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Stretch-free generalized normal moveout correctionNormal access

Authors: J.H. Faccipieri, T.A. Coimbra and R. Bloot
Journal name: Geophysical Prospecting
Issue: Vol 67, No 1, January 2019 pp. 52 - 68
DOI: 10.1111/1365-2478.12702
Organisations: Wiley
Language: English
Info: Article, PDF ( 3.68Mb )

Summary:
The effective application of normal moveout correction processes mainly depends on four factors: the chosen traveltime approximation, the stretching associated with the given traveltime, crossing events and phase changes, the last two being inherent to the seismic data. In this context, we conduct a quantitative analysis on stretching considering a general traveltime expression depending on half-offset and midpoint coordinates. Through this analysis, we propose a mathematically proven procedure to eliminate stretching, which can be applied to any traveltime approximation. The proposed method is applied to synthetic and real data sets, considering different traveltime approximations and achieved complete elimination of stretching.

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