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

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Threats From Improperly Abandoned Wells• Contaminated surface water entry (minerals,bacteria, waste, etc.).• Surface leakage from shallow zones throughwell or leaking cement sheath.• Leakage form an aquifer to surface.• Leakage from surface to an aquifer.• Danger of open well to surface egress (fallingdown the well).3/14/2009 10George E. King EngineeringGEKEngineering.com
Materials Used in Abandonment• Cement slurries.• Gelled pills (bentonite and others).• Spacers to protect cement slurries.• Mechanical plugs (incl. cement retainers).• Inflatable plugs.• Sand plugs (as base for cement).3/14/2009 11George 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: Requirements• Plug thickness (hei
Page 13 and 14: Cement Plugs• Cement slurry desig
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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