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基于匹配追踪算法的频谱成像技术及其应用

Keywords: 匹配追踪,尺度参数,频谱成像,分辨率,火成岩储层

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Abstract:

?本文研究了liu等提出的基于morlet小波的匹配追踪(mmp)算法,并将该算法中固定的尺度参数k改进为可灵活变化的自由尺度,形成了具有自由尺度参数的emmp算法,提高了算法的实用性和灵活性。理论模型验证及实际资料应用结果表明:①emmp算法较短时傅里叶变换(stft)、小波变换(wt)等传统方法,具有更高的时频分辨率;②emmp算法中的原子结构具有自由尺度,原子结构更加灵活,解决了mmp算法中难以确定最优尺度的问题,从而使时频原子库对非平稳地震信号具有更强的匹配能力;③利用emmp算法、mmp算法对qk凹陷zh区及jh区地震资料的频谱成像结果说明,emmp算法较mmp算法具有更高的横向分辨率,对应火成岩反射主频率的分频切片能清晰地刻画火成岩储层边界。

References

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