连片波形一致性处理技术研究
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摘要
波形一致性问题是地震资料连片处理中首要考虑的关键因素。多区块连片处理中,因采集年代、激发因素、接收条件的不同,原始数据在子波振幅、频率、相位等方面存在明显的差异。常规处理多采用频率、振幅、反褶积等匹配方法来调整原始资料的频率和相位关系,但这种处理方式会影响叠前处理的效果。采用连片波形一致性处理技术,有效地消除上述因素造成的区块间波形差异,互相关系数达到0.9以上。该技术应用于徐家围子断陷23个区块三维大连片处理,取得了明显的效果。
Waveform consistency is an important factor in unified seismic data processing.In multi-block processing,the wavelet amplitude,frequency and phase are different because of the different data acquisition time,source and receiver properties. In conventional seismic data processing,the method of prestack frequency consistency,amplitude consistency and deconvolution are applied to adjust the relationship between wavelet frequency and phase of original seismic data.But the above consistency processing can reduce the seismic data prestack processing quality. The unified waveform consistency processing method can eliminate the waveform difference in different blocks,and the crosscorrealtion coefficient of wavelet is more than 0.9. In the application of the technique in 23 blocks of Xujiaweizi,we have got good results of waveform consistency processing.
Waveform consistency is an important factor in unified seismic data processing.In multi-block processing,the wavelet amplitude,frequency and phase are different because of the different data acquisition time,source and receiver properties. In conventional seismic data processing,the method of prestack frequency consistency,amplitude consistency and deconvolution are applied to adjust the relationship between wavelet frequency and phase of original seismic data.But the above consistency processing can reduce the seismic data prestack processing quality. The unified waveform consistency processing method can eliminate the waveform difference in different blocks,and the crosscorrealtion coefficient of wavelet is more than 0.9. In the application of the technique in 23 blocks of Xujiaweizi,we have got good results of waveform consistency processing.
引文
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[3]仲伯军,印兴耀.复杂地区三维地震资料拼接中的一致性处理技术[J].石油物探,2008,47(4):393-397
[4]云美厚,丁伟,王开燕,等.地震资料一致性处理方法研究与初步应用[J].石油物探,2006,45(1):65-69
[5]王元波.三维地震处理连片拼接技术[J].大庆石油地质与开发,2001,20(3):67-68
[6]王加海,秦文明,黄棱,等.三维连片处理技术在吉林探区的应用[J].天然气工业,2007,27(S1):130-133
[7]吴琼,杨长春,张文忠,等.过渡带拼接地震资料处理方法研究[J].地球物理学展,2008,23(3):761-767
[8]王西文,周立宏.三维地震资料拼接中的地震子波处理[J].石油物探,2002,41(4):448-451
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