MODELing with resistivity data
Case History - Fisher Good Editing
The close match of the edited logs to the original (where no editing was required) demonstrate the calibration of parameters. Rational logs are generated where bad hole effects seriously degrade both original sonic and density. The synthetic seismogram has no spurious reflections and horizon time picks are reliable.
The method is described in more detail in "An economic approach to sonic error corrections: The EASElog process"; Fischer, J.G., Good, W.F.; p. ??, SEG 1985. This example was prepared by Harold Ryan using the seismic modeling module of the author's LOG/MATE software package.
Case History - Faust and Smith Editing
is clear that reasonable sonic, and also density if needed, can
be generated by these techniques. The error traces help identify
the places to concentrate effort. Places where the error is
small identify reasonable good original log data and where
parameters can be refined by successive iterations. These
illustrations are from "In search of the well tie: what if I
don't have a sonic log?"; Adcock,S.; SEG Leading Edge, p.
1161-1164, Dec 1993.
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