盒子波技术在下扬子地区油气勘探中的应用研究
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摘要
针对江苏下扬子地区中古生界勘探中地震资料信噪比非常低的特点,为此开展中古生界地震勘探盒子波攻关试验。首先对该区干扰波特征进行分析,然后利用盒子波技术分别从切比索夫加权组合、时频谱分析等方面进行信噪比的定量分析和噪声识别,以得到优化的野外组合方法,来压制干扰并确定出合适的野外采集方案。通过新、老资料采集、处理对比分析,盒子波技术综合应用研究取得良好效果,是压制各种干扰的有效手段。
In consideration of the low signal to noise ratio of seismic data in the exploration of Mesozoic & Paleozoic region, Lower Yangzi area, brainstorm tests are launched for seismic exploration of Mesozoic & Paleozoic region on the basis of box-wave technique.In the process, the features of interference wave in this area are analyzed first. Then the box-wave technique is applied in the quantitativeanalysis and noise identification of signal to noise ratio from the perspectives of Chebyshev weighted array and time-frequency spectrumanalysis with an aim to optimize geophone arrays to suppress noise and get suitable scheme for field acquisition. Based on comparativeanalysis on the old and new data, box-wave technique is proved to be effective to suppress backscattered seismic noise.
In consideration of the low signal to noise ratio of seismic data in the exploration of Mesozoic & Paleozoic region, Lower Yangzi area, brainstorm tests are launched for seismic exploration of Mesozoic & Paleozoic region on the basis of box-wave technique.In the process, the features of interference wave in this area are analyzed first. Then the box-wave technique is applied in the quantitativeanalysis and noise identification of signal to noise ratio from the perspectives of Chebyshev weighted array and time-frequency spectrumanalysis with an aim to optimize geophone arrays to suppress noise and get suitable scheme for field acquisition. Based on comparativeanalysis on the old and new data, box-wave technique is proved to be effective to suppress backscattered seismic noise.
引文
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[3]凌云,张汝杰,等.方阵排列干扰波调查方法研究[J].石油地球物理勘探,2001,35(2)
[4]朱梅湘.中下扬子区三叠纪海相碳酸盐岩成岩作用和成岩环境[J].古地理学报,2000,2(4):43～49
[5]王正军.盒子波技术在干扰波调查中的应用研究[J].江汉石油学院学报,2002,24(2):36～37
[2]Regone C J.Identifying,quantifying,and suppressingbackscattered seismic noise:60th Ann.Internet.Mtg.Soc.Expl.Geophys.,Expanded Abstracts,1990:748～751
[3]凌云,张汝杰,等.方阵排列干扰波调查方法研究[J].石油地球物理勘探,2001,35(2)
[4]朱梅湘.中下扬子区三叠纪海相碳酸盐岩成岩作用和成岩环境[J].古地理学报,2000,2(4):43～49
[5]王正军.盒子波技术在干扰波调查中的应用研究[J].江汉石油学院学报,2002,24(2):36～37
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