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Multichannel Complex Seismic Traces Analysis

机译:多通道复杂地震痕迹分析

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Instantaneous seismic attributes are commonly used in assisting seismic interpretation and stratigraphy analysis. We compute the instantaneous seismic attributes using 1-D seismic traces and the corresponding quadrature (Hilbert transformed) traces. However, the 1-D seismic trace and the corresponding quadrature trace are sensitive to noise and seismic processing artifacts. To improve the lateral continuity of instantaneous seismic attributes, we propose to compute instantaneous attributes using multichannel seismic traces. Dynamic time warping (DTW) is used to align the seismic traces centered at the analysis point which mitigates the effect of structure dip on the multichannel complex seismic trace analysis (MCSTA). We fine interpolate the 1-D seismic traces to minimize the possible error in the computation of the error matrix of DTW. We also define a constraint in the backtracking of DTW to avoid severe strain (stretch or squeeze) between seismic traces. We obtain the "robust" 1-D complex seismic trace by applying Gaussian smoothing to the aligned complex seismic traces. We finally obtain instantaneous seismic attributes from the smoothed 1-D seismic trace and the corresponding quadrature trace. We show the superiority of new instantaneous attributes by applying our method to real seismic data.
机译:瞬时地震属性通常用于辅助地震解释和地层分析。我们使用1-D地震迹线和相应的正交(HILBERT转换)痕迹来计算瞬时地震属性。然而,1-D地震迹线和相应的正交迹线对噪声和地震处理伪影敏感。为了提高瞬时地震属性的横向连续性,我们建议使用多通道地震迹线来计算瞬时属性。动态时间翘曲(DTW)用于对准处于分析点的地震痕迹,这些迹线缓解了结构浸在多通道复合地震轨迹分析(MCSTA)上的结构浸渍的效果。我们精细插入1-D地震迹线,以最小化DTW的误差矩阵计算中的可能误差。我们还定义了DTW的回溯中的约束,以避免地震迹线之间的严重应变(拉伸或挤压)。通过将高斯平滑施加到对齐的复杂地震迹线,我们获得“鲁棒”1-D复杂的地震轨迹。我们最终从平滑的1-D地震轨迹和相应的正交轨道获得瞬时地震属性。我们通过将方法应用于真实地震数据来展示新的瞬时属性的优越性。

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