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- W2074419734 abstract "Summary Strong reflections in seismic data can often be matched with sharp outliers in the velocity function of the subsurface. This velocity function is generally known by means of the sonic Pvelocity log. The usual description of layering in the earth is by means of stepfunctions, by which only an approximated version of the outliers can be constructed. These outliers have different phase and amplitude effects on the angle dependent reflection response, compared with stepfunctions. We propose an effective parameterization for these outliers, which is a generalization of stepfunctions, for which we have closed-form implicit expressions for their effect on the reflected wave field. Using this model, we want to extract both a singularity parameter, which characterizes the singularity “strength” of the outlier, as well as the contrast of the P-wave velocities above and below the singular point. For this characterization we use the amplitudes in the continuous wavelet transform of the angle dependent reflectivity as well as the angle dependent instantaneous phase of the reflected wavefield. It is shown that it is possible to derive a consistent singularity parameter from both the well-log and the seismic reflection response, making use of the amplitudes in the continuous wavelet transform of the angle dependent reflectivity. Secondly, an inversion scheme is proposed, which makes use of both the former analysis and instantaneous phase information of the reflection event. With this scheme it is possible to derive the singularity parameter and the contrast of the P-wave velocities above and below the singular point from seismic reflection responses." @default.
- W2074419734 created "2016-06-24" @default.
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- W2074419734 date "1998-01-01" @default.
- W2074419734 modified "2023-09-27" @default.
- W2074419734 title "Characterization of reflectors by multi‐scale amplitude and phase analysis of seismic data" @default.
- W2074419734 cites W2152328854 @default.
- W2074419734 doi "https://doi.org/10.1190/1.1820249" @default.
- W2074419734 hasPublicationYear "1998" @default.
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