提高海上单道反射地震记录信噪比和分辨率的方法技术

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英文篇名：THE TECHNIQUE OF IMPROVING SIGNAL-TO-NOISE RATIO AND RESOLUTION FOR MARINE SEISMIC PROFILING 中文刊名：物探化探计算技术 英文刊名：Computing Techniques for Geophysical and Geochemical Exploration 作者：刘建勋 英文作者：LIU Jian-xun(Institute of Geophysical and Geochemical Exploration ; CAGS ; Langfang Hebei 065000 ; China). 中文关键词：单道反射地震 ; 信噪比 ; 分辨率 英文关键词：seismic reflection profiling ; signal-to-noise ratio ; high-resolution 出版日期：2007-10-15 机构：中国地质科学院地球物理地球化学勘查研究所 河北廊坊065000 年：2007 期：S1 出版单位：物探化探计算技术

摘要

海上浅层单道反射地震的数据不需要水平叠加处理,该方法在更容易获得较好的保真度、较高分辨率剖面的同时,要求有高信噪比的地震记录为基础。通过对野外数据采集过程中噪声干扰情况的分析,合理地选择激发震源、检波器因素及仪器参数,不仅能够得到频带较宽、主频较高的高分辨率地震时间剖面,而且能够压制部分随机噪声;在资料处理流程中,采用有效的方法技术对数据进行信噪分离,削弱多次及绕射等干扰波的影响,可进一步提高单道地震记录的信噪比和分辨率。
The records of marine seismic profiling, with non-stacking needed and easy to get having high fidelity and resolution, must be of high signal-to-noise ratio. Based on the analyses of interferences encountered during field data acquisition, by reasonably selecting factors of source and geophone and recording parameters, not only seismic records of wider frequency band and higher dominant frequency could be obtained, but also some random interference could be impressed. The signal-to-noise ratio of marine seismic profiling could be further improved by adopting effective separation technique of signal/noise in data processing, as well as suppressing multiple-reflections and refractions.

引文

[1]唐建人,李勤学.高分辨率地震勘探理论与实践[M].北京:石油工业出版社,2001.
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    [3]R.E.谢里夫,L.P.吉尔达特.勘探地震学[M].北京:石油工业出版社,1999.