Well Integrity incident Location Well type Installation Date

Well Integrity incident Location: Well type: Installation: Date: Block xx/xx on NCS Production / Injection Platform / Subsea dd. mm. yyyy Course of events: • Describe in bullet format the course of events Critical Issues: • Describe in bullet format the critical issues Lessons Learned: • Describe in bullet format the lessons learned Classification: Actual or potential? • x Well integrity incident category: Level 1 Level 2 Level 3 Illustration/well bore schematic Level 4

Matrix for categorization and classification of well incidents For wells in operation/production SERIOUSNESS LEVEL Rate and amount Guidance 1. Rate > 10 kg/s or amount of > 100 kg HC gas - Barrier failure with major HC immediate release to external environment. Volume > 500 m 3 crude - Crossflow with major release to external environment. 2. Rate 1 -10 kg/s or amount of 10 -100 kg HC gas - Critical threat to installation immediate release and personnel. LEVEL 1 – Red: Critical well integrity incidents with high risk for personnel, environment and facility Volume > 50 m 3 crude - Barrier failure with HC release to external environment. LEVEL 2 – Yellow: Serious well integrity incidents '- External leak from well resulting in mobilization of emergency preparedness team. - Crossflow with release to 1. Rate 0, 1 -1 kg/s or amount external environment. of 1 -10 kg HC gas immediate - Serious threat to installation release and personnel. Volume > 1 m 3 crude oil - External leak from well resulting in mobilization of emergency preparedness team.

Matrix for categorization and classification of well incidents For wells in operation/production 1. Rate 0, 006 - 0. 1 kg/s or amount < 1 kg HC gas immediate release LEVEL 3 – Green: Medium well integrity incidents Spill volume > 0. 01 m 3 crude oil leak to external environment - Crossflow with potential of HC release to external environment. - Potential threat to installation and personnel. 2. Dual barrier failure - no loss of containment to external environment. LEVEL 4 – Minor well integrity incidents: - Barrier failure with limited HC release to external environment. 1. Rate < 0. 006 kg/s (API RP 14 B) or amount 0 -1 kg HC immediate release to external environment - Negligible threat to installation and personnel. 2. Single barrier failure - no loss of containment. Tan = Alert to PSA according to management regulation § 29 Blue = Notification to PSA according to management regulation § 29 Grey = Alert or Notification to PSA not required