可控震源噪声分析

Analysis of noise in vibroseis.

文中通过对中东A区三维地震勘探采集中较强噪声的分析,首先对记录系统的仪器、排列、可控震源、电源进行了测试,排除了记录系统产生噪声的可能性;其次运用相位旋转扫描方式,证明了可控震源谐振不是主要噪声;最终录制了可控震源发动机运转时产生的环境噪声,通过采用相关运算使得噪声变强,证实了可控震源振动时产生的噪声为声波干扰,利用内外切除方法有效滤除了此类噪声。

Through the analysis on stronger noise of 3D seismic exploration acquisition in A region of the Middle East, the paper first debugged the apparatus, spread, vibroseis and power in recording system; then, used phase-rotation sweeping to prove that the harmonic of vibroseis is not the dominant noise; and finally recorded the environmental noise produced by motor operation in vibroseis and proved that the noise produced by vibration of vibroseis is acoustic interference through correlation noise strengthening. Using inner and outer mute can effectively remove such kind of noise.