Multi Barriers Metal Loss 5


Integrity Challenge

It is important to have a good cement bond in the annulus, for example by using a multistage packer and having adequate centralization. External coating on the inner pipe will lessen the risk of corrosion migration from the outer pipe to the inner pipe. This is especially key if the outer pipe has poor cement quality or no cement and is exposed to a corrosive aquifer. Multiple barrier failure can lead to catastrophic consequences such as an oil leak to surface which could result in damage to personnel, the environment, the asset and company reputation.

Corrosion Logging Result

One example when corrosion logging was done in a 3 barrier well (strings) and metal loss on both the casing strings were detected as shown below:


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