Temperature-dependent attenuation characteristics of fibers for distributed temperature sensing in hot geothermal wells

Thomas Reinsch; Jan Henninges

doi:10.1117/12.835384

5 October 2009 Temperature-dependent attenuation characteristics of fibers for distributed temperature sensing in hot geothermal wells

Thomas Reinsch, Jan Henninges

Author Affiliations +

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75036E (2009) https://doi.org/10.1117/12.835384
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

Abstract

This study was performed in order to select a proper fiber for the application of a distributed temperature sensing system within a hot geothermal well in Iceland. Therefore, commercially available high temperature fibers have been tested under in-situ temperature conditions. Experiments have been performed with four different polyimide coated fibers, a fiber with an aluminum coating and one with a gold coating. To select a fiber, the relationship between attenuation, temperature, and time has been analyzed together with SEM micrographs. On the basis of these experiments, polyimide fibers have been chosen for deployment. Further tests in ambient and inert atmosphere have been conducted with two polyimide coated fibers to choose a supplier and to set an operating temperature limit. SEM micrographs have been used to characterize the high temperature performance of the fibers. A novel cable design has been developed, a deployment strategy has been worked out and a suitable well for deployment has been selected.

Citation Download Citation

Thomas Reinsch and Jan Henninges "Temperature-dependent attenuation characteristics of fibers for distributed temperature sensing in hot geothermal wells", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75036E (5 October 2009); https://doi.org/10.1117/12.835384

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