Field testing and verification of the characteristics of fiber-optic leak detection systems of oil and gas pipelines

Introduction. In this article, the problem of the efficiency of oil pipeline leak detection systems is addressed. Internal methods based on the analysis of transported product parameters are limited by point sensor distribution and difficulties in non-stationary operating modes. External methods, such as distributed optical fiber sensors, offer more reliable and accurate leak detection. Field tests are necessary to confirm their effectiveness, as laboratory methods cannot reproduce real operational conditions.

Aim. The aim of the work is to develop and validate a methodology for field testing to assess the efficiency of distributed optical fiber leak detection systems (LDS). The study includes testing PLDS based on the distributed acoustic sensor “Dunai” (DAS “Dunay”).

Materials and methods. The field test methodology involves simulating leaks using non-destructive control points. Test spills create pressure waves that are registered by the optical fiber cable. The methodology also accounts for external noise factors, such as vehicle movement, heavy machinery excavation, and non-stationary pipeline flow regimes.

Results. Field tests conducted using the proposed methodology confi rmed the suitability of the method for validating the claimed characteristics of leak detection systems. The tests involved the Distributed Acoustic Sensor “Dunay” (DAS “Dunay”) and demonstrated its ability to accurately detect and localize leaks with high precision and reliability.

Conclusion. The developed methodology can be used for further testing and certification of similar systems under real-world operating conditions.

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