A high sensitivity fiber Bragg grating seismic system and oil exploration test

Zhihui Sun; Ming Li; Shaodong Jiang; Meng Wang; Lin Zhang; Xiaolei Zhang; Chang Wang; Zhong Zhao; Guanghu Hao; Gangding Peng

doi:10.1117/12.2295465

10 January 2018 A high sensitivity fiber Bragg grating seismic system and oil exploration test

Zhihui Sun, Ming Li, Shaodong Jiang, Meng Wang, Lin Zhang, Xiaolei Zhang, Chang Wang, Zhong Zhao, Guanghu Hao, Gangding Peng

Author Affiliations +

Proceedings Volume 10618, 2017 International Conference on Optical Instruments and Technology: Advanced Optical Sensors and Applications; 1061809 (2018) https://doi.org/10.1117/12.2295465
Event: International Conference on Optical Instruments and Technology 2017, 2017, Beijing, China

Abstract

In this paper we report the development and field test of a high sensitivity fiber Bragg grating (FBG) geophone for geophysical imaging and monitoring application. A high sensitivity FBG geophone is designed, and its sensitivity is about 1000pm/g. The wavelength change of the FBG geophone is interrogated by using interferometric demodulation method, and the demodulation system noise is below 10^-3 pm/ √Hz . And the minimum detectable seismic signal is below 1μg/ √Hz . We are presenting field test results for the FBG geophone and comparing its performance with regular exploration geophones. In comparison, FBG geophone has the advantages of higher signal-to-noise ratio and better low-frequency response. This work shows that using FBG technology to develop geophone for oil and gas exploration is both advantageous and feasible.

Citation Download Citation

Zhihui Sun, Ming Li, Shaodong Jiang, Meng Wang, Lin Zhang, Xiaolei Zhang, Chang Wang, Zhong Zhao, Guanghu Hao, and Gangding Peng "A high sensitivity fiber Bragg grating seismic system and oil exploration test", Proc. SPIE 10618, 2017 International Conference on Optical Instruments and Technology: Advanced Optical Sensors and Applications, 1061809 (10 January 2018); https://doi.org/10.1117/12.2295465

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KEYWORDS

Fiber Bragg gratings

Signal detection

Demodulation

Signal to noise ratio

Phase shifts

Fiber lasers

Fiber optics

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