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Abstract

Summary

For many years inverse Q has been applied to poststack data as a means of enhancing the temporal resolution of a dataset thus improving its interpretability. Typically, the problem encountered is that the high-frequency noise tends to be boosted too much. The amount of gain (boosting) applied can be limited to keep the signal-to-noise ratio within acceptable limits for a given frequency range. Many applications of inverse Q have parameters such a reference frequency for gain control and gain limit to restrict the boosting done at the higher frequencies. More recently, inverse Q has been applied to gathers after prestack-time migration and these gathers have been used to produce full-fold and angle stacks with the aim of doing amplitude versus offset (or angle) work on these datasets. By means of a simple synthetic event it is shown here that when a gain limit is used within the inverse Q then the amplitude variation with offset is distorted. The Q application method described here prevents such distortion.

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/content/papers/10.3997/2214-4609.201901142
2019-06-03
2024-03-28
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References

  1. Hardwick, A.J., Woods, D., Masoomzadeh, H. and Clark, R.
    [2017] Improved Q Estimation and Application in the Time Domain with Broadband Seismic Data from the North Sea. 79th EAGE Conference & Exhibition, Extended Abstracts, WE A2 09, 10.3997/2214‑4609.201701150.
    https://doi.org/10.3997/2214-4609.201701150 [Google Scholar]
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