High resolution 3C fiber laser micro-seismic geophone array for cross-well seismic

Fa-xiang Zhang; Shao-dong Jiang; Xiao-lei Zhang; Zhi-hui Sun; Xiao-hui Liu; Chang Wang; Jia-sheng Ni

doi:10.1117/12.2285719

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25 October 2017 High resolution 3C fiber laser micro-seismic geophone array for cross-well seismic

Fa-xiang Zhang, Shao-dong Jiang, Xiao-lei Zhang, Zhi-hui Sun, Xiao-hui Liu, Chang Wang, Jia-sheng Ni

Proceedings Volume 10464, AOPC 2017: Fiber Optic Sensing and Optical Communications; 1046426 (2017) https://doi.org/10.1117/12.2285719
Event: Applied Optics and Photonics China (AOPC2017), 2017, Beijing, China

Abstract

A two level 3-component distributed feed-back (DFB) fiber laser micro-seismic geophone array based on wavelength/space division multiplexing is developed. High resolution dynamic wavelength demodulation was realized with a coherent detection technology. The geophone array was tested in laboratory and showed that the detection capability of the weak vibration signals between 5-500 Hz was better than conventional moving-coil geophone. A cross-well test of the array was performed in a 100 m depth well in Changqing Oil Field in northwest China. The two level 3-component fiber laser micro-seismic geophone array was compared with the traditional in-well seismic geophone and showed better signal noise ratio (SNR) in the cross-well seismic signal acquisition. This 3C fiber laser micro-seismic geophone array system is promising in the cross-well seismic monitoring.

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Fa-xiang Zhang, Shao-dong Jiang, Xiao-lei Zhang, Zhi-hui Sun, Xiao-hui Liu, Chang Wang, and Jia-sheng Ni "High resolution 3C fiber laser micro-seismic geophone array for cross-well seismic", Proc. SPIE 10464, AOPC 2017: Fiber Optic Sensing and Optical Communications, 1046426 (25 October 2017); https://doi.org/10.1117/12.2285719

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