| 单程波法地震波衰减特征数值模拟分析 |
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| 引用本文： | 张璐,白晓寅.单程波法地震波衰减特征数值模拟分析[J].物探化探计算技术,2009,31(6):541-547. |
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| 作者姓名： | 张璐 白晓寅 |
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| 作者单位： | 1. 中国石油大学,山东,257061;中国石油勘探开发研究院,西北分院,兰州,730020
2. 东方地球物理公司物探技术研究中心,河北,072750 |
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| 摘 要： | 在非均匀粘弹性介质中，地震波衰减研究能够有效揭示地层吸收特性对地震波的影响。这里从单程波方程出发，结合粘弹性介质中的复波数理论，考虑介质的横向变化，采用分步傅立叶波场延拓技术，推导出适用于横向变速介质的带Q地震记录计算公式，最后将此方法应用于四个不同含Q地层模型。试验表明：单程波法计算速度快，波场信息简单清晰，易于深入分析和反演算法的建立。并且，Q值对地震波波形、能量、频率等都产生了较为明显的影响，对实际资料能量补偿、地震资料分辨率的提高，以及利用衰减特征进行储层识别有一定指导价值。
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| 关 键 词： | 单程波法 地震波衰减 Q值 数值模拟 |
Numerical simulation analysis of the characteristic of seismic wave attenuation based on one-way wave equation |
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| ZHANG Lu,BAI Xiao-yin.Numerical simulation analysis of the characteristic of seismic wave attenuation based on one-way wave equation[J].Computing Techniques For Geophysical and Geochemical Exploration,2009,31(6):541-547. |
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| Authors: | ZHANG Lu BAI Xiao-yin |
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| Abstract: | The seismic wave attenuation study in non-uniform viscoelastic medium could reveal how absorption influences the characteristics of seismic waves. Based on the one-way wave equation, combining with viscoelastic media complex wave number theory, considering lateral variation and using split-step Fourier wave field continuation techniques, a seismic records formula concluding Q has been established which is suitable for the horizontal transmission medium. This method has been applied to four different Q-bearing models. The result shows: one-way wave equation has fast computed-speed, clear and simple wave field which is easy to analysis and establish the inversion algorithm; Q value effects the seismic waveform, energy, frequency and so on, which benefit the further research such as seismic energy compensation, improvement of seismic resolution, concealed reservoir discrimination. |
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| Keywords: | one-way wave method seismic attenuation Q value numerical simulation |
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