12 October 2007 Field test investigation of fiber optic seismic geophone in oilfield exploration
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Proceedings Volume 6770, Fiber Optic Sensors and Applications V; 677005 (2007) https://doi.org/10.1117/12.734274
Event: Optics East, 2007, Boston, MA, United States
Abstract
The fiber optic sensors have grown to a promising technology in the application of oil and gas prospecting. Our group has embarked on the experimental design of fiber optic seismic geophone based on fiber-Bragg-grating (FBG) technology recently. This paper provides the detailed investigation and analysis of the sensor field test result in the seismic reflection survey of the oilfield exploration as a continuing effort to our previous research. Several revisions of previous sensor head design have been implemented which include the carbon fiber composite material based cantilever, auxiliary beam mechanical design, and the moving coil electro-magnetic damping design for an improved seismic signal sensitivity in the field test. The field tests of the redesigned sensing system show that: (1) the FBG seismic geophone has a higher sensitivity than the commercial geophone between 10-70 Hz and equal sensitivity to commercial geophone between 80-140 Hz (2) compared to the conventional geophone, the FBG seismic geophone is significantly immune from the electro-magnetic interference (3) the FBG geophone has a less nonlinear distortion than the conventional geophone and it is totally compatible with various commercial seismic recorders.
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Yan Zhang, Jing Ning, Shangming Yang, Hong-Liang Cui, "Field test investigation of fiber optic seismic geophone in oilfield exploration", Proc. SPIE 6770, Fiber Optic Sensors and Applications V, 677005 (12 October 2007); doi: 10.1117/12.734274; https://doi.org/10.1117/12.734274
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