![]() Zero Phase Wavelet Two Minimum Phase Wavelets European Normal European Reverse (SEG Normal) Sound source (explosive, airgun) has minimum phase wavelet Most wavelet extracted from seismic data have mixed phase Minimum phase is a condition of a wavelet rather than a description of its shape. It is a characteristic of the seismic data that the bandwidth of the input signal is modified by earth filter Thus shallow targets will generally be characterized by good bandwidth whilst deeper targets will have poorer bandwidth The seismic wavelet is the result of addition of the sin wave functions at each frequency Amplitude and phase spectrum are another wavelet representation Phase Spectrum Amplitude Spectrum The seismic trace is composed of energy that has a range of frequencies. ![]() Objectives Determine key marker that need to be interpreted Understand seismic response in respect to the wells Determine the seismic phase Check the log qualityģ Convolution Model & Polarity ConventionĮuropean Normal European Reverse (SEG Normal)
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