数字检波器与模拟检波器采集效果对比

Acquisition data comparison between digital geophone and analog geophone

传统模拟检波器具有频带窄、动态范围小、灵敏度低、一致性差等缺陷,严重制约了高分辨率地震勘探的发展。理论对比发现,SVSM、陆用压电等数字检波器在提高分辨率方面有独特的效果。本文在大量野外试验的基础上,根据实际取得的地震资料效果,对几种数字和传统模拟检波器的采集效果进行了深入地对比分析。现场试验资料分析结果表明,在信噪比较高的地区使用数字检波器可提高分辨率,这与理论分析结论符合性很高。应用该认识开展二维资料采集,得到了预期的剖面叠加效果,为高分辨率地震勘探技术的发展积累了一些重要经验。

With the drawbacks of narrow frequency band, small dynamic range, low sensitivity, and bad consistency, the traditional analog geophone could not keep up with the developing of high resolution seismic exploration. Digital ge- ophone, SVSM and land piezoelectric detector proved to be of unique effects in improving resolution though experi- mental materials and theory analysis. Field data analysis results show that, in high SNR region using the digital geo- phone can improve resolution. Application of digital geophone for the two-dimensional data collection, can obtain the expected profile for stack effect.