It is not simple to identify well ballooning because the well acts almost like well control situation (taking kick). Therefore, this topic describe how to identify well ballooning and important rules when you face with well ballooning situation.
These following guidelines will help you identify ballooning.
• Drilling mud losses – you must have mud loss into formation in order to have mud flow back when pumps off.
• Flow back when pump off and flow rate decrease over time – you must line the well up into a trip tank and monitor well. Tracking volume flow back every minutes help you understand if flow back trend decreases. The key thing is “flow back rate must reduce over time”. If not, you will have well control situation instead. Monitoring well takes time and personnel must be patient.