Page 9: of Offshore Engineer Magazine (Jul/Aug 2020)

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LEADING OFF Well Integrity ment. In the second well the leak signature was more subtle. rod. Compared with onshore data acquisition in the US, FLI

After FLI’s initial three-hour run, a second probe was launched could offer up to 75% cost savings or, dependent on the appli- to validate and verify the acoustic signatures from the ?rst sur- cation, up to 90% in the offshore environment. vey and this identi?ed the leak’s location within an hour. This is especially attractive for older, lower producing as-

The data also provided additional well insights and the rap- sets, likely to encounter more frequent integrity issues, and id results enabled more ef?cient and reliable decision-making for operators looking for a cost-effective alternative to tradi- to identify the best location for plug placement. tional surveillance.

FLI has been used to access deviated wells using a pump-

THE FUTURE IS FLI down method and Well-SENSE is currently developing its

While other ?bre-optic surveillance solutions are available, own in-well conveyance system. To date, the technology has unlike FLI, they are either embedded in the completion or supported more than 30 commercial projects globally, both encased in a protective intervention medium such as a carbon on and offshore.

Figure 1: FLI’s ?bre-optic surveillance is faster, more reliable Figure 2: FLI’s bare ?bre-optic line is run into the well, from surface and more accurate than single-point wireline logging. to total depth, from a spool contained within a sacri?cial probe.

Source: Well-SENSE

JULY/AUGUST 2020 OFFSHORE ENGINEER 9