API 90:2006

1 GENERAL
   1.1 Scope
   1.2 Organization
   1.3 Definitions
   1.4 Referenced Documents
2 SOURCE OF PRESSURE
   2.1 Thermally Induced Pressure
   2.2 Operator-Imposed Pressure
   2.3 Sustained Casing Pressure (SCP)
   2.4 Monitoring
   2.5 Diagnostic Testing
3 ANNULAR CASING PRESSURE MANAGEMENT PROGRAM
4 MAXIMUM ALLOWABLE WELLHEAD OPERATING PRESSURE (MAWOP)
5 FIXED PLATFORM WELLS
   5.1 System Overview
   5.2 Methods and Frequency of Monitoring Annular Casing Pressure
   5.3 Detection of Pressure
   5.4 Annular Casing Pressure Evaluation Tests
6 SUBSEA WELLS
   6.1 System Overview
   6.2 Design Considerations
   6.3 Methods and Frequency of Monitoring Annular Casing Pressure
   6.4 Detection of Pressure
   6.5 Annular Casing Pressure Evaluation Tests
7 HYBRID WELLS
   7.1 System Overview
   7.2 Design Considerations
   7.3 Methods and Frequency of Monitoring Annular Casing and
        Production Riser Pressure
   7.4 Detection of Pressure
   7.5 Annular Pressure Evaluation Tests
8 MUDLINE SUSPENSION WELLS
   8.1 System Overview
   8.2 Design Considerations
   8.3 Monitoring, Pressure Detection, Annular Pressure
        Evaluation Testing and Analysis
9 DOCUMENTATION
   9.1 Annular Pressure Management Plan
   9.2 Monitoring Records
   9.3 Diagnostic Test Records
   9.4 MAWOP
10 RISK ANALYSIS CONSIDERATIONS
   10.1 Risk Assessment Techniques
   10.2 Hazard Scenarios
   10.3 Consequence Considerations
   10.4 Risk References
11 APPENDIX A - ANNULAR PRESSURE MANAGEMENT FLOWCHARTS
   AND EXAMPLES
   11.1 Fixed Platform Wells
   11.2 Subsea Well
   11.3 Hybrid Well
12 APPENDIX B - EXAMPLE MAWOP CALCULATIONS
   12.1 Definition:
   12.2 Fixed Platform Wells: MAWOP
   12.3 Subsea Wells: MAWOP
   12.4 Hybrid Wells: MAWOP
   12.5 Mudline Suspension Wells
13 APPENDIX C - WELLBORE SKETCHES
   13.1 Fixed Platform Wells
   13.2 Subsea Wells
   13.3 Hybrid Wells
   13.4 Mudline Suspension Wells
14 APPENDIX D - PRESSURE CONTAINMENT AND LEAK PATH
   CONSIDERATIONS IN WELL DESIGN
   14.1 Casing and Cement

Covers monitoring, diagnostic testing, the establishment of a maximum allowable wellhead operating pressure (MAWOP) and documentation of annular casing pressure for the various types of wells that occur offshore.