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Free keywords:
seismic,
Ketzin,
high resolution
Abstract:
Local phase analysis can serve as a complementary tool in seismic interpretation because amplitude, peak frequency and phase of the locally observed wavelet are determined by the local reflectivity that is by layer thickness, type of impedance contrast, and boundary shape. To estimate the local phase, statistical methods like kurtosis-based phase estimation, can be applied. Their advantage is that they do not require well logs and analyze the seismic data directly, which allows for instance to analyze whether spatial and/or temporal variations occur in the amplitude and phase spectrum of the seismic wavelet. Here, we investigate the spatial resolution of the kurtosis-based phase estimation for the Ketzin 3D seismic data set from the Northeast German Basin and show that the decrease of phase estimation block size allows to estimate the spatial variations in the local phase and following also the local geology with high resolution. The phase distribution follows the geological structure of the anticline visible already in the amplitudes and may reveal potentially additional details to conventional amplitude imaging.
