利用子波置换法提高地面地震资料的分辨率
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摘要
利用VSP资料所包含的高频信息,可以提高三维地面地震资料的分辨率。本文提出一种新的子波置换法——将地面地震记录中的子波,置换为零偏VSP的子波,在资料处理中通过子波置换反褶积实现。理论子波与倾斜地层模型实验证明了子波置换反褶积方法的效能。实际地震资料的处理效果表明,该方法可以有效地提高地震反射波的主频和高截频,同时较好地保护信号的低频成分,从而拓宽地面地震信号的频带宽度,提高地面地震资料的分辨率。
The high frequency information in VSP data can be used to enhance the resolution of 3D surface seismic data.A new method-wavelet replacement is presented in this study. The wavelet of surface seismic data is permuted by wavelet from VSP of zero offset.It is realized by wavelet replacement deconvolution in data processing.The efficiency of this method is proved by theoretical wavelet computation and slanting layers modeling.The correlation of wavelet can be derived from seismic records in real data processing.Result of processing of real seismic section shows the advantage of method that while the main frequency and high-cut frequency of reflection increases effectively and the low frequency ingredient is protected properly.The width of frequency band of surface seismic data is extended and resolution is enhanced.
The high frequency information in VSP data can be used to enhance the resolution of 3D surface seismic data.A new method-wavelet replacement is presented in this study. The wavelet of surface seismic data is permuted by wavelet from VSP of zero offset.It is realized by wavelet replacement deconvolution in data processing.The efficiency of this method is proved by theoretical wavelet computation and slanting layers modeling.The correlation of wavelet can be derived from seismic records in real data processing.Result of processing of real seismic section shows the advantage of method that while the main frequency and high-cut frequency of reflection increases effectively and the low frequency ingredient is protected properly.The width of frequency band of surface seismic data is extended and resolution is enhanced.
引文
[1]Satinder Chopra,2003,High Frequency Restoration of Surface Seismic Data 73th Ann Mtg SEG.
[2]姚忠瑞等.利用VSP提高叠后地面地震资料分辨率.油气地球物理,2006,4(4):23-27
[3]李文杰等.利用VSP提高地震资料处理质量的新途径.新疆石油地质,2006,26(1):96-98
[4]O.伊尔玛兹[美].地震资料分析(上).北京:石油工业出版社, 2006:133-149
[5]长春地质学院等.地震勘探原理与方法.北京:地质出版社, 1980:245-251
[6]李庆忠.走向精确勘探的道路.北京:石油工业出版社,1993:80-84
[2]姚忠瑞等.利用VSP提高叠后地面地震资料分辨率.油气地球物理,2006,4(4):23-27
[3]李文杰等.利用VSP提高地震资料处理质量的新途径.新疆石油地质,2006,26(1):96-98
[4]O.伊尔玛兹[美].地震资料分析(上).北京:石油工业出版社, 2006:133-149
[5]长春地质学院等.地震勘探原理与方法.北京:地质出版社, 1980:245-251
[6]李庆忠.走向精确勘探的道路.北京:石油工业出版社,1993:80-84
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