可控震源自适应地表一致性反褶积
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摘要
随着地震勘探资料处理技术的发展，用于地震勘探数据处理的反褶积方法也不断完善。但是，多年来对可控震源地震数据处理主要采用纯相位滤波方法来进行零相位至小相位的子波转换。这种方法对于有Q吸收的实际地震数据存在一定问题，它使可控震源相关子波不再是零相位，而是混合相位，并且随着Q吸收的增大，其影响也随之增加。为此，本文提出了可控震源自适应地表一致性反播积方法。该方法能自动提取地表一致性Q吸收量，并模拟出地表一致性Q吸收可控震源相关子波，用子波反褶积来达到提高分辨率和相位转换的目的。理论试验和实例表明，该方法对进一步拓宽可控震源频带和进行高分辨率勘探，提供了一种有效的可控震源数据处理反褶积方法。
Deconvolution for seismic data processing becomes increasingly perfect with thedevelopment of seismic data processing methods- people usually use pure-phase filter ing to make conversion from zero-phase wavelet to small-phase wavelet in processingvibroseis data;however,some troubles arise in processing Q-absorptive data becausethe method makes correlative wavelets becorne mixed phase wavelets and becausesuch phenomenon gets serious with the increase of Q absorption. ln view of such aproblem 'we put forward surface-consistent adaptive deconv0lution for vibroseis dataprocessing. This technique can be used to automatically compute surface consistent Qabsorption and to model correlative wavelets with Q absorption. What is more,wavelet deconvolution can achieve high resolution and phase conversion- Theoreticalexperiment and practical processing show that this technique is an effective data de convolution suitable to wide frequency-band and high resolution vibroseis explo ratlons.
Deconvolution for seismic data processing becomes increasingly perfect with thedevelopment of seismic data processing methods- people usually use pure-phase filter ing to make conversion from zero-phase wavelet to small-phase wavelet in processingvibroseis data;however,some troubles arise in processing Q-absorptive data becausethe method makes correlative wavelets becorne mixed phase wavelets and becausesuch phenomenon gets serious with the increase of Q absorption. ln view of such aproblem 'we put forward surface-consistent adaptive deconv0lution for vibroseis dataprocessing. This technique can be used to automatically compute surface consistent Qabsorption and to model correlative wavelets with Q absorption. What is more,wavelet deconvolution can achieve high resolution and phase conversion- Theoreticalexperiment and practical processing show that this technique is an effective data de convolution suitable to wide frequency-band and high resolution vibroseis explo ratlons.
引文
1 Berkhout A J. Least-squares invers flitering and wavelet deconvolution, Geopysics, 1977, 42( 7): 1369～1383
2张永刚,傅才芳.两步法统计子波反格积.物探科技通报,1988,6(2):19～28
3 TanerM Tand KOehler F.Surface consistentcorrections.Geophysics,1981,46(1):17～22
4刘颂威译.连续振动系统反褶积.石油地球物理勘探,1977,12(1);36～48
5王卫华.伯格反褶积的实现.石油地球物理勘探,1984,15(3):272～275
6郑放莹.消除仪器因素影响的反把积.石油地球物理勘探,1982,17(3):54～59
7周兴元.应用同态理论估算地震子波.石油地球物理勘探,1983,18(6):510～521
8凌云,郭向宇.非地表一致性噪音压制方法.石油地球物理勘探,1992,27(1):13～28
9赵波等.对反褶积后反射系数有色成分的补偿.物探科技通报,1993,11(2):99～106
2张永刚,傅才芳.两步法统计子波反格积.物探科技通报,1988,6(2):19～28
3 TanerM Tand KOehler F.Surface consistentcorrections.Geophysics,1981,46(1):17～22
4刘颂威译.连续振动系统反褶积.石油地球物理勘探,1977,12(1);36～48
5王卫华.伯格反褶积的实现.石油地球物理勘探,1984,15(3):272～275
6郑放莹.消除仪器因素影响的反把积.石油地球物理勘探,1982,17(3):54～59
7周兴元.应用同态理论估算地震子波.石油地球物理勘探,1983,18(6):510～521
8凌云,郭向宇.非地表一致性噪音压制方法.石油地球物理勘探,1992,27(1):13～28
9赵波等.对反褶积后反射系数有色成分的补偿.物探科技通报,1993,11(2):99～106
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