摘要
在干扰强烈而不易得到有效反射的地震地质条件复杂地区,可以采用超多道地震法进行油气勘探攻关。它是利用其道数特多的优势,最大限度地扩展采集范围,加密空间域时间域的采集密度,选择最有利的采集区间,以适应浅、中、深层和不同类型波的空间变化;同时提高叠加次数,进行有效的数据处理。这样能大大加强反射波,压制相干噪音,提高信噪比和分辨力,突出反射波组,以取得令人满意的解释剖面。本文介绍了超多道地震技术及其在南方碳酸盐岩地区的试验、应用,展示这一方法解决复杂构造问题的良好效果和潜在能力。
Abstract
In areas with strong noise and complex seismic-geologic condition as well as no available reflection, the super multichannel technique could be adopted to surmount the difficulties in oil/gas exploration. In the technique recommended, it is just because its superiority of "super multichannel", so the sphere of acguisition could be extended to the full extent, the density of acquisition both in space and time domain could be densi-fied, the most favourable intervals for acquisition could be picked out. Consequently, formations in different depths (shallow, medium, and deep) and variations of different waves in space could thus be recorded simultaneously. By increasing the number of coverage and improving the data processing, the reflection could thus be enhanced, the coherent noise could thus be suppressed, the S/N ratio and the resolution could thus be improved, and the reflection events could also be projected. As a matter of course, the interpretated sections were thuswise obtained with satisfaction.The experiment of the super multichannel technique and its application in carbonate areas in south China were introduced in this paper. In dealing with the complex structure, good results were obtained from this technique and its potentiality could be seen from what's presented in this paper explicitly.
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