#World Oil April 2026 — per-well D&C days listing

One row per wellbore behind the field-level D&C reconciliation matrix in the validation page, section 3 — the "listing" requested in the QA/QC review so each development's total can be audited bore by bore against the article's Table 1.

#Definitions and basis

• Source: canonical extractor output drilling_and_completion_days_v21_kc.csv (V50 = wed basis, BSEE WAR vintage 2026-02-19): 253 wellbores across 26 leases, 11 developments.
• Drilling days = rig-days from spud to total depth (TD). Completion days = rig-days after TD — this includes later recompletion and well-servicing rig time, the accounting behaviour tracked in #846.
• Producer markers come from the OGOR-A well benchmark (56 producing wells across the seven core LT fields); its calendar-day columns are never used here.
• Sidetrack bores are identified by a non-zero API12 suffix (last two digits).

#Summary vs the article

Producer scope differs between the two counts: wed 56 spans the seven core LT fields including Big Foot (8) but has no markers for Buckskin; the article's 52 excludes Big Foot and includes Buckskin (4). A dash means no marker, which is a true zero for the pre-production developments (Kaskida, North Platte, Tiber) and a coverage gap for Buckskin.

The drilling / completion split is the first troubleshooting lever the article's Table 1 cannot provide: the deltas above (Jack St Malo +119, Shenandoah +24, Buckskin +52) trace to late-arriving well data and open-ended post-TD completion accounting — never to a change in any bore's drilling days. The vintage diff below proves it.

#Drilling-days resolution (frozen V30 → wed)

Per-bore diff of the frozen V30 workbook against the wed extract (committed as data/dc_vintage_diff.csv), answering whether drilling days are stable across data vintages:

• Drilling days changed on 0 of 253 bores. Once a bore reaches TD, its drilling-day count never moves — every bore populated in both vintages carries identical drilling days.
• 7 bores are late data, not reclassification: they sat in the frozen V30 workbook as zero-day placeholder rows (no spud/TD) and now carry real WAR days. These account for every apparent "drilling delta".
• Completion days are open-ended: 5 long-TD'd bores accrued additional post-TD servicing days (+104 days) with zero drilling movement — the #846 accounting behaviour.
• 36 bores exist only in wed: all 25 Buckskin bores (the recovered development) and 11 zero-day sidetrack stubs (Anchor, North Platte).

#Late-data bores (zero-day placeholders in frozen V30, real days now)

#Servicing accrual on long-TD'd bores (drilling unchanged)

Implication for the matrix: every difference against the article decomposes into (a) wells whose WAR data arrived after the article's extract and (b) open-ended post-TD completion accrual. Drilling days need no accounting decision — they are final as printed. The only open choice is the completion-day boundary rule (#846): where post-TD rig time stops counting as completion and becomes well servicing.

#Per-development listings

#Anchor — 17 bores · 821 drilling + 1,004 completion = 1,825 D&C days

#Buckskin — 25 bores · 1,043 drilling + 1,013 completion = 2,056 D&C days

Producer markers are unavailable for Buckskin (the OGOR-A benchmark covers the seven core LT fields; the article counts 4 producers).

#Cascade Chinook — 14 bores · 1,205 drilling + 1,262 completion = 2,467 D&C days

#Jack St Malo — 73 bores · 3,065 drilling + 3,982 completion = 7,047 D&C days

Bores split across two leases: Jack (8 bores, 1,117 D&C days) and St Malo (65 bores, 5,930 D&C days). The +119-day delta vs the article is tracked as issue #846; the two flagged bores below carry the entire +234-day frozen-vs-candidate difference.

#Julia — 9 bores · 802 drilling + 885 completion = 1,687 D&C days

#Kaskida — 7 bores · 556 drilling + 285 completion = 841 D&C days

#North Platte — 23 bores · 675 drilling + 296 completion = 971 D&C days

#Shenandoah — 23 bores · 1,363 drilling + 1,007 completion = 2,370 D&C days

#Stones — 22 bores · 1,457 drilling + 1,168 completion = 2,625 D&C days

+20 of these completion days accrued after the article's Nov-2025 cutoff as post-TD servicing on three wells (TD 2018–2022) — see validation section 3.1.

#Tiber — 2 bores · 214 drilling + 36 completion = 250 D&C days

#Big Foot — 38 bores · 1,235 drilling + 2,030 completion = 3,265 D&C days

+33 of these completion days accrued after the article's Nov-2025 cutoff as post-TD servicing on one well (TD 2020) — see validation section 3.1.

#Provenance

Generated by scripts/lower_tertiary/build_wo_per_well_dc.py from the committed canonical extractor output; totals are pinned to the validation-page matrix by tests/unit/lower_tertiary/test_wo_per_well_dc.py.