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1-20 of 33
Keywords: borehole breakout
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Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 57th U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2023
Paper Number: ARMA-2023-0270
... in the northern ZFTB. The seismologically determined local S Hmax direction from 25 focal mechanisms around the Balarud Lineament is 29.3°±8.5°. However, observations of borehole breakouts and tensile-induced fractures indicate that the dominant S Hmax orientation is N-S near the Balarud Lineament...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0272
... breakouts observed in borehole image logs. We utilize stress polygon (frictional faulting theory), wellbore failure analysis, drilling-induced fractures, and borehole breakouts to constrain the magnitude of the S Hmax in the well 78B-32 where both tensile and compressive failures occur. The constrained...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-2064
... horizontal stress) or occasionally observing existing compressive borehole breakouts (i.e., the maximum horizontal stress) that have occurred naturally from drilling. If there are no existing compressive breakouts in a borehole, the maximum horizontal in situ stress cannot be estimated with much confidence...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-2127
... ABSTRACT: Borehole breakout has always been a challenging problem in drilling, especially in fractured and weak formations. Natural fractures are an important factor that affects wellbore breakout, but the traditionally used bedding plane models are not sufficient to capture borehole breakout...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2058
... of the wellbore to study its effect on hoop stresses in the nearby region. drilling operation wellbore breakout borehole wellbore integrity modeling Reservoir Characterization wellbore geometry Upstream Oil & Gas borehole breakout diameter geometry cross-section Velocity distribution...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-434
... tests or implied from the regional tectonic setting. To date, borehole breakout analysis has provided some assistance for the orientation of the stress field, although very little has been done to correlate breakout with stress magnitude. This paper proposes a methodology of predicting stress from...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-619
... ABSTRACT: A novel experimental geometry is combined with acoustic emission monitoring capability to measure crack growth and damage accumulation during laboratory simulations of borehole breakout. Three different experiments are conducted in this study using Sierra White Granite. In the first...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0317
..., the coal commonly features low mechanical strength, remarkable brittleness and heterogeneity, frequently resulting in borehole instability issues during drilling, completion and production. In this present work, we developed a hydro-mechanical model to predict the borehole breakout and assess the stability...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0826
... ABSTRACT: Borehole breakout is one of the major wellbore instability problems in both vertical and deviated wells. It usually presents a time-dependent failure process consisting of initiation, propagation, and stabilization stages. Most previous numerical modeling studies of this problem...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0976
... ABSTRACT: Ensuring wellbore stability is of major importance during any well completion. Wellbore collapse as a result of severe borehole breakouts represents a major problem in many cases. In order to quantify the risk associated to wellbore collapse a reliable estimate of the collapse...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-099
... Upstream Oil & Gas Rock mechanics Reservoir Characterization fracture breakout slot-shaped breakout Wellbore Design compressive strength borehole breakout Test Point international journal aspect ratio principal stress ARMA 16-0099 Numerical analysis of borehole breakouts with size...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-244
... Abstract: Borehole breakouts, a series of complex processes that simultaneously affect the borehole wall, are characterized by initiation, propagation, and stabilization sequences. This paper presents a hydro-mechanical model incorporating plasticity strain softening by a Drucker-Prager...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-611
... of borehole breakout under monotonically increased far-field stress at reduced-scale are investigated using discrete element method (DEM). The micro-structure of Mancos shale is captured by explicitly representing the presence of weakness with a series of parallel smooth joint contacts. Square samples (50 mm...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-541
.... To analyze potential risk of shear activation along the faults, we characterize in situ stress state at the site. Borehole image logs showed borehole breakouts along the whole logged section to ~700 mbsf, which consistently indicate an average maximum horizontal principal stress (S Hmax ) direction of NW-SE...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-441
... and the analysis of borehole breakouts, are commonly used to estimate the in situ stress conditions. Significant research has focused on the stress path and damage around tunnels in order to predict damage and spalling behaviour, but little has been done to model the stress path around a borehole for the purpose...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-739
... are discussed, followed by suggested future work. constraint Reservoir Characterization orientation Upstream Oil & Gas stress magnitude regime Hmax fracture borehole breakout borehole Newark basin principal stress modeling co 2 breakout hmin reservoir geomechanics strength natural...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-447
... ABSTRACT: Borehole breakouts were commonly observed in the boreholes drilled in unconsolidated deepwater sediments near the Nankai Trough, SW Japan. The use of borehole breakouts enabled us to constrain in situ stress states. While it was straightforward to estimate the stress direction based...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-134
... ABSTRACT: This paper presents an ongoing study on the use of borehole breakouts to estimate in situ stresses at depth in a Canadian underground mine. The breakouts were identified using an acoustic televiewer (ATV) probe. Rock samples were tested in laboratory to determine their failure curve...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the The 42nd U.S. Rock Mechanics Symposium (USRMS), June 29–July 2, 2008
Paper Number: ARMA-08-158
...1. INTRODUCTION Borehole breakout in rock is induced by stress concentration on the surface of a borehole subjected to far-field stress. If this far-field stress is anisotropic, the highest stress concentration occurs on the surface in the minimum principal stress direction within the plane...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the The 42nd U.S. Rock Mechanics Symposium (USRMS), June 29–July 2, 2008
Paper Number: ARMA-08-229
... production monitoring borehole imaging strength Reservoir Characterization log analysis wellbore seismic borehole failure diameter imaging tool production control well logging Upstream Oil & Gas borehole breakout reservoir geomechanics Reservoir Surveillance borehole wall...
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