Plug and Abandonment Basics - George E King Petroleum ...

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P & A Concerns•Knowledge of the well – where are plugs needed?•Perforations•Wear areas in the casing•Multilateral junctions•Overlap seal stability•Channels and fractures in cement sheath•Fracturing far out of zone (probably rare?)•Etc.•Placement accuracy and seal reliability of plugs.•Reliability of the cement sheath.•Reliability of the overall P&A system.3/14/2009 12George E. King EngineeringGEKEngineering.com
Cement Plugs• Cement slurry design.– Cement type and additives.• API class• Extenders, shrinkage, gas control, fluid loss control, formation andpipe adherence, spacers.• Volumes and excesses.• Placement method.– Location identification,– Depth control,– Spotting method (bailer, circulation, etc.),– Contamination control,– Testing requirements.3/14/2009 13George E. King EngineeringGEKEngineering.com
Page 1 and 2: Plug and Abandonment - Producing We
Page 3 and 4: Abandonment Types• P&A - plugged
Page 5 and 6: Well damage increases the P&A cost
Page 7 and 8: Legislative Drivers• Safe Water D
Page 9 and 10: Requirements• Plug thickness (hei
Page 11: Materials Used in Abandonment• Ce
Page 15 and 16: Setting a cement plug• Not as eas
Page 17 and 18: Cement Plug FailureMany cement plug
Page 19 and 20: Diverter Plug on End of TubingA sim
Page 21 and 22: Sand fall rates in various fluids10
Page 23 and 24: General Requirements• Onshore - 1
Page 25 and 26: Isolation of Open Hole• Cement Pl
Page 27 and 28: Isolation of lap joints or liner to
Page 29 and 30: Identifying Channels in Cement Shea
Page 31 and 32: Abandonment Gun Systems for Large C
Page 33 and 34: Testing of Plugs• Location of the
Page 35 and 36: Disclaimer• These slides are very
Page 37: References on Cement Channel Locati

Plug and Abandonment Basics - George E King Petroleum ...

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