Oil and Gas Distributed Temperature Sensing (DTS)

Enhanced safety and improved production yields are all-important for land and subsea oil operations. With recent enhancements in performance and reliability for harsh environments, including high temperature, high pressure, hydrogen rich environments, OFS provides optical fiber solutions that are well-matched with the needs of DTS in the oil and gas industry.

Optical fibers can now move beyond the realm of data transport and function as direct, and fully distributed, sensors. For relatively short distance measurements (up to 15 km) Raman-based backscatter methods are commonly used for fiber interrogation. This enables well and pipeline operators to measure, in near real-time, an entire well bore or pipeline span with resolution of 1 meter or less.

For long distance DTS needs (up to 60 km), OFS offers a suite of single-mode optical fibers, optimized for the demanding environments found in oil and gas applications and tuned for compatibility with Brillouin backscatter interrogation equipment.

Part Number Fiber Type Coating System Interrogation Method H2 Diffusion Resistance Max. Temp.
F18961-02 graded-index 50/125 Carbon/Silicone/Acrylate Raman Better* 125 ˚C
F13469 Carbon/PYROCOAT® Better* 300 ˚C
BF05717 single-mode Carbon/PYROCOAT Brillouin Better* 300 ˚C
F21976 PYROCOAT Best* 300 ˚C

*In harsh environments, like those found in oil and gas applications, molecular hydrogen will diffuse from the environment, through virtually all materials, and nest in the core of the optical fiber. This build-up of hydrogen causes attenuation to increase, is highly variable, and affected by temperature, pressure, and hydrogen concentration. At OFS we continuously study methods for managing hydrogen diffusion and incorporate several techniques in the design of our optical fibers to improve performance and reliability in these harsh environments.


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