Objectives
- Conduct a detailed revziew of wells
- Recommendations for P&A strategy
Method
- Conducted detailed review to identify the current well condition
- Qualitatively assessed relevant casing annular cementations
- Defined abandonment design issues
Challenges
- Hole in completion tubing, failed resin plug
- Inadequately abandoned sections, section milling requirements
- Sustained B-annulus pressure and recharge behaviour
- Cuttings re-injection into fracture network and impact on abandonment poorly understood.
- Potential leakage through fault zone
- Associated ERD considerations for P&A plan, i.e. increased torque, plug placement at high angle
Outcomes
- Detailed assessment of the technical issues
- Developed risk assessed and costed abandonment design options
- Recommendations for further work in a comprehensive document
