Survey “Log”
- Sequence of successive survey “stations”
- Same tool, same processing
Wellpath = Concatenated Survey Logs
- Second survey is “tied-on” to first, etc.
The effect of introducing a tie-on
- Single log, no tie-on
- 6 logs, 5 tie-ons
Why?
- The error model
Correlation coefficients – Propagation Mode
- 0 = uncorrelated
- 1 = correlated
Which terms are affected by tie-on?
- “Systematic” terms
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Harry Wilson