Investigation Report
Synthetic Drilling Mud Pollution Following Casing Installation and Cementing
04-01-2015 13:30 G30926 KC 147 Pollution
- BSEE
- Investigation Report
- Unknown
- Environmental protectionLoss of containmentWell integrity
- DrillingPressure testing
- Stop-work authorityWell-barrier testing
- Upstream oil and gas
- Marine watersSubsea
Summary
BSEE investigates synthetic drilling-mud pollution at the Tiber #3 well in Keathley Canyon. The report traces casing installation, cementing, pressure tests and severe mud losses, identifying breakdown at the 22-inch casing shoe as the probable cause. It discusses possible contributing mechanisms, enforcement findings and a proposed district-notification condition for extreme losses.
Classifications: Environmental protection; environmental safety; pollution prevention.
Classifications: Loss of containment; containment loss.
Classifications: Well integrity; well life cycle integrity.
Classifications: Drilling; well drilling.
Classifications: Pressure testing; hydrostatic testing; pneumatic testing.
Classifications: Stop-work authority; stop work; stop-work intervention.
Classifications: Well-barrier testing; well barrier verification.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Marine waters.
Classifications: Subsea; underwater worksite.