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A Application of adaptive generalized S transform in formation Q value extraction

机译：自适应广义S变换在地层Q值提取中的应用

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摘要

The quality factor Q is a dimensionless parameter which describes the intensity of seismic wave absorption by the incompletely elastic stratum. The frequency jump point exists in the seismic tuning non-stationary signal, which leads to the low precision of Q value estimation. In this paper, an adaptive generalized S transform is proposed to estimate the Q value, and the optimal window shape parameters are obtained by using the energy concentration evaluation method; then the single frequency Teager-Kaiser energy of seismic wave is used and its maximum value is taken as the instantaneous energy of time-frequency spectrum; finally, the relative attenuation of energy in the sampling period time is calculated, and the attenuation quasi-Q value is obtained. The application study of analog signals and real data shows that the Q value estimation method based on adaptive generalized S transform can adaptively adjust the window shape parameters according to the input signals, achieve local optimal time-frequency resolution, and improve the estimation accuracy of Q value.
机译：质量因子Q是一种无量纲参数，其描述了不完全弹性层的地震波吸收的强度。频率跳点存在于地震调谐非静止信号中，这导致Q值估计的低精度。本文提出了一种自适应广泛的S变换来估计Q值，并且通过使用能量浓度评估方法获得最佳窗口形状参数;然后使用地震波的单频茶叶kaiser能量，其最大值被视为时频谱的瞬时能量;最后，计算采样周期时间中的能量的相对衰减，获得衰减准Q值。模拟信号和实际数据的应用研究表明，基于自适应通用变换的Q值估计方法可以根据输入信号自适应地调整窗口形状参数，实现局部最佳时频分辨率，提高Q的估计精度。价值。

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