Investigation Report
Hydrocarbon Release During Casing Cutting for Subsea Well Abandonment
09-29-2010 18:45 G17232 EB/164 Pollution - Other
- BSEE
- Investigation Report
- Unknown
- Environmental protectionHydrocarbon releaseWell integrity
- Well abandonmentWell intervention
- Wellhead
- Emergency responseEnergy and process isolation
- Upstream oil and gas
- Marine watersSubsea
Summary
Investigation of hydrocarbon leakage during abandonment of a temporarily abandoned subsea well in the Gulf of Mexico. Cutting casing strings released trapped annular gas and liquid hydrocarbons. The report describes spill response, a pollution dome, remedial cement plugging and subsequent clearance, and identifies primary casing cement as the only annular barriers.
Classifications: Environmental protection; environmental safety; pollution prevention.
Classifications: Hydrocarbon release; hydrocarbon leak; oil and gas release.
Classifications: Well integrity; well life cycle integrity.
Classifications: Well abandonment; plug and abandonment; P&A.
Classifications: Well intervention; workover; well servicing.
Classifications: Wellhead; well head.
Classifications: Emergency response; emergency preparedness.
Classifications: Energy and process isolation; isolation; energy isolation.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Marine waters.
Classifications: Subsea; underwater worksite.