Report
Report - Montara investigation: Volume two
Report - Montara investigation: Volume two
- NOPSEMA
- Report
- Hydrocarbon ReleaseIncident InvestigationProcess SafetyStructural and Asset Integrity
- Barrier managementHydrocarbon releaseRisk managementWell controlWell integrity
- DrillingPressure testingWell intervention
- Blowout preventerValve
- Management of changeOperating and work proceduresRisk assessmentWell-barrier testing
- Upstream oil and gas
- Offshore installation
Summary
The second volume of an expert witness investigation examines nine issues surrounding the Montara hydrocarbon release. It assesses cement volumes, slurry properties, over-displacement, casing-shoe testing and corrosion-cap handling. Documentary analysis considers well suspension, barrier adequacy and programme changes, with proposed improvements to verification, contingency procedures and risk assessment.
Classifications: Barrier management; safety barrier management.
Classifications: Hydrocarbon release; hydrocarbon leak; oil and gas release.
Classifications: Risk management; risk evaluation.
Classifications: Well control; kick control; loss of well control.
Classifications: Well integrity; well life cycle integrity.
Classifications: Drilling; well drilling.
Classifications: Pressure testing; hydrostatic testing; pneumatic testing.
Classifications: Well intervention; workover; well servicing.
Classifications: Blowout preventer; BOP; blow-out preventer.
Classifications: Valve; valves.
Classifications: Management of change; MOC; change management.
Classifications: Operating and work procedures.
Classifications: Risk assessment; hazard assessment.
Classifications: Well-barrier testing; well barrier verification.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Offshore installation; offshore platform; offshore rig.
Summary
Analyses nine identified failures involving cementing, barriers, corrosion caps and pressure containment during the Montara event.
Themes: hydrocarbon release, incident investigation, process safety, structural and asset integrity.