Product Overview

Summary: This Well Control and Blowout Prevention Safe Operating Procedure provides a clear, step-by-step framework for preventing, detecting, and responding to loss of well control in drilling and workover operations. It supports compliance with Australian WHS and petroleum safety requirements, helping protect workers, the environment, and assets from high‑consequence well control incidents.

Loss of well control and blowouts are among the most catastrophic events that can occur in petroleum drilling and well servicing operations. High‑pressure hydrocarbons, rapid escalation, and complex rig systems mean that even small deviations from safe practice can have severe consequences for workers, the environment, and business continuity. This Well Control and Blowout Prevention SOP translates technical well control principles into a practical, field‑ready procedure that standardises how crews prepare for, monitor, and respond to changing well conditions.

The document covers the full lifecycle of well control risk management, from pre‑spud planning, equipment verification and barrier integrity checks through to real‑time monitoring, kick detection, shut‑in procedures, and post‑incident reporting. It clarifies roles and responsibilities across operators, drilling contractors and service companies, ensuring everyone on site understands their part in maintaining primary, secondary and tertiary barriers. By implementing this SOP, organisations can demonstrate due diligence under Australian WHS legislation, reduce the likelihood and severity of well control events, and embed a strong safety culture across onshore and offshore operations.

This SOP is designed for Australian conditions and regulatory expectations, supporting alignment with petroleum safety case requirements, permit‑to‑work systems, and emergency response plans. It provides the structure needed to train new personnel, refresh experienced crews, and present a defensible, documented system of work to regulators, auditors and clients.

Key Benefits

• Reduce the risk of kicks, blowouts and uncontrolled releases through consistent well control practices.
• Ensure well control equipment is tested, maintained and operated in line with recognised Australian and international standards.
• Strengthen workforce competence by providing clear, step‑by‑step guidance for kick detection, shut‑in and circulation procedures.
• Demonstrate compliance with WHS laws, petroleum safety regulations and safety case commitments for drilling and well servicing operations.
• Improve emergency readiness by integrating well control response with site‑wide emergency management and communication protocols.

Who is this for?

• Drilling Supervisors
• Rig Managers
• Toolpushers
• Drillers and Assistant Drillers
• Wellsite Petroleum Engineers
• WHS Managers and HSE Advisors
• Onshore and Offshore Installation Managers (OIMs)
• Petroleum Operations Managers
• Contractor Company Men / Company Representatives
• Emergency Response Coordinators

Hazards Addressed

• Uncontrolled release of formation fluids (oil, gas, water) to the surface
• High‑pressure well kicks leading to blowouts
• Fire and explosion from hydrocarbon releases and gas clouds
• Exposure to hydrogen sulphide (H2S) and other toxic gases
• Structural damage to rig, wellhead and pressure control equipment
• Struck‑by and crush injuries from sudden equipment movement during well control events
• Environmental contamination from uncontrolled discharges
• Psychological stress and fatigue‑related errors during high‑pressure operations

Included Sections

• 1.0 Purpose, Scope and Application
• 2.0 Definitions and Key Well Control Concepts
• 3.0 Roles, Responsibilities and Competency Requirements
• 4.0 Regulatory and Standards Framework (Australian Context)
• 5.0 Well Planning, Risk Assessment and Barrier Philosophy
• 6.0 Well Control Equipment Requirements and Specifications
• 7.0 Pre‑Spud and Pre‑Job Checks, Inspections and Function Testing
• 8.0 Drilling Fluid Management and Primary Barrier Control
• 9.0 Kick Indicators, Detection and Monitoring Requirements
• 10.0 Immediate Response: Shut‑In Procedures for Different Operating Conditions
• 11.0 Well Kill Methods and Circulation Procedures (e.g. Driller’s Method, Wait and Weight)
• 12.0 Managed Pressure Drilling and Underbalanced Operations (if applicable)
• 13.0 Blowout Prevention Stack Operation, Testing and Maintenance
• 14.0 Secondary and Tertiary Well Control Measures (Diversion, Capping, Relief Wells – High‑Level Overview)
• 15.0 Communication Protocols and Chain of Command During Well Control Events
• 16.0 Integration with Site Emergency Response Plans and Evacuation Procedures
• 17.0 Permit‑to‑Work, Isolation and Lockout/Tagout Requirements
• 18.0 Training, Drills, Simulations and Competency Verification
• 19.0 Incident Reporting, Investigation and Corrective Actions
• 20.0 Documentation, Recordkeeping and Audit Requirements
• 21.0 Review, Continuous Improvement and SOP Revision History

Legislation & References

• Work Health and Safety Act 2011 (Cth) and equivalent state and territory WHS Acts
• Work Health and Safety (Mines and Petroleum Sites) Regulation 2014 (NSW) and equivalent petroleum regulations in other jurisdictions
• Offshore Petroleum and Greenhouse Gas Storage Act 2006 (Cth)
• Offshore Petroleum and Greenhouse Gas Storage (Safety) Regulations 2009 (Cth)
• Safe Work Australia – Model Code of Practice: Managing risks of hazardous chemicals in the workplace
• Safe Work Australia – Model Code of Practice: Managing noise and preventing hearing loss at work (relevant to drilling operations)
• AS/NZS ISO 31000:2018 Risk management – Guidelines
• AS/NZS 2865: Safe working in a confined space (for cellar decks, pits and enclosed areas around well control equipment)
• API Standard 53: Blowout Prevention Equipment Systems for Drilling Wells (commonly referenced industry standard)
• API Recommended Practice 59: Well Control Operations (commonly referenced industry guidance)