GeoMountain解释工程师系统中相干体软件的开发及应用
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摘要
相干体技术是利用相邻道地震信号的相似性来检测地震同相轴的不连续性,可以用来识别断层、特殊岩性体、河道等地质现象。在概述了第一代相干体两道互相关算法(C1)、第二代相干体多道相似系数算法(C2)、第三代相干体特征值算法(C3)及其特点的基础上,改进了基于本征值结构的C3相干体算法。结果表明,改进算法具有更好的信噪比和分辨率,计算速度进一步提高。在独立自主研制的GeoMountain解释工程师软件系统平台上开发出相干体分析软件,给出了相干体算法应用实例。
The coherence computation is to make use of the similarities of neighboring seismic signals to detect the discontinuity of seismic events,thus to help identify geological phenomena like faults,particular lithostrome,and river channel,etc.This paper first gives a general overview on the first generation of two-trace crosscorrelation coherence algorithm(C1),the second generation of multi-trace semblance coherence algorithm(C2),and the third generation of eigenstructure-based coherence algorithm(C3).Through improving the eigenstructure-based coherence algorithm(C3),having proved to have a high SNR and high resolution with a high computation speed,this paper introduces how to work out coherence computation software developed from the self-developed GeoMountain Interpreter System,and demonstrates by many examples.
The coherence computation is to make use of the similarities of neighboring seismic signals to detect the discontinuity of seismic events,thus to help identify geological phenomena like faults,particular lithostrome,and river channel,etc.This paper first gives a general overview on the first generation of two-trace crosscorrelation coherence algorithm(C1),the second generation of multi-trace semblance coherence algorithm(C2),and the third generation of eigenstructure-based coherence algorithm(C3).Through improving the eigenstructure-based coherence algorithm(C3),having proved to have a high SNR and high resolution with a high computation speed,this paper introduces how to work out coherence computation software developed from the self-developed GeoMountain Interpreter System,and demonstrates by many examples.
引文
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[3]BAHORICH M S,LOPEZ J A,HASKELL N L,et al.Stratigraphic and structural interpretation with3-D seis-mic coherence[J].AAPG Bulletin,1996:80.
[4]MARFURT KJ,KIRLIN R L,FARMER S L,et al.3-D seismic attributes using a semblance-based coherency al-gorithm[J].Geophysics,1998,63(4):1150-1165.
[5]GERSZTENKORN A,MARFURT K J.Eigenstructure-based coherence computations as an aid to3-D structural and stratigraphic mapping[J].Geophysics,1999,64(5):1468-1479.
[6]CHOPRAS.Coherence cube and beyond[J].First Break,2002,20(1):27-33.
[7]侯伯刚,乌达巴拉,杨再岩.地震相干体技术简介及其应用[J].现代地质,1999,13(1):121-124.
[2]BAHORICH M S,FARMER S L.3-D seismic disconti-nuity for faults and stratigraphic features;The coherence cube[J].The Leading Edge,1995,14(10):1053-1058.
[3]BAHORICH M S,LOPEZ J A,HASKELL N L,et al.Stratigraphic and structural interpretation with3-D seis-mic coherence[J].AAPG Bulletin,1996:80.
[4]MARFURT KJ,KIRLIN R L,FARMER S L,et al.3-D seismic attributes using a semblance-based coherency al-gorithm[J].Geophysics,1998,63(4):1150-1165.
[5]GERSZTENKORN A,MARFURT K J.Eigenstructure-based coherence computations as an aid to3-D structural and stratigraphic mapping[J].Geophysics,1999,64(5):1468-1479.
[6]CHOPRAS.Coherence cube and beyond[J].First Break,2002,20(1):27-33.
[7]侯伯刚,乌达巴拉,杨再岩.地震相干体技术简介及其应用[J].现代地质,1999,13(1):121-124.
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