复杂山地弯宽线观测系统适用效果分析

以桂中地区复杂山地弯宽线地震资料采集为例进行不同观测系统叠加试验,分析不同覆盖次数的观测系统对资料的成像效果、信噪比、能量和频率的影响。宽线放炮或者交叉放炮可以改善接收方向上各项异性的接收效果,可以更好压制散射、侧面波、规则干扰等干扰波。因此高覆盖次数叠加可以很好的压制噪音。随着覆盖次数的增加剖面能量增强,信噪比增加,但覆盖次数高,剖面频率降低。

On the Application Effects of Crooked Wide Line Observing System in Complex Mountainous Areas

Based on the crooked wide line seismic data collected in the complex mountainous area in mid Guangxi Province, multiple tests are carried out with different combination of observing systems to analyze the impact that the different degrees of covering in observing systems cast on the imaging, signal to noise ratio, energy and frequency of data. The results demonstrate that wide line blasting or cross firing can improve the reception of anisotropy on receiver direction and better suppress disturbing waves such as scattering waves, lateral waves and regular noises. In a nutshell, overlapping of high degree of covering can tune down the noise better. As covering increases, profiles will gain energy and signal to noise ratio will rise but the frequency of profiles will decrease.