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Keywords: wellbore breakout
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Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2058
... wellbore to study its effect on hoop stresses in the nearby region. Wellbore Design Simulation wellbore integrity modeling wellbore geometry Reservoir Characterization Upstream Oil & Gas boundary condition hoop stress breakout velocity profile drilling operation wellbore breakout...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0826
... with overbalanced drilling mud pressure, the wellbore can have a final breakout shape that is much larger than the initial one due to seepage induced stress changes around the wellbore. The proposed models provide a useful tool for understanding and predicting time-dependent wellbore breakouts for...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-244
... also influenced by anisotropic in situ stresses and formation permeability. This proposed model provide a useful tool for evaluating the risk of wellbore breakout. Introduction A “borehole breakout” is a phenomenon in which portions of failing rock spalls from the wellbore wall due to high...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-445
... Upstream Oil & Gas wellbore breakout prediction coefficient prevent wellbore breakout Wellbore Design drilling operation overburden stress strength failure criterion mud weight horizontal stress West Kazakhstan field breakout numerical model wellbore stability analysis pore pressure...
Proceedings Papers

Paper presented at the 44th U.S. Rock Mechanics Symposium and 5th U.S.-Canada Rock Mechanics Symposium, June 27–30, 2010
Paper Number: ARMA-10-153
... gas FIELD Drilling reservoir geomechanics tensile fracture cx-565 well Wellbore Design mud weight orientation pore pressure China subsidence equation hmin wellbore integrity caliper data wellbore breakout rock strength breakout Magnitude 1. INTRODUCTION The Sichuan basin is a...
Proceedings Papers

Paper presented at the The 31st U.S. Symposium on Rock Mechanics (USRMS), June 18–20, 1990
Paper Number: ARMA-90-0841
... ABSTRACT: Data from the Cajon Pass (USA), KTB (West Germany), and Kola (USSR) scientific drillholes suggest that intrinsic strength anisotropy of crystalline rocks may be a major factor affecting wellbore breakout-derived orientation and magnitude of in situ stresses. Intrinsic strength...
Proceedings Papers

Paper presented at the The 30th U.S. Symposium on Rock Mechanics (USRMS), June 19–22, 1989
Paper Number: ARMA-89-0741
... geomechanics borehole borehole wall far-field stress Reservoir Characterization wellbore breakout horizontal stress intermediate principal stress Upstream Oil & Gas shear failure cross-section breakout spall geometry average value Zoback experimental breakout dimension in-situ stress...
Proceedings Papers

Paper presented at the The 30th U.S. Symposium on Rock Mechanics (USRMS), June 19–22, 1989
Paper Number: ARMA-89-0877
... maximum principal stress were first reported by Jones, et. al.[7]. Breakouts in the direction of the maximum horizontal principal stress have been observed in friable rocks (e.g., coal seams) only. This paper describes an analysis of wellbore breakouts for boreholes drilled in Alaska and Colorado. The...
Proceedings Papers

Paper presented at the The 30th U.S. Symposium on Rock Mechanics (USRMS), June 19–22, 1989
Paper Number: ARMA-89-0553
...-induced wellbore breakouts were used as indicators of the horizontal stress direction in another borehole. orientation situ stress measurement horizontal stress Reservoir Characterization wellbore breakout borehole united states stress field hydraulic fracture reservoir geomechanics Rock...

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