利用LIFT技术衰减海上近道多次波
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摘要
近道多次波压制是目前海上地震资料处理的一大难题,特别是在浅层气的影响下,近道多次波更是难以压制。常规近道多次波衰减技术在压制多次波的同时,有效信号也受到压制。为此,提出了一种有效衰减近道多次波的LIFT技术,该技术针对有效反射在近中远偏移距均有分布,而近道多次波主要集中在近道的特点,基于局部时窗的AVO原理模拟有效信号,从而达到信噪分离的目的。实际资料处理证实了该技术既能有效衰减近道多次波,又能很好地保留有效信号。
Near-offset multiples are difficult to be removed in offshore seismic data,especially when the data were affected by shallow gas during acquisition. Traditional techniques used for near-offset multiple suppression may do harm to the effective signal. In this article,LIFT technique is adopted to attenuate multiples. The main theory is that the near-offset multiples can only distribute in near offset gathers whereas effective reflections mainly distribute in medium and large offset gathers. According to AVO theory,this method separates signals and noises in a time window. The effectiveness of this method was verified on real data.
Near-offset multiples are difficult to be removed in offshore seismic data,especially when the data were affected by shallow gas during acquisition. Traditional techniques used for near-offset multiple suppression may do harm to the effective signal. In this article,LIFT technique is adopted to attenuate multiples. The main theory is that the near-offset multiples can only distribute in near offset gathers whereas effective reflections mainly distribute in medium and large offset gathers. According to AVO theory,this method separates signals and noises in a time window. The effectiveness of this method was verified on real data.
引文
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2李来林,魏大力.LIFT去噪方法在地震资料处理中的应用[J].石油物探,2007,46(2):193~195
3Choo J,Sudhakar V.A new seismic processing tech-nique to LIFT noise and multiple[A].In:CSPG.Ex-pand abstracts2003CSEG/CSPGJoint National Con-vention[C].Calgary:[s.n.],2003
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7李鹏,刘伊克,常旭,等.多次波问题的研究进展[J].地球物理学进展,2006,21(3):888~897
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9罗小佳,朱仕军,刘二军.最优化相似加权Radon变换压制多次波[J].勘探地球物理进展,2009,32(3):186~188
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14赵军才,李铮,崔喜凤.塔中沙漠区地震资料静校正和去噪[J].勘探地球物理进展,2004,27(2):123~127
15张军华,吕宁,田连玉,等.地震资料去噪方法技术综合评述[J].地球物理学进展,2006,21(2):546~553
16李丽青,梁蓓雯,徐华宁.海上单道地震资料中多次波的衰减[J].石油物探,2007,46(5):457~462
17张军华,缪彦舒,郑旭刚,等.预测反褶积去多次波几个理论问题探讨[J].物探化探计算技术,2009,31(1):6~10
18贾丽华,吴长江,罗焱鑫,等.地震资料高分辨率处理技术[J].石油物探,2002,41(4):484~488
19Neidell N S.Amplitude variation with offset[J].The Leading Edge,1986,5(1):65~67
20万欢.高保真多次波剔除法及其在海上地震资料处理中的应用[J].中国海上油气,2005,17(3):163~166
2李来林,魏大力.LIFT去噪方法在地震资料处理中的应用[J].石油物探,2007,46(2):193~195
3Choo J,Sudhakar V.A new seismic processing tech-nique to LIFT noise and multiple[A].In:CSPG.Ex-pand abstracts2003CSEG/CSPGJoint National Con-vention[C].Calgary:[s.n.],2003
4赵建章,张进铎,赖江德.海南特殊地理环境下的地震资料处理技术研究[J].勘探地球物理进展,2008,31(3):201~205
5渥.伊尔马滋.地震资料分析——地震资料处理、反演和解释[M].刘怀山,王克斌,童思友,等译.北京:石油工业出版社,2006.1~1508
6马义忠,于更新,符力耘.复杂地表低信噪比地震数据处理研究[J].地球物理学进展,2008,23(6):1849~1858
7李鹏,刘伊克,常旭,等.多次波问题的研究进展[J].地球物理学进展,2006,21(3):888~897
8王汝珍.多次波识别与衰减[J].勘探地球物理进展,2003,26(5/6):421~432
9罗小佳,朱仕军,刘二军.最优化相似加权Radon变换压制多次波[J].勘探地球物理进展,2009,32(3):186~188
10Wiggins J W.Attenuation of complex water-bottom multiples by wave-equation-based prediction and sub-traction[J].Geophysics,1988,53(12):1527~1539
11Wang Y.Multiple predictionthroughinversion:Afully data driven concept for surface-related multiple attenu-ation[J].Geophysics,2004,69(2):547~553
12李振勇,姜浩,李东升.海洋地震数据处理技术探讨[J].石油地球物理勘探,2007,42(增刊):8~13
13王彦江.中国东部某浅海区多次波压制研究[J].勘探地球物理进展,2009,32(3):189~194
14赵军才,李铮,崔喜凤.塔中沙漠区地震资料静校正和去噪[J].勘探地球物理进展,2004,27(2):123~127
15张军华,吕宁,田连玉,等.地震资料去噪方法技术综合评述[J].地球物理学进展,2006,21(2):546~553
16李丽青,梁蓓雯,徐华宁.海上单道地震资料中多次波的衰减[J].石油物探,2007,46(5):457~462
17张军华,缪彦舒,郑旭刚,等.预测反褶积去多次波几个理论问题探讨[J].物探化探计算技术,2009,31(1):6~10
18贾丽华,吴长江,罗焱鑫,等.地震资料高分辨率处理技术[J].石油物探,2002,41(4):484~488
19Neidell N S.Amplitude variation with offset[J].The Leading Edge,1986,5(1):65~67
20万欢.高保真多次波剔除法及其在海上地震资料处理中的应用[J].中国海上油气,2005,17(3):163~166
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