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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。
Seismic exploration on the Loess Plateau is a worldwide technical problem because of the interference factors in the loess area, which makes the signal-to-noise ratio of seismic data too low. At present, the commonly used acquisition methods are not good for the strong secondary disturbances in the vertical line direction of the loess plateau. To sum up, the seismic data acquisition in loess areas in the southwest of the Tazhong Basin is carried out by the combination of wide line and large pattern, and the effect is analyzed. Practice shows that the application of wide line combination method is an effective measure to improve the signal-noise ratio of seismic data in the loess plateau region, and can be widely applied in seismic exploration in low signal-to-noise ratio area.