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EMAT ACOUSTIC SIGNAL MEASUREMENT USING MODULATED GAUSSIAN WAVELET AND HILBERT DEMODULATION
EMAT ACOUSTIC SIGNAL MEASUREMENT USING MODULATED GAUSSIAN WAVELET AND HILBERT DEMODULATION
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机译:调制高斯小波和希尔伯特解调的信号声信号测量
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摘要
Casing signals generated by an EMAT in a borehole are processed using at least two orthogonal band-limited filters. The band-limited filters may include Gaussian or Cauchy Wavelet filters. By using the Hilbert transform, an envelope of the filtered signals is determined and amplitudes and arrival times of individual arrivals are estimated. These can be used to estimate casing and cement properties.
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