浅地层剖面的自由界面多次波预测与衰减
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摘要
本文基于仅包含一次波和自由界面多次波的原始浅剖资料地震波场,推导出适应于单道数据的自由界面多次波预测方程,并提出基于同相轴追踪的多次波剔除与多道维纳滤波相结合的组合匹配衰减方法,实现了高精度的浅剖数据自由界面多次波预测与衰减,理论模型与实际浅地层剖面的处理实验均证明了该多次波预测与匹配衰减方法的有效性。
Based upon the assumption of the source seismic wavefield consists of not only the primaries but also all the orders of surface multiples within sub-bottom profile data,the thesis derives prediction equation of surface-related multiple which is applicable to single trace data,and introduces a combined matching attenuation method which consists of event tracing multiple subtraction and multi-channel Wiener filtering.Therefore,the high accuracy multiple prediction and elimination method has been implemented for sub-bottom profile processing.Synthetic and field data tests prove that the method has better effectiveness.
Based upon the assumption of the source seismic wavefield consists of not only the primaries but also all the orders of surface multiples within sub-bottom profile data,the thesis derives prediction equation of surface-related multiple which is applicable to single trace data,and introduces a combined matching attenuation method which consists of event tracing multiple subtraction and multi-channel Wiener filtering.Therefore,the high accuracy multiple prediction and elimination method has been implemented for sub-bottom profile processing.Synthetic and field data tests prove that the method has better effectiveness.
引文
[1]王方旗.浅地层剖面仪的应用及资料解译研究[D].青岛:国家海洋局第一海洋研究所,2010.Wang Fang-Qi.The Research of the Application and Data Interpretation of Sub-bottom Profiler[D].Qingdao:The First Institute of Oceanography,SOA,2010.
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[10]马继涛,Sen K M,陈小宏,姚逢昌.海底电缆多次波压制方法研究[J].地球物理学报,2011(11):2960-2966.Ma J T,Sen K M,Chen X H.OBC multiple attenuation technique using SRME theory[J].Chinese Journal of Geophysics,2011(11):2960-2966.
[11]郝振江,冯飞,王得利,等.Curvelet域海底电缆多次波压制方法研究[J].世界地质,2013,32(1):130-136.Hao Zhen-Jiang,Feng Fei,Wang De-Li,et al.Research on OBC multiple wave attenuation method in Curvelet domain[J].Global Geology,2013,32(1):130-136.
[12]谭军,李金山,宋鹏,等.基于同相轴优化追踪的多次波匹配衰减方法[J].中国石油大学学报(自然科学版),2016,40(6):40-49.TAN Jun,LI Jinshan,SONG Peng,et al.Multiple matching attenuation method based on optimized event tracing[J].Journal of China University of Petroleum(Edition of Natural Science),2016,40(6):40-49.
[13]Treitel S.Principles of digital multichannel filtering[J].Geophysics,1970,35(5):785-811.
[14]Wang Y.Multiple subtraction using an expanded multichannel matching filter[J].Geophysics,2003,68(1):346-354.
[2]刘保华,丁继盛,裴颜良.海洋地球物理探测技术及其在近海工程中的应用[J].海洋科学进展,2005,23(3):374-384.Liu Bao-Hua,Ding Ji-Sheng,Pei Yan-Liang.Marine geophysical survey techniques and their applications to offshore engineering[J].Advances In Marine Science,2005,23(3):374-384.
[3]Ryu J V.Decomposition(DECOM)approach applied to wave field analysis with seismic reflection records[J].Geophysics,1982,47(6):869-883.
[4]Hampson D.Inverse velocity stacking for multiple elimination[J].Journal of the Canadian Society of Exploration Geophysicists,1986,22(1):44-55.
[5]Sacchi M D,Ulrych T J.High resolution velocity gathers and offset space reconstruction[J].Geophysics,1995,60(4):1169-1177.
[6]Verschuur D J,Berkhout A J,Wapenaar C P A.Adaptive surfacerelated multiple elimination[J].Geophysics,1992,57(9):1166-1177.
[7]Verschuur D J,Berkhout A J.Estimation of multiple scattering by iterative inversion,Part II:Practical aspects and examples[J].Geophysics,1997,62(5):1596-1611.
[8]Berkhout A J,Verschuur D J.Estimation of multiple scattering by iterative inversion,Part I:Theoretical considerations[J].Geophysics,1997,62(5):1586-1595.
[9]史文英,李列.串联SRME在涠西南地区多次波衰减中的应用[J].物探与化探,2013,37(5):911-915.Shi Wen-Ying,Li Lie.The application of series SRME method to multiple wave attenuation in southwest Weizhou area[J].Geophysical&Geochemical Exploration,2013,37(5):911-915.
[10]马继涛,Sen K M,陈小宏,姚逢昌.海底电缆多次波压制方法研究[J].地球物理学报,2011(11):2960-2966.Ma J T,Sen K M,Chen X H.OBC multiple attenuation technique using SRME theory[J].Chinese Journal of Geophysics,2011(11):2960-2966.
[11]郝振江,冯飞,王得利,等.Curvelet域海底电缆多次波压制方法研究[J].世界地质,2013,32(1):130-136.Hao Zhen-Jiang,Feng Fei,Wang De-Li,et al.Research on OBC multiple wave attenuation method in Curvelet domain[J].Global Geology,2013,32(1):130-136.
[12]谭军,李金山,宋鹏,等.基于同相轴优化追踪的多次波匹配衰减方法[J].中国石油大学学报(自然科学版),2016,40(6):40-49.TAN Jun,LI Jinshan,SONG Peng,et al.Multiple matching attenuation method based on optimized event tracing[J].Journal of China University of Petroleum(Edition of Natural Science),2016,40(6):40-49.
[13]Treitel S.Principles of digital multichannel filtering[J].Geophysics,1970,35(5):785-811.
[14]Wang Y.Multiple subtraction using an expanded multichannel matching filter[J].Geophysics,2003,68(1):346-354.