P8.8 - Application of Distributed Optical Fiber Sensors to Borehole Temperature and Strain Monitoring

N. Nöther, M. Krcmar, St. Von Der Mark & J. Henninges
We report on the successful application of distributed optical fiber sensors for temperature and strain measurement into a borehole. Fiber sensors have been installed at the outside of the well casings to a depth of 800 m. Continuous, truly distributed strain and temperature measurements were performed during a 5-day cycle of operational temperature changes within the well. For distributed strain measurement, a novel approach to Brillouin sensing was employed, comprising an all-digital sensing configuration in...