地震波逆时偏移成像与哈夫曼编码的应用研究
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摘要
逆时偏移成像精准,但是其偏移时计算机机时过长的问题一直困扰着逆时偏移的实际应用。以缩短逆时偏移的计算机机时为目的,在分析了造成计算机机时过长的原因的基础上,采用基于图像编码的哈夫曼编码方法缩减逆时偏移计算时的内存占有量,从而解决计算机机时过长的问题,通过对Marmousi模型的叠前深度逆时偏移处理,由偏移成像结果可见提出的将哈夫曼编码应用于逆时偏移成像不仅能够解决逆时偏移计算机机时过长的问题,而且具有良好的成像效果。
Reverse Time Migration is a precise migration methods, however, RTM spends too long computer time which impedes its development. In the paper, the aim is to save the computer time based on analyzing the reason of it, and the Huffman coding is employed into RTM for saving the memory consumption to reduce the computer time. Marmousi model is used and the migration results illustrate that the method not only can solve the long computer time problem, but also acquire the comparative imaging accuracy.
Reverse Time Migration is a precise migration methods, however, RTM spends too long computer time which impedes its development. In the paper, the aim is to save the computer time based on analyzing the reason of it, and the Huffman coding is employed into RTM for saving the memory consumption to reduce the computer time. Marmousi model is used and the migration results illustrate that the method not only can solve the long computer time problem, but also acquire the comparative imaging accuracy.
引文
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[6]杨勤勇,段心标.逆时偏移技术发展现状[J].石油物探,2010,49(1):92-99.
[7]Zhang Y,Sun J.Practical issues in reverse time migration:true amplitude gathers,noise removal and harmonic source en-coding[J].First Break,2009,27:53-59.
[8]Loewenthal D,Mufti I R.Reverse time migration in spatial frequency domain[J].Geophysics,1983,48(5):627-635.
[9]Bleistein N,Stockwell J W.Mathematics of multidimensional seismic imaging,migration,and inversion[M].New York:Springer-Verlag,2001.
[10]Guan H,Li Z,Wang B.A multi-step approach for efficirnt reverse-time migration[C]//Expanded Abstracts of78th An-nual SEG Mtg,Las Vegas,Nevada,2008:2341-2345.
[11]Zhang Y,Sun J.Practical issues in reverse time migration:true amplitude gathers,noise removal and harmonic source encoding[J].First Break,2009,27:53-59.
[12]Zhang Xiaodan,Zhang Zhiyu,Ke Xizheng.Research on the pre-stack reverse time migration image[C]//2010Second IITA International Conference on Geoscience and Remote Sensing,Qingdao,China,2010:57-60.
[13]于晓宇.静止图像压缩算法的研究[D].成都:电子科技大学,2009.
[14]冯蕾,彭长根,彭延国.基于哈夫曼树的无证书公钥广播加密方案[J].计算机工程与应用,2012,48(24):85-87.
[15]汪林,殷福亮,陈喆.一种基于八叉树的Huffman解码方法及其在MPEG-4中的应用[J].电子与信息学报,2008,30(8):1861-1864.
[2]刘红伟,刘洪,李博,等.起伏地表叠前逆时偏移理论及GPU加速技术[J].地球物理学报,2011,54(7):1883-1892.
[3]Symes W W.Reverse time migration with optimal checkpoin-tint[J].Geophtsics,2007,72(5):213-221.
[4]Karazinicir M H,Gerard C M.Explicit high-order reverse time pre-stack depth migration[C]//Expanded Abstracts of76th Annual Internat SEG Mtg,New Orleans,Louisian,2006:2353-2357.
[5]Zhang Y,Sun J,Gray S.Reverse-time migration:amplitude and implementation issues[C]//Expanded Abstracts of77th Annual SEG Mtg,San Antonio,Texas,2007:2145-2149.
[6]杨勤勇,段心标.逆时偏移技术发展现状[J].石油物探,2010,49(1):92-99.
[7]Zhang Y,Sun J.Practical issues in reverse time migration:true amplitude gathers,noise removal and harmonic source en-coding[J].First Break,2009,27:53-59.
[8]Loewenthal D,Mufti I R.Reverse time migration in spatial frequency domain[J].Geophysics,1983,48(5):627-635.
[9]Bleistein N,Stockwell J W.Mathematics of multidimensional seismic imaging,migration,and inversion[M].New York:Springer-Verlag,2001.
[10]Guan H,Li Z,Wang B.A multi-step approach for efficirnt reverse-time migration[C]//Expanded Abstracts of78th An-nual SEG Mtg,Las Vegas,Nevada,2008:2341-2345.
[11]Zhang Y,Sun J.Practical issues in reverse time migration:true amplitude gathers,noise removal and harmonic source encoding[J].First Break,2009,27:53-59.
[12]Zhang Xiaodan,Zhang Zhiyu,Ke Xizheng.Research on the pre-stack reverse time migration image[C]//2010Second IITA International Conference on Geoscience and Remote Sensing,Qingdao,China,2010:57-60.
[13]于晓宇.静止图像压缩算法的研究[D].成都:电子科技大学,2009.
[14]冯蕾,彭长根,彭延国.基于哈夫曼树的无证书公钥广播加密方案[J].计算机工程与应用,2012,48(24):85-87.
[15]汪林,殷福亮,陈喆.一种基于八叉树的Huffman解码方法及其在MPEG-4中的应用[J].电子与信息学报,2008,30(8):1861-1864.
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