This paper presents several high-temperature resistance polyimide coated microstructured optical fibers, with enhanced scatterings benefited from the specially designed fiber structures. Beyond that, these fibers also possess high resistance to humidity and a long lifetime in hydrogen-rich environments. Using one of these fibers, we study the scattering enhancement in a distributed sensor system. When the fiber loss is 3 dB/km, the measurement accuracy can be effectively improved by 2~5 times. Further testing this system for fracturing monitoring in oil wells, the collected data from the sensing system prove that the underneath fracturing can be monitored and be further used for supervising fracturing and temporary plugging operations.
LIU Shuai, WANG Zhi, WANG Aiqing, LI Shijian, TU Dongsheng, ZHENG Yu, NUERMAIMAITI·Wumaierjiang
. Fracturing Monitoring of Oil-Wells Using Microstructured Optical Fiber Based Distributed Sensing[J]. Journal of Applied Sciences, 2022
, 40(2)
: 190
-203
.
DOI: 10.3969/j.issn.0255-8297.2022.02.002
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