Investigation Report
Equinor - Deepsea Bollsta - investigation of well control incident
Equinor - Deepsea Bollsta - investigation of well control incident
- Havtil
- Investigation Report
- Unknown
- Barrier managementExplosionHydrocarbon releaseWell controlWell integrity
- Well abandonment
- Blowout preventerGas detector
- Functional testingManagement of changeOperating and work proceduresVentilation
- Upstream oil and gas
- Offshore installation
Summary
Investigation of a gas release during permanent well abandonment on Deepsea Bollsta at Troll. Casing cutting released reservoir gas behind the casing, causing minor injury to one person and equipment damage. The report examines cement barriers, ultrasonic logging interpretation, BOP operation, gas detection, ventilation pressures and escape difficulties.
Classifications: Barrier management; safety barrier management.
Classifications: Explosion; explosive atmospheres.
Classifications: Hydrocarbon release; hydrocarbon leak; oil and gas release.
Classifications: Well control; kick control; loss of well control.
Classifications: Well integrity; well life cycle integrity.
Classifications: Well abandonment; plug and abandonment; P&A.
Classifications: Blowout preventer; BOP; blow-out preventer.
Classifications: Gas detector; gas monitor; gas detection instrument.
Classifications: Functional testing; function test.
Classifications: Management of change; MOC; change management.
Classifications: Operating and work procedures.
Classifications: Ventilation; forced ventilation.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Offshore installation; offshore platform; offshore rig.