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世界地质 2017, 36(4) 1258-1267 DOI:
ISSN: 1004-5589 CN: 22-1111/P |
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基础地质 |
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弹性高斯束偏移PS成像降维高效计算方法 |
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栗学磊,毛伟建 |
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1. 中国科学院测量与地球物理研究所 计算与勘探地球物理研究中心,武汉 430077; 2. 大地测量与地球动力学国家重点实验室,武汉 430077; 3. 国家超级计算深圳中心 (深圳云计算中心),广东 深圳 518055; 4. 中国科学院 深圳先进技术研究院,广东 深圳 518055 |
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摘要:
给出了 2D 弹性高斯束偏移公式推导,该偏移实现了准确的波型分离,压制多波之间串扰噪音。将声波高斯束偏移的降维高效算法推广到弹性高斯束偏移 PS 成像,通过重新设计中心点慢度分量和偏移距慢度分量,改进了该降维高效算法,实现了 PS 成像的降维高效计算。 |
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关键词:
弹性介质
高斯束偏移
PS 转换波
降维高效计算
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Elastic Gaussian beam migration and efficient computing method of PS imaging |
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LI Xue-lei ,MAO Wei-jian |
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1. Center for Computational & Exploration Geophysics,Institute of Geodesy and Geophysics,Chinese Academy of Sciences, Wuhan 430077,China; 2. State Key Laboratory of Geodesy and Earth's Dynamics,Wuhan 430077,China; 3. National Supercomputing Center in Shenzhen,Shenzhen 518055,Guangdong,China; 4. Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,Guangdong,China |
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Abstract:
The derivation of 2D elastic Gaussian beam migration is provided,in which the wave decomposition is completed accurately,and the crosstalk is eliminated effectively. Conventional efficient computing method of acoustic Gaussian beam migration is developed into PS imaging of elastic Gaussian beam migration. The authors propose a modified efficient computing method by rebuilding the expressions of mid-point slowness and offset slow- ness,which is suitable for PS imaging. |
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Keywords:
elastic media
Gaussian beam migration
PS imaging
efficient computing
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本刊中的类似文章 |
1.张志鹏,孙章庆,韩复兴,王雪秋,刘明忱,高正辉.影响高斯束偏移成像质量和效率的主要因素分析[J]. 世界地质, 2022,41(2): 349-364 |
2.逄硕, 刘财.非均匀弹性介质地震波场伪谱法正演模拟[J]. 世界地质, 2014,33(4): 934-939 |
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