1-20 of 29
Keywords: borehole breakout
Close
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2058
... borehole borehole breakout pressure gradient geometry fluid dynamic stress direction elliptical geometry wellbore profile diameter cross-section Velocity distribution 1. INTRODUCTION Nowadays, as we are advancing in the harsh paradigms of oil and gas exploration, the problems related to...
Proceedings Papers

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

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

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

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

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...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-099
... effect borehole breakout international journal aspect ratio Rock mechanics slot-shaped breakout compressive strength Test Point Mining Science breakout shape breakout confinement borehole wall fracture principal stress 1. INTRODUCTION Stress-induced breakout, referred to as the cross...
Proceedings Papers

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

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-541
... 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

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-611
... 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

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-441
... 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

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-739
... locality are discussed, followed by suggested future work. Reservoir Characterization orientation borehole breakout constraint modeling Upstream Oil & Gas stress magnitude reservoir geomechanics strength natural fracture horizontal stress injection Magnitude regime Hmax fracture...
Proceedings Papers

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

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

Paper presented at the The 42nd U.S. Rock Mechanics Symposium (USRMS), June 29–July 2, 2008
Paper Number: ARMA-08-158
... ABSTRACT: Borehole breakout in rock is induced by stress concentration on the surface of a borehole subjected to far-field stresses. For investigating the formation of borehole breakout in the laboratory, polyaxial compression tests on a block sample and simpler, "hollow-cylinder" compression...
Proceedings Papers

Paper presented at the The 42nd U.S. Rock Mechanics Symposium (USRMS), June 29–July 2, 2008
Paper Number: ARMA-08-229
... possibilities for the origin of the observed features. 1. INTRODUCTION Numerous articles have been published on investigating borehole breakouts. These articles are mainly based on the elastic theory of material strength, which was first introduced by Kirsch in 1898 [1]. Borehole breakouts are considered very...
Proceedings Papers

Paper presented at the Golden Rocks 2006, The 41st U.S. Symposium on Rock Mechanics (USRMS), June 17–21, 2006
Paper Number: ARMA-06-1063
... Characterization strength brittle failure reservoir geomechanics CT image failure zone testing system failure process in-situ stress rock-like material polyaxial loading condition fracture borehole breakout differential stress breakout stress condition Upstream Oil & Gas Martin characteristic...
Proceedings Papers

Paper presented at the Golden Rocks 2006, The 41st U.S. Symposium on Rock Mechanics (USRMS), June 17–21, 2006
Paper Number: ARMA-06-1049
... present-day stresses within sedimentary basins commonly reveals significant and complex variations in the present-day stress orientation, both across basins and within fields. For example, borehole breakouts in the North German Basin and the Baram Delta province of Brunei (northwest Borneo) indicate broad...
Proceedings Papers

Paper presented at the Golden Rocks 2006, The 41st U.S. Symposium on Rock Mechanics (USRMS), June 17–21, 2006
Paper Number: ARMA-06-1157
... based approach remains the dominant and pragmatic tool in engineering practice, with notable progress being made in accounting for detailed features of borehole failure. Despite these advances, however, a number of fundamental difficulties remain in the modeling of borehole breakout. A frequent...
Proceedings Papers

Paper presented at the Golden Rocks 2006, The 41st U.S. Symposium on Rock Mechanics (USRMS), June 17–21, 2006
Paper Number: ARMA-06-939
... ABSTRACT: Previously borehole breakout and drilling induced tensile fracture data have been analysed to determine the state of stress in the Cooper-Eromanga Basin of South Australia. It has been shown there is considerable variability about a mean maximum principal stress direction of 101° N...

Product(s) added to cart

Close Modal