Optical fiber based distributed temperature systems deployment for measurement of boreholes temperature profiles in the rock massif

This article is dealing with fiber optics application into the geological monitoring. The distributed temperature systems (DTS) are optoelectronic devices, which can continuously measure the temperature and strain along optical cables. These systems use the advantageous properties of optical fibers, which can equally act as sensors. Currently, the DTS systems begin to be applied across the entire spectrum of the industry as well as in the renewable energy field. Therefore, this article focuses on the application of the temperature measurements in the subsurface boreholes in the rock massif with regard to the heat pump sealing T-piece design (designed element allowing insertion of the optical cables into the polythene pipes). The rock massif behavior during long term charging and drawing regimes with the help of thermal response test was observed.