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在准噶尔盆地内分布着多种类型的沙漠,它们占据了盆地中大部分的面积。沙漠区的中部、中南部的蜂窝状沙丘及南北向的大沙垄的地形条件最坏,使地震资料的质量受到影响。为了在此困难的地区内改进反射波法地震勘探的效果,在过去几年中进行了很多试验,取得了一定的效果.后来又在以往的测线上,采取了强化野外方法的措施,并用可控震源与炸药震源进行比较,取得了有意义的结果。进一步根据频率波数域振幅谱的分析,研究了干扰波的特征,并采取相应的二维滤波以消除干扰。同时,在频率域对叠加后的剖面进行频率扫描分析,对深层反射的低频特点的认识比以往深入一步,从而提示我们今后要在更低、更宽通频带的记录上研究它们。
There are many types of deserts in the Junggar Basin that occupy most of the basin. The worst topographic conditions in the central desert area, honeycomb sand dunes in central and southern China, and large sand dunes in the north and south directions have affected the quality of seismic data. In order to improve the seismic performance of the reflection wave method in this difficult area, many experiments have been carried out in the past few years, and some results have been obtained. Later, on the previous survey lines, measures for enhancing the field method were adopted and used Vibrator and explosives source comparison, and achieved significant results. According to the analysis of the amplitude spectrum of the frequency wave number domain, the characteristics of the interference wave are studied, and the corresponding two-dimensional filtering is adopted to eliminate the interference. In the meantime, frequency sweep analysis of superimposed sections in the frequency domain gives a deeper understanding of the low-frequency characteristics of deep reflection than in the past, suggesting that we should study them in the lower and wider passband records in the future.