光纤水听器阵列应用于海洋地震勘探的试验*

doi:10.11978/2017076

Journal of Tropical Oceanography ›› 2018, Vol. 37 ›› Issue (3): 93-98.doi: 10.11978/2017076CSTR: 32234.14.2017076

• Orginal Article • Previous Articles

Sea trial for fiber-optic hydrophone array used in marine geophysical exploration

Xiaozhu HAO^1,²(), Hanquan ZHANG^1,², Chenglong WEI^1,², Cong WANG^1,², Haibing ZHANG³

1. Guangzhou Marine Geological Survey, Guangzhou 510760, China
2. Key Laboratory of Marine Mineral Resources, Ministry of Land Resources, Guangzhou 510075, China
3. Appsoft Technology Co., Ltd, Beijing 100085, China.

Received:2017-07-06 Revised:2017-09-04 Online:2018-06-10 Published:2018-05-03
Supported by:
The Development of Major National Scientific Instruments and Equipment (2013YQ14043106)

Abstract

Abstract:

In order to test the performance of fiber optic hydrophone array in marine seismic exploration, we carried out a test in the South China Sea. We used the same mode of operation in the same location for marine seismic exploration, using the 1024 channels fiber-optical hydrophone array and the 360 channels piezoelectric hydrophone imported marine seismic exploration devices. Then, we compared the marine seismic exploration data collected by the two setups. The test results show that the frequency range of the data collected by the fiber optic hydrophone array reached 10-120 Hz, which is wider than 10-80 Hz of the piezoelectric hydrophone marine seismic exploration devices. The resolution ratio of seismic section is better than that of piezoelectric hydrophone marine seismic exploration devices. After some adaptive improvements, the fiber optic hydrophone array can satisfy the performance requirements of marine seismic exploration.

Key words: fiber-optic hydrophone, piezoelectric hydrophone, marine seismic exploration

Xiaozhu HAO, Hanquan ZHANG, Chenglong WEI, Cong WANG, Haibing ZHANG. Sea trial for fiber-optic hydrophone array used in marine geophysical exploration[J].Journal of Tropical Oceanography, 2018, 37(3): 93-98.

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指标	参数
阵元间距	按需定制, 典型值0.75m、1m、1.5m、3.125m、6.25m、12.5m
阵列直径	30~36mm
灵敏度	-140~-145dB
工作频率	10Hz~12kHz
灵敏度一致性	±1dB(全频段)
相位一致性	小于2°

参数	光纤系统	SEAL 428系统
电缆长度/m	1800	2250
记录道数	1024	360
电缆深度/m	10~15	5
道间距/m	0.3~2.4	6.25
采样间隔/ms	0.25	0.5
低截滤波/Hz	6	6
最小炮检距/m	100	125
采样长度/s	连续记录	7

Sea trial for fiber-optic hydrophone array used in marine geophysical exploration

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