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:
All case studies
Multi Barrier Metal loss 4
Ensuring a strong cement bond in the annulus is crucial and one of the effective methods to achieve this is by utilizing a multistage packer and ensuring proper centralization.
Pipe’s Leak Detection
Drilling through zones with total losses can lead to poor cement quality or in severe cases a total absence of cement behind the casing.
Temperature Monitoring in Steam Injectors
Integrity issues in steam injection wells can have unforeseen impact on adjacent production wells.
Efficiency of Casing External Coating 2
It is important to have a good cement bond in the annulus, for example by using a multistage packer and having adequate centralization.
How to accurately measure the injection distribution profile behind the pipe. Some injection wells have been designed to inject via the tubing and the A annulus simultaneously.
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