For a detailed description of the ISCWSA error model, please see Chapter 19 by Dr Andrew McGregor.
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- Introduction to Wellbore Positioning
- 1.0 Coordinate Systems and Geodesy
- 2. Changing from One Map System to Another
- 3. True North, Grid North, Convergence Summary & Exercises
- 4. The Earth’s Magnetic Field
- 5. Principles of MWD and Magnetic Spacing
- 6. In-Field Referencing
- 7. Survey Calculation Methods
- 8. Survey Frequency
- 9. Gyro Surveying
- 9.1 Background and History of Gyros
- 9.2 Oilfield Applications – A Brief History
- 9.3 Chronology of gyro development
- 9.4 Improving Performance and Service Capability
- 9.5 The Gyro Survey Process
- 9.6 ERD and Horizontal Transit
- 9.7 Ring Laser Gyro
- 9.8 Fibre Optic Gyro
- 9.9 Vibrating Structure Gyroscope
- 9.10 Coriolis Vibratory Gyros (CVG)
- 10. Basic Gyro Theory
- 13. Correcting for Magnetic Interference
- 14. Multi Station Analysis
- 15. Correcting for Pipe and Wireline Stretch
- 16. Human Error v Measurement Uncertainty
- 17. Understanding Error Models
- 18. The ISCWSA Error Model: Introduction
- 19. The ISCWSA Error Models: Explanation and Synthesis
- 20. Anti-collision Techniques
- 20.1 Minimum Separation Methods and Limits
- 20.2 Definition of Separation Factor
- 20.3 Separation Vector Method
- 20.4 Pedal Curve Method
- 20.5 Scalar (Expansion) Method
- 20.6 Probability of Collision
- 20.7 Acceptable Risk of Collision
- 20.8 A simplified Calculation of Probability of Collision
- 20.9 Anti-collision Scanning and Reporting
- 20.10 The Ellipse of Uncertainty Report
- 20.11 Safe Scanning Intervals
- 20.12 Travelling Cylinder Plot
- 20.13 Travelling Cylinder Options
- 20.14 Using TVD “Crop” Diagrams
- 20.15 Using Ladder Plots
- 21. Planning for Minimum Risk
- 22. Basic Data QC
- 23. Advanced Data QC
- 24. Tortuosity
- 25. Combined Surveys
- 26. Some Guidelines for Best Practice
- 27. Relief Well Drilling
- 28. Subsea Positioning
- 29. Wellbore survey quality control
- 30. Error model validation
- APPENDICES
- VERSION &SUBMISSION INFORMATION
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