WELL TEST HAZOPCAPABILITY STATEMENT

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• Hazard and Operability (HAZOP) is a hazard analysis method used to identify hazards and operational problems.

• The standard HAZOP methodology is process-based and may not cover all operational aspects of well testing. Surface well testing activities are typically more procedurally based and involves more manual intervention compared to process systems.

• ORS has developed a customized HAZOP approach for surface well test operations.

INTRODUCTION

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• Well testing is commonly considered as a high risk activity due to:

– Simultaneous operations (SIMOPS) inducing risks for conflicting activities

– Temporary equipment and piping brought onto the rig

– First time of bringing hydrocarbons to surface; well behaviour, composition

– Potential interface issues between temporary installations and permanent rig installations, e.g. power and utility supply, PSV settings on pumps and equipment, emergency access and escape paths

– Multiple parties involved in operations; rig personnel, crane operator and deck crew, well test crew, coiled tubing crew etc.

– Flaring activities; heat radiation, drop-out from burner / flare causing contamination of the environment.

RISKS INVOLVED WITH WELL TESTING

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• ORS has developed a customized HAZOP methodology to cover all aspects of well testing/well intervention activities with focus on:

– Identification of risks involved at all operational steps of the well test activity.

– Verification of primary and secondary barrier status and shutdown sequence at all steps of operation

– Equipment failure modes and preventive/mitigation measures in place

– Clarification of roles and responsibilities. Identification and risk assessment of potential SIMOPS

– Multidiscipline workshop to ensure communication between involved parties

– Familiarization of all parties with the risks involved at various steps of the operation

ORS APPROACH

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WELL TEST HAZOP METHODOLOGYWell Test project presentation

Select Well Test activity step or node

Select Hazardous Scenario/Guideword Select cause of hazard

Determine worst case consequencewithout control measures in place

Hazardousevent?

List preventive and mitagating controlmeasures and verify barrier status

Risk rank

Acceptable risk?

Othercauses?

Define recommendation(s) for furthercontrol measures or change in

design/procedure

scenarios?

OtherHazardousscenarios?

Determine action responsible

Yes

Yes

Yes

No

No

No

Yes

No

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Guidewords– Pressure (More, Less, Trapped)– Flow (More, Less, Reverse)– Temperature (More, Less)– SIMOPS– Instrumentation (Alarm settings, Trip points,

Tanks levels)– Leakages/Spill– Biohazard/Illness (H2S, Radioactivity)– Escape access– Flaring (Heat radiation, Drop-out)– Fire/Flammables– Dropped objects– Hand equipment (Personnel injuries)

EXAMPLES OF HAZARDS/GUIDEWORDS

Hazardous scenarios– Hydrate formation– Carry over– Slugging– Emulsions/Foaming– Gas blow by– Pipework Erosion– Rapid change of wind direction during flaring– Loss of power and/or hydraulics– Loss of utility systems– Unintentional initiation of safety functions– Extreme weather conditions– Human error (HMI)

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ORS has extensive experience in facilitating HAZOPs for well tests/well intervention activities. ORS offers systematic and structured HAZOP facilitation.

ORS CAPABILITIES

Planning Preparation Execution Review Reporting

Pre-meeting with client to define:

• Scope of Work• Nodes• Deliverables

Pre-meeting with client to define:

• Scope of Work• Nodes• Deliverables

Review of relevant documentation, presentation material

Review of relevant documentation, presentation material

• Interactive workshop

• Facilitation • Documentation

• Interactive workshop

• Facilitation • Documentation

Internal and client review of worksheets and identified actions

Internal and client review of worksheets and identified actions

• Draft report for client review

• Final report

• Draft report for client review

• Final report

Morten Nilstad Pettersen

mnp@orsconsulting.no

+47 97 73 17 80

Johan Tengelin

jte@orsconsulting.no

+46 72 300 90 70

For more information, please contact:

www.orsconsulting.no