关键词: 分布式光纤传感, 相位敏感光时域反射技术, 地震波探测, 干涉技术

Abstract:

In this paper, a new type of distributed fiber seismic wave detection system for oil and gas exploration was designed. And based on buried layout mode, the advanced practical layout optimization scheme of adding caudal vertebrae to optical cable was put forward. Field test results showed that the system could completely detect the distribution of seismic waves along the cable and the waveform characteristics were similar to those of traditional electronic dynamic sensors. The buried layout mode has the maximum detection distance of up to 20 m and the maximum distance of the caudal vertebral layout mode can reach 10 m. The research provides necessary theoretical and technical support for the extensive application and transformation of the new system.

Key words: distributed fiber sensing, interferometry, seismic wave detection, phase sensitive optical time domain reflectometry