In this paper, we designed a high sensitivity geophone and tested its sensitivity, based on the theory of FBG sensing. The frequency response range is from 10 Hz to 100 Hz and the acceleration of the fiber optic seismic geophone is over 1000pm/g. sixteen-element fiber optic seismic geophone array system is presented and the field test is performed in Shengli oilfield of China. The field test shows that: (1) the fiber optic seismic geophone has a higher sensitivity than the traditional geophone between 1-100 Hz;(2) The low frequency reflection wave continuity of fiber Bragg grating geophone is better.
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Meng Wang, Li Min, Xiaolei Zhang, Faxiang Zhang, Zhihui Sun, Shujuan Li, Chang Wang, Zhong Zhao, Guanghu Hao, "Field test investigation of high sensitivity fiber optic seismic geophone," Proc. SPIE 10464, AOPC 2017: Fiber Optic Sensing and Optical Communications, 104641G (24 October 2017);