...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0246
... increases with distance from faults, similar to rock mass quality. reservoir geomechanics specific energy drilling operation concentration metals & mining median rock strength drill hole Reservoir Characterization Upstream Oil & Gas drilling depth frequency distribution specific...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0214
... into account by varying the material strength of the elements within the high strength zone and the fracture attributes within this zone. Results have shown that both the high rock strength of coal lithotype and low fracture intensity within this zone contribute to the decrease in seismic event counts...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-455
..., the current empirical calibration equations were developed from UCS data less than 40,000 psi, but the real range of strength was up to 58,000 psi. Therefore, equations should be updated with additional samples greater than 40,000 psi UCS to represent the wider range of rock strength from this Barnett core...

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