Failure Analysis on Steel Tubing for Water Injection Well

Currently, all the water injection wells at Dulang Fields were completed with the carbon
steel tubing and it was found that the internal part of the tubing was badly corroded after
several years of installation. Based on the caliper/logging survey results, the internal
tubing wall has been developed with severe pits due to the metal loss problems. Also
the wells were suspected of having tubing leak that may cause from high penetration
point. The study was conducted on the analysis of material for steel tubing that caused
the failure and it was provided with the suggested solution. The failure analysis
methodologies were started with the data collection and sample selection, preliminary
examinations, nondestructive testing, macroscopic and microscopic examinations, and
analysis of metallographic specimens. Thus, from the study conducted, the durability of
this downhole tubing during the service life would be increased for the tubing integrity
as well as fulfill the safety requirements.