Stage 2: Sw Validation (All Formations, Data-Discovered)
Same Sw validation as the main Stage 2 card, but over formations discovered directly from the data instead of the fixed 10 -- so real, known pay sitting outside that original list (like well 9/09a- 11's Beryl Formation gas shows) now actually gets checked. Requires the 'Rw Calibration (All Formations)' card to have been run first -- this reads the Rw values that card saves.
What "accuracy" means here: Same caveat as the main Sw Validation card: "hydrocarbon-bearing" means WellStrat's own recorded per-interval flag, not an independently verified test result. The formation list here is discovered from the data, not hand-picked, so results are not directly comparable well-for-well to the original 10-formation card -- this one simply covers more ground.
Last run: 2026-08-01 18:49:42 UTC
How this result was generated
Enough Qualifying Wells"] sand["Predicted-Sand Depths Only"] rw["Look Up Rw (from the
All-Formations Rw card)"] sw["Compute Sw (Archie's Equation)"] truth["Was This Depth Already Flagged
Hydrocarbon-Bearing?"] compare["Compare Low-Sw Calls
Against That Flag"] discover --> sand --> rw --> sw --> compare truth --> compare
Hover a step for a plain-language explanation.