« Subsurface Analytics
Core-Log Depth Misalignment QC
Flags core samples whose density-derived porosity disagrees with lab-measured porosity, at both the individual-sample and physical-core-run level -- a QC signal for bad depth ties.
wells
1326
groups
5189
clean groups
4394
matched pairs
212446
point outliers
7849
shift candidates
555
insufficient data groups
240
excluded null core number
4491
Last run: 2026-07-29 13:07:31 UTC
How this result was generated
graph TD
pairing["Depth-Matched Pairing"]
estimate["Density-Derived Porosity"]
compare["Residual"]
pointcheck["Modified Z-Score
(point-level)"] groupcheck["Binomial Sign Test
(group-level)"] flagged["Flagged Findings"] pairing --> estimate --> compare compare --> pointcheck compare --> groupcheck pointcheck --> flagged groupcheck --> flagged
(point-level)"] groupcheck["Binomial Sign Test
(group-level)"] flagged["Flagged Findings"] pairing --> estimate --> compare compare --> pointcheck compare --> groupcheck pointcheck --> flagged groupcheck --> flagged
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Wellbore coverage
n = 2395 wells with any core sample record
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