Three Term AVO Waveform Inversion
Three Term AVO Waveform Inversion
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DOI：
10.1190/1.1851205
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
J. Downton;L. Lines
中科院分区：
文献类型：
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作者：
J. Downton;L. Lines
密度反射率是一种有用的AVO属性，可以用来推断流体饱和度。然而，由于逆问题的病态性质，难以获得准确的密度反射率估计。少量的噪声将导致估计中的大误差。为了提高反演的稳定性，需要大的角度和偏移距，但这些带来了它们自己的问题。动校正拉伸和偏移相关调谐是其中的两种。本文开发并演示了一种AVO波形反演，该反演将这些因素纳入其正演模型中，即使在存在这些因素的情况下也可以进行准确的估计。井约束和各种正则化策略，以进一步提高解决方案的可靠性。
Summary Density reflectivity is a useful AVO attribute to infer fluid saturation. However, accurate density reflectivity estimates are difficult to obtain due to the ill-conditioned nature of the inverse problem. A small amount of noise will lead to large errors in the estimates. To improve the stability of the inversion, large angles and offsets are required, but these bring their own problems. NMO stretch and offset dependent tuning are two of these. This paper develops and demonstrates an AVO waveform inversion that incorporates into its forward model these factors allowing for accurate estimates even in their presence. Well constraints and various regularization strategies are employed to further enhance the reliability of the solution.