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TRIAGE - Pipeline Internal Corrosion Risk Assessment Model
- 1. TRIAGE Internal Corrosion Risk Assessment & Mitigation Guidance
- 2. TRIAGE Root Cause Model TRIAGE ALGORITHMS BASED UPON FORMAL FMEA ANALYSIS Failure Modes & Effects Analysis Root-Cause Analysis • Consideration of all Possible Contributing Factors • Creates Solutions more Likely to Prevent Corrosion • Considers Factors in Blind-Spot of Standard Industry Risk Assessment Methods
- 3. Root-Cause Analysis CONVENTIONAL APPROACH • Tendency to identify a single cause • Limits options for responding • Excludes viable solutions TRIAGE APPROACH • A systems solution • Considers complex interaction of a network of contributing factors • Improves ability to respond and to adjust to prevent future failures Conventional Approach TRIAGE Approach
- 4. Root-Cause Analysis CONVENTIONAL APPROACH Normally a single factor is assigned based upon observation of pipeline failure cut-out: • CO2 corrosion • Work-over Acid • Bacteria • Under-deposit corrosion TRIAGE APPROACH • Considers 40-year data patterns common to historical failures within AER databases to pin- point potential high risk well-pipeline combinations • Considers reservoir / drilling / production / pipeline network / upstream facilities / tankage / pumps • Characterizes over-life corrosive environment / changes to corrosive environment • Interaction of contributing factors • Reservoir classification / drilling method / acid stimulation / acid soak time / initial start-up fluid hydraulics / steady-state production / frequency on-off-on cycles / discontinuity in natural production decline / changes to water- cut / spatial relationship to historical failures with strong sibling association
- 5. Root-Cause of all Pipeline Failures 1. Corrosive environment was not fully understood 2. Activities to prevent corrosion were not appropriate to the corrosive environment 3. Corrosion damage was not identified and repaired prior to the failure event
- 6. Root-Cause of all Pipeline Failures 1. Corrosive environment was not fully understood 2. Activities to prevent corrosion were not appropriate to the corrosive environment 3. Corrosion damage was not identified and repaired prior to the failure event • Singular focus of 38-year career has been to create enhanced methods to characterize over-life corrosive conditions • Leader in integration of fluid hydraulics to characterize corrosion by produced fluids • Findings adopted as foundation of NACE – ICDA standards
- 7. Root-Cause of all Pipeline Failures 1. Corrosive environment was not fully understood 2. Activities to prevent corrosion were not appropriate to the corrosive environment 3. Corrosion damage was not identified and repaired prior to the failure event • Dedicated to delivering enhanced mitigation standards to field, operations teams to improve alignment of activities to risk
- 8. TRIAGE Pipeline Failure Event Tree – Internal Corrosion H2S Chloride No Dehydration Corrosive Water Oxygen Insufficient Corrosion Allowance No In-Line Inspection Susceptible Pipe CO2 Corrosion Damage Not Detected Corrosion Damage Active Internal Corrosive Corrodibles in Pipeline No Protection Electrolyte in Pipeline Condensed Water Produced Water Detrimental Flow Ineffective Inhibitor Performance Inhibitor Not Applied Insufficient Monitoring No Monitoring Inappropriate Monitoring Stagnant Water Accumulations Extended Non-Flow Condition Fugitive Fluids from Well Field OR AND AND AND AND AND Naturally Occurring Protective Scale H2S : CO2 Ratio Establishes the Nature of In-Situ Scale Formation Needs Confirmed
- 9. TRIAGE Response • Analyze all Alberta Pipelines as a Single Asset Model • Offer Optimized Mitigation Guidance to the Licensees • Prioritized Hierarchy of Options
- 11. Objective of TRIAGE – Respond to Root Causes • Incorporate innovative data pattern analytics & machine learning to enhance existing industry standard methods for classifying pipelines according to likelihood of corrosion failures • Corrosion by normal produced fluids • Accelerated corrosion attributed to detrimental upstream well hydraulics • Improve the ability of field, operations to align mitigation, inspection and monitoring activities and costs to actual pipeline condition & corrosion hazard conditions • Eliminate historical misallocation of chemicals onto low-risk pipelines • 25 – 40% savings
- 12. How does this fit into existing integrity & field, chemical teams ? • A Transformation from Compliance-is-Enough to Performance- Based Quality Management • An Owner-User Approach to Pipeline Integrity Management • SLMS
- 13. • TRIAGE anchors Quality Management System for pipeline integrity • Pin-point critical pipelines otherwise being over-looked • Identify implications of historical and present conditions to avoid missing critical pipelines that eventually may suffer a leak • Provide guidance for effective maintenance and inspection to assure the right actions are taken to stop existing corrosion from growing into a leak event, and to prevent new corrosion from initiating. An Owner-User Approach Performance Based Integrity Management
- 14. • Complement the work of existing integrity management & field chemical teams • Everybody does the work they have always been doing • Avoid being disruptive; • Fast validation and acceptance by field, operations An Owner-User Approach Performance Based Integrity Management
- 15. TRIAGE has Proven to Work • Improved Pipeline Performance • 40% Reduction in Direct Costs
- 16. • Stop ongoing misallocation of money towards pipelines never at threat of corrosion • Avert pipeline failures with 40% cost savings • Eliminate misallocation of corrosion inhibitors onto low risk pipelines • Rapid up-take by field, operations teams delivers immediate improvement in pipeline performance Aligning Activities to Actual Pipeline Conditions 8,000 Combined Operating Pipelines $8.0 million / year combined savings attributed to better alignment of corrosion inhibitor consumption with actual integrity hazard conditions Obsidian Bonavista Note – historical failure data is presented for pipelines presently owned by licensee Failure data is for pipelines in operating status at time of failure event
- 17. TRIAGE – Corrosion Triangle TRIAGE Data Pattern Analytics Standard Methods TRIAGE - Implementation Model TRIAGE – Corrosion Triangle TRIAGE Innovation Exceeds Industry Standard Methods
- 24. TRIAGE – Corrosion Likelihood Scoring Internal Corrosion
- 28. TRIAGE – Corrosion Likelihood Scoring External Corrosion
- 30. Likelihood – External Corrosion – 2 of 2
- 33. TRIAGE – Likelihood & Consequence Spatial Data Queries These are the spatial data queries that are necessary to support TRIAGE likelihood assessment and consequence scoring algorithms
- 34. TRIAGE – Spatial Data Queries
- 35. TRIAGE – Spatial Data Queries