基于频率慢度域二阶算子的多次波去噪方法研究及应用
|
摘要
水层多次波和层间多次波干扰是在海上地震数据处理中的常见问题。当介质是横向变化较弱的地区和中等硬度的海底反射时,这些反射可以通过预测反褶积来压制;然而当海底非常坚硬且不规则时,海底构造与一维地球模型的不一致会使传统的去噪方法失效。频率慢度域二阶算子(Remul方法)是以地震正演数据模型为基础,推导了在线性拉东变换(T—p域)中的多次波压制因子。由于它是基于反射数据的模型,既考虑了水层多次波,又考虑了微屈多次波,所以压制因子和数据模型的一致性可以提高反褶积的效果。运用该方法在M工区进行了实验,结果表明,层间多次波得到了有效压制,有效波得到了较好恢复。
Disturbance of water layer multiples and interbed multiples are the frequently encountered problems in seismic data processing. When the medium is the region of a weak lateral variation and moderate hard bottom reflect,these reflections can be suppressed by predictive deconvolution.However,when the seabed is very hard and irregular,seafloor structures inconsistent with one-dimensional model of the earth would also lead to failure of the traditional methods.The second order operator in frequency-slowness domain method is based on the seismic forward model,and it has deduced the multiple-wave suppression factor in linear radon transform(domain).Because it is based on reflection data model,and taking not only water layer multiples into account simultaneously,but also the peg-leg multiples,so,the consistency of suppression factors and data models can be a feasible way to improve the effectiveness of deconvolution.We implemented this method experiment in M area,the results show that the interbed multiples get effective suppression and effective waves are well restored.
Disturbance of water layer multiples and interbed multiples are the frequently encountered problems in seismic data processing. When the medium is the region of a weak lateral variation and moderate hard bottom reflect,these reflections can be suppressed by predictive deconvolution.However,when the seabed is very hard and irregular,seafloor structures inconsistent with one-dimensional model of the earth would also lead to failure of the traditional methods.The second order operator in frequency-slowness domain method is based on the seismic forward model,and it has deduced the multiple-wave suppression factor in linear radon transform(domain).Because it is based on reflection data model,and taking not only water layer multiples into account simultaneously,but also the peg-leg multiples,so,the consistency of suppression factors and data models can be a feasible way to improve the effectiveness of deconvolution.We implemented this method experiment in M area,the results show that the interbed multiples get effective suppression and effective waves are well restored.
引文
[1]Dmitri Lokshtanov.Multiple suppression by single channel and multichannel deconvolution in the tau-p domain[J].SEG Expanded Abstracts,1995,14:1482-1485.
[2]Berkhout A J,de Graaff M P.The inverse scattering problem in terms of multiple elimination and seismic migration[J].SEG Expanded Abstracts,1982,1:113-114.
[3]Verschuur D J,Berkhout A J.Estimation of multiple scattering by iterative inversion,Part 2,practical aspects and examples[J].Geophysics, 1997,62(5):1596-1611.
[4]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.
[5]王汝珍.多次波识别与衰减[J].勘探地球物理进展,2003,26 (5/6):423-432.
[6]牛滨华,沈操,黄新武,等.波动方程多次波压制技术的进展[J].地球物理学进展,2002,17(3):480-485.
[7]李振春,张军华.地震数据处理方法[M].东营:石油大学出版社,2004:56-92.
[8]于海铖,周小平.模型子波处理技术在消除地震相位差异中的应用[J].油气地质与采收率,2010,17(4):33-34,42.
[9]黄新武,孙春岩,牛滨华,等.基于数据一致性预测与压制自由表面多次波——理论研究与试处理[J].地球物理学报,2005, 48(1):173-180.
[2]Berkhout A J,de Graaff M P.The inverse scattering problem in terms of multiple elimination and seismic migration[J].SEG Expanded Abstracts,1982,1:113-114.
[3]Verschuur D J,Berkhout A J.Estimation of multiple scattering by iterative inversion,Part 2,practical aspects and examples[J].Geophysics, 1997,62(5):1596-1611.
[4]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.
[5]王汝珍.多次波识别与衰减[J].勘探地球物理进展,2003,26 (5/6):423-432.
[6]牛滨华,沈操,黄新武,等.波动方程多次波压制技术的进展[J].地球物理学进展,2002,17(3):480-485.
[7]李振春,张军华.地震数据处理方法[M].东营:石油大学出版社,2004:56-92.
[8]于海铖,周小平.模型子波处理技术在消除地震相位差异中的应用[J].油气地质与采收率,2010,17(4):33-34,42.
[9]黄新武,孙春岩,牛滨华,等.基于数据一致性预测与压制自由表面多次波——理论研究与试处理[J].地球物理学报,2005, 48(1):173-180.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心