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A Time-Synchroextracting Transform for the Time–Frequency Analysis of Seismic Data

机译:用于地震数据时频分析的时间同步提出转换

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摘要

One important application of time-frequency analysis (TFA) is seismic spectral decomposition for reservoir characterization. However, traditional seismic TFA techniques are usually limited by diffused TF distribution, which can result in unreliable seismic interpretations. Synchrosqueezing transform (SST) is an effective TFA method that improves the concentration of the TF representation (TFR) of nonstationary signals. However, for the signal with a rapidly varying instantaneous frequency, the SST method suffers from a blurred TFR. In this letter, we propose a novel TFA method called time-synchroextracting transform (TSET) that provides highly concentrated TFR for transient signals where the TF curve is nearly parallel to the frequency axis. We applied the proposed TSET to synthetic signals and field seismic data to verify its validity of time localization and effective delineation of subsurface geological information.
机译:时频分析(TFA)的一个重要应用是储层表征的地震光谱分解。然而,传统地震TFA技术通常受扩散TF分布的限制,这可能导致不可靠的地震解释。 SynchroSqueezing变换(SST)是一种有效的TFA方法,可提高非间断信号的TF表示(TFR)的浓度。然而,对于具有快速变化的瞬时频率的信号,SST方法遭受模糊的TFR。在这封信中,我们提出了一种名为Time-Synchroextracting变换(TSet)的新型TFA方法,为瞬态信号提供高度集中的TFR,其中TF曲线几乎平行于频率轴。我们将建议的TSet应用于合成信号和现场地震数据,以验证其时间本地化的有效性和有效描绘地下地质信息。

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