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Keywords: excess pore pressure
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Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 1–4, 2023
Paper Number: OTC-32267-MS
... to PM4sand. The PM4Sand model was designed to estimate excess pore pressure generation due to earthquake shaking. It is not calibrated for static loading. As a result, the HSsmall model is used for calculating the initial stress field under static loading (i.e. gravity loading phase) and then switched...
Proceedings Papers
Colm O’Beirne, Phil Watson, Conleth O’Loughlin, David White, Alexander Hodson, Sze-Yu Ang, Sebastiaan Frankenmolen, Jesper Hoj-Hansen, Matthew Kuo, Toby Roe
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31064-MS
... are then installed onto the pipe in-flight, mimicking the use of PCMs to mitigate pipeline walking during operation. After installation of the PCMs, further axial cycles are applied, with the system settlement and changes in axial resistance and excess pore pressure measured. The paper shows the performance...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 2–5, 2016
Paper Number: OTC-27271-MS
... the calculation of: (i) seismic shear stress and excess pore pressures induced in the soil column during a seismic event; (ii) post-seismic foundation settlement, which can be a governing design criterion in carbonate sediments due to their compressibility; (iii) bearing capacity during the seismic event allowing...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 4–7, 2015
Paper Number: OTC-25978-MS
... under in-plane loading. interface mudmat centrifuge berm centrifuge testing settlement offshore technology conference design methodology artificial intelligence pipeline displacement piping design excess pore pressure plet foundation prototype scale upstream oil & gas...
Proceedings Papers
Andy Hill, Anant Prakash, Kevin Hampson, Thomas Gray, David Rushton, Brian Mackenzie, Alexander Puzrin
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 4–7, 2015
Paper Number: OTC-25988-MS
... deposit risk and uncertainty assessment risk management investigation subsea system ground model pore pressure excess pore pressure acg field risk assessment geotechnical borehole probability upstream oil & gas reservoir characterization interpretation conditioning factor landslide...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 5–8, 2014
Paper Number: OTC-25196-MS
... of buried, gas-charged sediment. Using shipboard seismic survey data from Finneidfjord, we illustrate how novel seismic data processing techniques can yield estimates of geotechnical properties of this gas-charged sediment: gas saturation (concentration) and excess pore pressure as well as their uncertainty...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 5–8, 2014
Paper Number: OTC-25398-MS
... assessments of the sliding resistance of carbonate soils. centrifuge australia undrained strength ratio excess pore pressure pore pressure friction carbonate soil friction angle strength axial resistance resistance dilatancy offshore technology conference consolidation displacement rate...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 6–9, 2013
Paper Number: OTC-24154-MS
... been deployed at several offshore sites and valuable data has been collected. This paper presents some results and observations from recent testing offshore West Africa and focuses mainly on (i) the vertical pipe penetration tests, (ii) the dissipation of excess pore pressures generated during vertical...
Proceedings Papers
David White, David A.S. Bruton, Malcolm Bolton, Andrew John Hill, Jean-Christophe Ballard, Thomas Langford
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 2–5, 2011
Paper Number: OTC-21249-MS
... friction factor model test excess pore pressure axial friction factor upstream oil & gas dissipation pore pressure equivalent friction factor axial resistance pipe-soil interaction residual value resistance pause period pore pressure ratio offshore pipeline displacement peak...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 3–6, 2010
Paper Number: OTC-20554-MS
... clayey soils the usual rate of laying is such that the embedment response is undrained. Excess pore pressure is generated in response to the imposed weight of the pipeline, and due to shearing of the soil. The effective stress in the soil remains low, as it was in situ, until drainage occurs. After full...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 4–7, 2009
Paper Number: OTC-20096-MS
... the pipe was pushed at a constant rate to a specified embedment, then held under a specified load, whilst the excess pore pressure dissipated. An example of the vertical load-displacement response and the associated excess pore pressure measured at different locations around the pipe is shown in Figure 5a...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 5–8, 2008
Paper Number: OTC-19668-MS
... pore pressure gradient excess pore pressure offshore pipeline storm specific gravity pore pressure upstream oil & gas equation assessment otc 19668 backfill accumulation uplift resistance resistance offshore technology conference pipeline flotation OTC 19668 Pipeline...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 30–May 3, 2007
Paper Number: OTC-18532-MS
... deformation of the dissolution of the gas hydrate at the top of the GHOZ remains neglected. In this study, we quantify and compare the excess pore pressure resulting from gas hydrate dissociation and dissolution. Based on theoretical development it is demonstrated that excess pore pressure and shear...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 30–May 3, 2007
Paper Number: OTC-18706-MS
... both. operational safety borehole hydraulic standpipe upstream oil & gas pore pressure installation instrument reservoir geomechanics standpipe sensor pore pressure measurement pressure measurement gas trap excess pore pressure instrument package piezometer string piezometer...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 30–May 3, 2007
Paper Number: OTC-18720-MS
... are sediment types and the presence of excess pore pressure. Both are functions of geological setting and depositional regime and history. Two important causes of excess pore pressure in the uppermost sediment layers are high sedimentation rates combined with unfavourable layering, and the trapping...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 30–May 3, 2007
Paper Number: OTC-18911-MS
... effects that could make a submarine slope unstable and trigger a slide. In the assessment of seismic stability of a submarine slope, three scenarios should be evaluated and analyzed: Failure occurs during the earthquake. In this scenario, the excess pore pressures generated by the cyclic stresses...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 2–5, 2005
Paper Number: OTC-17444-MS
... escarpment seafloor reservoir characterization excess pore pressure shallow gas dolphin field structural geology normal fault slope failure trinidad sediment anticline northeast otc 17444 basin pore pressure upstream oil & gas interpretation instability stratigraphy...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 3–6, 2004
Paper Number: OTC-16161-MS
... 16161 3 34. In June 2001, the slurry was mixed to an initial water content of 150% and left to consolidate while monitoring excess pore pressure, dissipation, and settlement [21, 22]. Primary consolidation of the tank was complete by the end of February 2002, about eight months after mixing. Soil...
Proceedings Papers
Petter Bryn, Tore J. Kvalstad, Tom R. Guttormsen, Per A. Kjærnes, Jan K. Lund, Farrokh Nadim, Jørn Olsen
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 3–6, 2004
Paper Number: OTC-16560-MS
... from previous work (Ref.2). strength clay layer slide scar reservoir geomechanics failure probability risk and uncertainty assessment petroleum geology sediment annual probability consequence excess pore pressure slope stability marine clay probability earthquake headwall...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 5–8, 2003
Paper Number: OTC-15201-MS
... headscarp slope failure reservoir characterization artificial intelligence modeling pressure regime overpressure pore pressure measurement seafloor situ pore pressure measurement sigsbee escarpment excess pore pressure atlantis upstream oil & gas borehole horizon 25 pore...
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