Shell – Optimum frequency to perform well integrity tests
Submitted by Shell
Impact
- Reduced planned losses associated with nominal fixed period well integrity testing frequency
- Increased level of assurance on well integrity
- Increased ability to pro-actively manage well integrity
Description of Best Practice
We have developed a method for deriving appropriate Christmas tree and downhole safety valve test frequencies using a statistical model. The model is based on actual historical valve integrity test data gathered in the field. Provided sufficient data is available, the method allows for test intervals to be set based on real and actual performance data (where available) and move away from fixed-term guidance in an appropriate and risk-based manner.
Contact: Wessel de Haas, Shell
