| 基于信号估计的高分辨率叠加速度分析 |
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| 引用本文： | 陆文凯,张学工,李衍达,何汉猗,温书亮,刘永江.基于信号估计的高分辨率叠加速度分析[J].地球物理学报,2001,44(6):872-877. |
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| 作者姓名： | 陆文凯 张学工 李衍达 何汉猗 温书亮 刘永江 |
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| 作者单位： | 1. 清华大学自动化系,北京,100084;
2. 海洋石油勘探开发研究中心,高碑店,074010 |
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| 基金项目： | 国家“86 3”资助项目 ( 86 3-82 0 -0 5 -0 1 ) |
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| 摘 要： | 如何得到高分辨率的叠加速度谱是高分辨率地震资料处理的关键.本文在分析地震共中心点(CDP)道集的振幅随偏移距变化(AVO)特性的基础上,提出一种信号模型来逼近CDP道集,然后利用优化技术估计信号,并采用信号估计误差实现信号检测,从而提出一种新的基于信号检测和估计的高分辨率叠加速度谱分析方法.文中的方法充分利用地震信号波形中所包含的速度信息.
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| 关 键 词： | 叠加速度 信号估计 模型优化 |
| 文章编号： | 0001-5733(2001)06-0872-06 |
| 收稿时间： | 2000-03-02 |
HIGH RESOLUTION STACK VELOCITY DETERMINATION BASED ON SIGNAL ESTIMATION |
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| LU WEN,KAI\ ZHANG XUE,GONG\ LI YAN,DA.HIGH RESOLUTION STACK VELOCITY DETERMINATION BASED ON SIGNAL ESTIMATION[J].Chinese Journal of Geophysics,2001,44(6):872-877. |
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| Authors: | LU WEN KAI\ ZHANG XUE GONG\ LI YAN DA |
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| Institution: | 1. Department of automation, Tsinghua University, Beijing 100084, China;
2. CNOOC,Gaobeidian 074010,China |
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| Abstract: | To get high resolution stack velocity spectrum, which is an important parameter, is the key in seismic signal processing. We propose a novel technique of high resolution velocity determination with signal estimation and detection technique. The common depth point (CDP) gather can be modeled into the integration of curve clusters whose shape decided by the velocity and the time of zero offset, and the amplitudes along the curve vary with the offset in consideration of the AVO property. Model optimum technique is used to estimate the AVO parameters. The error of the estimated signal measures the possibility of the parameter (velocity). The new measure can use more effectively the velocity information in the waveform. The described method is tested by synthetic and field data. In both cases, we obtained a remarkable improvement in the time velocity resolution with strong noise repellent. |
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| Keywords: | Stack velocity Signal estimation Model optimum |
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