时频域谱模拟反褶积方法研究
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摘要
由于地层的吸收衰减作用,地震波在传播过程中不断衰减,振幅谱有效频带变窄,降低了地震剖面的分辨率。经窗函数能量归一化后的广义S变换能在保持时间分辨率不降低的前提下,提高频率域的分辨率。将改进广义S变换与谱模拟反褶积方法相结合,克服了傅里叶变换中复杂的时窗大小问题,能更好地适应地震信号是平稳信号的假设条件。通过模型试算和实际地震资料处理,有效地提高了地震资料的分辨率,以及薄储层的识别和精细储层的描述能力,验证了该方法的可行性。
The energy of seismic wave attenuates continuously in spreading process,and its effective band of frequency amplitude spectrum is striation,which declines the resolution of seismic data.Improved generalized S transform of window function normalized energy holds time resolution constant,and improves the frequency resolution at the same time.Spectral modeling method is drawn in time-frequency domain,in order to avoid the complex window dimension program of the Fourier transform.Spectral modeling method is adapted to the assumption condition that seismic data are smooth and steady signals.Through model experiment and actual seismic data processing,it is proved that this method can improve the resolution of seismic data effectively,which is favorable for thin reservoir identification and fine reservoir description.
The energy of seismic wave attenuates continuously in spreading process,and its effective band of frequency amplitude spectrum is striation,which declines the resolution of seismic data.Improved generalized S transform of window function normalized energy holds time resolution constant,and improves the frequency resolution at the same time.Spectral modeling method is drawn in time-frequency domain,in order to avoid the complex window dimension program of the Fourier transform.Spectral modeling method is adapted to the assumption condition that seismic data are smooth and steady signals.Through model experiment and actual seismic data processing,it is proved that this method can improve the resolution of seismic data effectively,which is favorable for thin reservoir identification and fine reservoir description.
引文
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[7]唐博文,赵波,吴艳辉,等.一种实现谱模拟反褶积的新途径[J].石油地球物理勘探,2010,45(增刊1):66-70.
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[11]边立恩,贺振华,黄德济.包含流体介质的地震波场特征及频率分布[J].岩性油气藏,2008,20(3):74-78.
[12]韩瑞冬,万忠宏,张红英.基于S变换的时频分析技术在碳酸盐岩储层预测中的应用[R].2010年国际石油地球物理技术交流会,兰州,2010.
[13]刁瑞,李振春,韩文功,等.基于广义S变换的吸收衰减分析技术在油气识别中的应用[J].石油物探,2011,50(3):260-265.
[14]李振春,刁瑞,韩文功,等.线性时频分析方法综述[J].勘探地球物理进展,2010,33(4):239-246.
[2]刘浩杰,王延光.地震资料分辨率若干问题的探讨[J].油气地球物理,2009,7(4):5-10.
[3]Rose A L R,Ulrych T J.Processing via spectral modeling[J].Geo-physics,1991,56(8):1244-1251.
[4]Walden A T,Nunn K R.Correcting for coloured primary reflectivity in deconvolution[J].Geophysical Prospecting,1988,36(3):282-297.
[5]赵波,俞寿朋,聂勋碧,等.谱模拟反褶积方法及其应用[J].石油地球物理勘探,1996,31(1):101-116.
[6]孙成禹.谱模拟方法及其在提高地震资料分辨率中的应用[J].石油地球物理勘探,2000,35(1):27-35.
[7]唐博文,赵波,吴艳辉,等.一种实现谱模拟反褶积的新途径[J].石油地球物理勘探,2010,45(增刊1):66-70.
[8]王德营,李振春.自适应谱模拟反褶积方法研究[C]∥中国地球物理学会.中国地球物理学会第二十七届年会论文集.长沙:中国科学技术大学出版社,2011.
[9]吕珊珊,熊晓军,贺振华.基于波动方程的AVO模型数值模拟方法研究[J].岩性油气藏,2011,23(6):102-105.
[10]王小杰,印兴耀,吴国忱.粘弹性介质地震波传播特征及反射特征研究[J].物探化探计算技术,2012,34(3):258-266.
[11]边立恩,贺振华,黄德济.包含流体介质的地震波场特征及频率分布[J].岩性油气藏,2008,20(3):74-78.
[12]韩瑞冬,万忠宏,张红英.基于S变换的时频分析技术在碳酸盐岩储层预测中的应用[R].2010年国际石油地球物理技术交流会,兰州,2010.
[13]刁瑞,李振春,韩文功,等.基于广义S变换的吸收衰减分析技术在油气识别中的应用[J].石油物探,2011,50(3):260-265.
[14]李振春,刁瑞,韩文功,等.线性时频分析方法综述[J].勘探地球物理进展,2010,33(4):239-246.
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