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本文以河南省YC煤田地震普查模拟磁带资料重新处理为例,说明了针对煤田地震工作特点,采用以反褶积和大倾角波动方程偏移为主的提高分辨率的处理方法的效果。使用常规叠加法得到的磁带地震反射资料,经过这种处理,可以使地震时间剖面的主频由30Hz提高到60～70Hz,从而得到2～4,7m厚的薄煤层强反射波,能比较可靠地确定落差30m的小断层,并发现一些落差20m左右的小断层,这就明显地提高了模拟磁带地震资料探测薄煤层和小断层的精度。表明由模拟磁带地震仪所得到的资料,在解决中浅层问题(如煤田勘查)时,大有潜力可挖。
This paper takes the re-processing of analogue tape data of YC coalfield survey in Henan Province as an example, and illustrates the effect of improving resolution by focusing on deconvolution and large dip angle wave equation for coalfield seismic work. Using this method, the dominant frequency of the seismic time profile can be increased from 30Hz to 60 ~ 70Hz by using the conventional seismic reflection data of the magnetic tape obtained by the conventional superposition method, and strong reflections of 2 ~ 4,7m thick thin coal seam can be obtained, which can be more reliable A small fault of 30 m in height was identified and some small faults with a drop of about 20 m were found. This markedly enhanced the accuracy of the seismic data of the simulated tapes in detecting thin and small faults. This shows that the data obtained from simulated tape seismographs have great potential to solve medium and shallow problems such as coalfield exploration.