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Keywords: borehole breakout
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Proceedings Papers
Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-152
... ABSTRACT: Knowledge of the in situ stress state is critical for underground rock engineering projects, but direct measurement data are often not available. Although borehole breakouts are only indicative of the in situ stress state, they nevertheless represent a significant data resource...
Proceedings Papers
Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-178
... reservoir characterization upstream oil & gas orientation topography drilling-induced fracture structural geology norway overburden borehole axis magnitude fracture gradient norwegian university reservoir geomechanics perpendicular borehole breakout focal mechanism figure 4...
Proceedings Papers
Paper presented at the 13th ISRM International Congress of Rock Mechanics, May 10–13, 2015
Paper Number: ISRM-13CONGRESS-2015-237
...DETERMINING THE IN SITU STRESS WITH THERMALLY INDUCED BOREHOLE BREAKOUT *T. Siren1, J. Suikkanen1, E. Heikkinen2, J. Valli2, M. Hakala3 1Posiva Oy Olkiluoto Eurajoki, Finland (*Corresponding author: [email protected]) 2Pöyry Finland Oy Jaakonkatu 3 Vantaa, Finland 3KMS Hakala Oy Kehonranta 40...
Proceedings Papers
Paper presented at the 13th ISRM International Congress of Rock Mechanics, May 10–13, 2015
Paper Number: ISRM-13CONGRESS-2015-117
... Abstract Under high stress conditions, rock bursts, borehole breakouts, and spalling events are common phenomena that occur around underground openings. In general, together these three phenomena represent brittle failures of an intact rock mass; however, individually they reflect different...
Proceedings Papers
Paper presented at the 12th ISRM Congress, October 16–21, 2011
Paper Number: ISRM-12CONGRESS-2011-247
... to identify borehole breakouts. In this paper, a new multi-variable workflow is proposed for this purpose in correlation with some of the petrophysical logs in addition to mud weight and in-situ vertical stress data. This approach employs number of data processing techniques including Bayesian classification...
Proceedings Papers
Paper presented at the 11th ISRM Congress, July 9–13, 2007
Paper Number: ISRM-11CONGRESS-2007-272
... ABSTRACT: Drilling experiments under pre-existing true-triaxia l stress in an oil-producing limestone and several sandstones revealed three distinct modes of failure leading to borehole breakouts. The failure micromechanism in Austin Chalk limestone begins at the borehole wall, where two...
Proceedings Papers
Paper presented at the 11th ISRM Congress, July 9–13, 2007
Paper Number: ISRM-11CONGRESS-2007-265
... reservoir geomechanics Morelli pirsa weighted borehole breakout Reservoir Characterization reference result stress state Cooper Basin Upstream Oil & Gas borehole breakout Reynolds geothermal group orientation Adelaide distinct element model Australia zone size petroleum...
Proceedings Papers
Paper presented at the 11th ISRM Congress, July 9–13, 2007
Paper Number: ISRM-11CONGRESS-2007-059
... sedimentary rock is clarified. Furthermore the three-dimensional DEM simulation under the in-situ stress condition provides a successful result to examine the borehole breakout observed in the actual deep borehole in the soft sedimentary rock, and the applicability of the simulation to the actual field...
Proceedings Papers
Paper presented at the 9th ISRM Congress, August 25–28, 1999
Paper Number: ISRM-9CONGRESS-1999-089
.../tanqlr,RT 'Yo 82 HTIRT-Ratio I % 0 TCT,RT ,n,longtime 'PI deg 33.5 c MN/m" 13.29 , I , 3 ROCK MECHANICALMODEllING The rock mechanical models should allow the simulation of the two major failure modes in deep wellbores: ' - boreholebreakouts - borehole frac Borehole breakouts (see Figure 5) are damages...
Proceedings Papers
Paper presented at the 8th ISRM Congress, September 25–29, 1995
Paper Number: ISRM-8CONGRESS-1995-107
... strength breakout initiation strength rockmass laboratory reservoir geomechanics Martin Herrick geometry Haimson rockmass system strength Upstream Oil & Gas borehole breakout peak strength tangential stress breakout slab excavation surface tunnel Rockmass strength determination...
Proceedings Papers
Paper presented at the 7th ISRM Congress, September 16–20, 1991
Paper Number: ISRM-7CONGRESS-1991-202
...A large borehole breakout? Ein groBer Bohrlochausbruch? Une rupture dans un sondage large? T.R.STACEY, Steffen, Robertson and Kirsten, Johannesburg, South Africa P.WTHOMPSON, De Beers Consolidated Mines Limited, Finsch Mine, South Africa , . ABSTRACT: The term "borehole breakout" is normally...
Proceedings Papers
Paper presented at the 7th ISRM Congress, September 16–20, 1991
Paper Number: ISRM-7CONGRESS-1991-298
... hydraulic fracturing size effect drilling method wellbore pressure management Upstream Oil & Gas borehole breakout reservoir geomechanics annular pressure drilling Proc borehole kutter experiment schilfsandstein stress level borehole wall thrust Reservoir Characterization...
Proceedings Papers
Paper presented at the 7th ISRM Congress, September 16–20, 1991
Paper Number: ISRM-7CONGRESS-1991-311
... for the measurement of the in situ stress, and borehole breakout size appears to be directly related to in situ stress magnitude. These two findings, although unrelated, constitute major advances in the general area of crustal stress determination at great depths. 2 HYDRAULIC FRACTURING IN INCLINED HOLES...
Proceedings Papers
Paper presented at the 7th ISRM Congress, September 16–20, 1991
Paper Number: ISRM-7CONGRESS-1991-306
... of investigations according borehole breakouts are used to support the stress measurements. The primary stress field seems to be the same all over the deposit. The greatest principal stress is orientated horizontally in direction NNW/ SSE up to a depth of 1100–1200 m. Beneath this the vertical stress component...
Proceedings Papers
Paper presented at the 7th ISRM Congress, September 16–20, 1991
Paper Number: ISRM-7CONGRESS-1991-302
.... The papers included in these proceedings give the reader an overview of current research relating to hydraulic fracturing, hydraulic tests, borehole breakout and borehole slotting techniques for stress measurement. New stress interpretation techniques are described and 1n situ stresses are presented...