Detecting and Understanding Deep Pitting

Application

During a routine inspection, an MFL tool reported a limiting defect of 80% wall loss. Since wall loss to this extent would require an expensive workover and significant downtime, the operator contacted DarkVision to validate these measurements and determine if the workover was necessary.

Results

DarkVision’s scan provided unprecedented characterization of pitting in this gas storage well. The operator was able to understand the root cause of the wall loss through the visuals provided. Even pitting within the collar was characterized, an area where other technologies would fall short due to the changing geometry. DarkVision determined that wall loss on the casing ID had a maximum penetration of 46%, which resulted in a burst pressure that fell within their safe operating range unlike the result from the MFL.