【摘要】 黄土塬上的地震勘探是一个世界性的技术难题,其原因在于黄土覆盖区干扰因素太多,使得地震资料的信噪比过低。目前常用的采集方法对于黄土塬区垂直测线方向的强烈的次生干扰无能为力,为此应用宽线大组合方法在塔西南盆地黄土覆盖区进行地震资料采集,并对效果进行了分析。实践表明:宽线大组合采集方法的应用,是黄土塬区抑制噪声提高地震资料信噪比的有效手段,可在低信噪比地区地震勘探中推广应用。更多还原

【Abstract】 The loess plateau seismic survey is a difficult problem in the world, because too many disturbance factors of the loess overlay area result in too low signal-to-noise ratio. Nowadays the field acquisition mainly uses the geophone pattern, which is an in-line array, but the pattern is not suitable for the strong secondary interference in cross line. Thus, the principle of the wide line array is first used to collect the seismic data in the loess overlay area in the southwest of Tarim basin, and the paper analyzes its effects. Research results show that the principle of the wide line array is an efficient way in removing noises and improving the SNR of the seismic data, and it can be applied in seismic acquisition at low singal-to-noise ratio areas.更多还原