![]() Extracting wavelets is a whole other post. Don't extract a wavelet till you have a few good ties with a zero-phase wavelet, then extract from several wells and average.Look at the bandwidth of your seismic and make an equivalent zero-phase wavelet.Edit as gently and objectively as possible.Chop any casing velocities or other non-data off the top of your log.Ask people, look at SEGY headers, but don't be satisfied with one data point. And get your datums straight, especially if you are on land: make certain your seismic datum is correct. Use a volume with less filtering if you have it (and you should be asking for it). Keep it to the nears if possible (don't use a full-angle stack unless it's all you have). Rachel Newrick's essays in 52 Things are essential. Next, think about the seismic volume you are trying to tie to. White & Simm (2003) in First Break 21 (10) is excellent. How else can we explain the fact that any reasonably mature exploration project has at least 17 time-depth curves per well, with names like JLS_2002_fstk01_edit_cks_R24Hz_final? My top tipsįirst, read up. I'd go so far as to say that I think tying wells robustly is one of the unsolved problems of subsurface geoscience.
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