Estimation of phase velocities and Q-factors from zero-offset, vertical seismic profile data
Estimation of phase velocities and Q-factors from zero-offset, vertical seismic profile data
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DOI：
10.1190/1.1443612
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发表时间：
1994-04
期刊：
影响因子：
3.3
通讯作者：
L. Amundsen;R. Mittet
中科院分区：
文献类型：
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作者：
L. Amundsen;R. Mittet
在地震处理中，我们面临着如何描述地震信号在传播过程中滞弹性衰减的影响的问题。为了解决这个问题，需要多孔流体填充岩石的近似物理性质。我们给出了一种通过反演在具有平面水平层的介质中采集的零偏移距垂直地震剖面（VSP）数据来估计粘弹性介质中控制波的吸收和频散的有效参数的策略。对VSP数据进行滤波，使得除了来自每个界面的直接下行波和主要反射波之外的所有能量归零。此过程要求模型的层厚度大于最小限制。必须用具有平均物理性能且厚度超过所需最小值的层来代替薄层堆叠。模型参数向量被划分为两个向量。第一个包含频率依赖的复传播速度在每一层，并在频率上进行评估…
In seismic processing, we face the problem of characterizing the effect of anelastic attenuation on the seismic signal during propagation. To solve this problem, approximate physical properties of the porous fluid‐filled rock are needed. We give a strategy for estimating effective parameters governing absorption and dispersion of waves in viscoelastic media by inverting zero‐offset vertical seismic profiling (VSP) data acquired in a medium with plane horizontal layers. The VSP data are filtered such that all energy except for the direct downgoing wave and the primary reflected wave from each interface is zeroed. This procedure requires a model with layer thicknesses greater than a minimum limit. A stack of thin layers must be replaced by a layer with average physical properties and with thickness exceeding the required minimum. The model parameter vector is partitioned into two vectors. The first contains the frequency‐dependent complex propagation velocity in each layer, and is evaluated over the frequen...