1887

Abstract

Summary

A disposable fibre optic deployment system was selected to conduct DAS and DTS leak detection data to inform a plug an abandonment campaign. The system consists of a downhole probe which deploys bare fibre as it is gravity deployed in the wellbore, with minimal surface hardware it was deployed to a remote location in a single passenger vehicle. Bare fibre was deployed in 2 remote land wells with temperatures of up to 200°C and sustained casing pressure was sequentially bled off to activate leak paths to surface. The survey identified 6 discrete integrity concerns indicating that reservoir pressure was connected to surface with no casing leaks identified. As a result, the abandonment plan was designed to focus on deep barrier restoration at the cap rock. The case study demonstrates the utility of DAS and DTS surveys for land well abandonment activities, using a disposable bare fibre optic system to reduce mobilisation footprint and cost.

© EAGE Publications BV
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/content/papers/10.3997/2214-4609.202475020
2024-08-14
2026-02-06

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References

  1. Carpenter, C.Study Reviews Two Decades of Surveillance Using Distributed Acoustic Sensing. Journal of Petroleum Technology75 (09): 54–57, 1 September 2023. https://doi.org/10.2118/0923-0054-JPT
     [Google Scholar]
  2. Crawford, R., Green, A., Lynch, P., Feherty, C.Disposable Fibre Optic Surveys Optimise Wells and Reduce CO2 Emissions in Unconventional Assets. SPE-217339. SPE Asia Pacific Unconventional Resources Symposium, 14–15 November 2023. https://doi.org/10.2118/217339-MS
     [Google Scholar]
  3. Feherty, C., Garioch, A., Green, A.Disposable Fibre Optic Intervention System: Case Study of Successful Leak Detection Offshore North Sea. SPE-205425. SPE Offshore Europe Conference & Exhibition, 7–10 September 2021. https://doi.org/10.2118/205425-MS
     [Google Scholar]
  4. Soroush, M., Mohammadtabar, M., Roostaei, M., Hosseini, S. A., Mahmoudi, M., Keough, D., Cheng, L., Moez, K., Vahidoddin, F.An Industry Overview of Downhole Monitoring Using Distributed Temperature Sensing: Fundamentals and Two Decades Deployment in Oil and Gas Industries. SPE Western Regional Meeting, Virtual, April 2021. https://doi.org/10.2118/200806-MS
     [Google Scholar]
/content/papers/10.3997/2214-4609.202475020
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Disposable Fibre Optic System: Two Hot Land Well Surveys Inform Plug and Abandonment Plan
Conference Proceedings 2024, 1 (2024); https://doi.org/10.3997/2214-4609.202475020
/content/papers/10.3997/2214-4609.202475020
/content/papers/10.3997/2214-4609.202475020
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