Traditionally, 3D seismic interpretation has been achieved through extraction of 2D sections around closed loops such that the beginning and end are coincident, a process known as loop tying (Lomask and Guitton, 2007). Using this approach it is often found that errors in picking result in misties. A more advanced method uses seed-based autotracking to extract horizons by correlation of local wavelet amplitude between neighboring traces; however, mis-ties may also occur here as two paths converge, again due to errors in picking. Additionally, these traditional amplitude-based autopickers can fail if the horizon being tracked has significant lateral amplitude variation or polarity reversal or in the presence of a large fault throw.

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