Cost-effective re-abandonment of legacy wells is essential to the success of offshore carbon capture and storage (CCS) projects, but re-entry poses a significant challenge, particularly when wells have been severed below the mudline. The complete paper discusses the challenges of accurately locating, and then successfully re-entering, these wells. The author writes that a key part of addressing these challenges is the innovative use of the recoverable abandonment frame (RAF).
Finding the Well: Locating Subsurface Legacy Infrastructure
Successfully locating a legacy well often is a complex and uncertain task, particularly for wells that were fully severed below the mudline with imprecise historical positioning data. Early technologies had significant accuracy limitations.
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