Everyday complex engineering —
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Global offshore field drill-down — fields, wells, and country rollups built from BSEE and public regulatory filings.

Coverage is primarily US Gulf of Mexico deepwater (BSEE) plus selected international basins; not a complete global census. Published fields emphasize operational, geological, production, and provenance attributes. Economics are intentionally absent from this table while the upstream economics configuration is being republished and reviewed.

Standard-traceable parametric result grids — mooring fatigue (S-N), synthetic-rope fatigue (T-N), and riser code-check utilisation — from digitalmodel's validated reduced-order atlases.

Synthetic parametric sweeps generated from the cited standards (DNV-RP-C203, DNV-OS-E301, API-RP-2RD) and validated to under 10% max relative error against held-out samples. For screening and capability demonstration — not a substitute for a project-specific engineering check.

Field-economics sensitivity sweep — how life-to-date pretax NPV moves with WTI price and discount rate, on public BSEE production.

— data pending publication

Bore-by-bore drilling & completion days behind the World Oil April 2026 reconciliation — 253 wellbores across 11 Gulf of Mexico developments, with drilling-day stability proven across data vintages. Browse the interactive drill-down: /capabilities/dc-drilldown.html

Drilling days = spud to total depth; completion days = ALL post-TD rig time including later recompletion and servicing (the open worldenergydata#846 boundary question). Known caveat: the extractor mixes calendar days (spans under ~250 d) with WAR-union rig-days (longer spans), so batch-drilled wells undercount drilling days — disclosed rather than corrected pending resolution. Producer markers cover the seven core Lower-Tertiary fields only.

OpenFOAM VOF sloshing analysis for partially filled tanks — free-decay validation against closed-form theory, a forced-roll period sweep, and the connected twin-tank U-tube exchange mode with its inter-tank mass shift and roll moment.

Source-neutral reference geometry only — no vessel-specific dimensions are published here. Free-decay frequency matches closed-form theory to 0.30%. The exchange natural period is 14.31 s, measured by phase; the 22-24 s figure previously carried is the amplitude peak, which is loss-controlled and moves with roll amplitude. Damping is quadratic, so equivalent damping is a function of both period and roll amplitude (0.10 to 0.71 across the measured grid) and is not a tank constant. The inertia law predicts the exchange period to +/-3% across conduit areas 3.4-13.5 m2 and fills 25-70%; the loss law reproduces 35 cases to 8.6% rms; the tank moment is closed form to 4.3% rms for periods of 20 s and above, below which the legs' own sloshing modes participate. The former x1.45 magnitude residual is resolved, not carried: it is the weight moment of the whole fluid mass about the roll axis plus the within-leg free surface. Three of 57 cases are published accepted_with_exception for exceeding the 2% cycle-change limit.

Wall-thickness screening for a reference pipe across six design codes — utilisation and the governing check at each thickness, so the codes are directly comparable.

Reference pipe geometry only (323.9 mm OD) — no client or project-specific data. One row per (code, wall thickness). Utilisation above 1.0 means the check is not satisfied at that thickness; those rows are retained deliberately, because the sweep exists to show where each code turns. The per-check columns are sparse by design — codes do not share a check set, so a null means the code defines no such check, not a missing value. Screening only, not a project design check.

Cathodic-protection anode sizing across structures, climates and coating conditions, plus galvanic compatibility for every metal pair in three exposure environments.

Reference geometries only (a 4-leg jacket and an XL monopile) — no client or vessel-specific data. Anode sizing follows DNV-RP-B401 across 2 structures x 2 climates x 4 coating conditions x 7 design lives. Galvanic verdicts are anodic-index screening categories for all 16x16 metal pairs, including a metal against itself; they indicate where to look, and are not a substitute for a project-specific CP design. Environment allowable dV spans 0.15 V (harsh marine) to 0.5 V (controlled indoor).

Wall-thickness utilisation swept over three axes — thickness, effective tension and bending moment — across nine design codes, showing where combined loading rather than pressure becomes the governing limit state.

Reference pipe only — 323.9 mm OD, X65, internal 20 MPa / external 10 MPa. Tension and moment are swept from zero to 60% of capacity at the 18 mm reference wall (T_max 4.65 MN, M_max 355.6 kN·m), a range chosen from first-yield capacity rather than for appearance. Utilisation above 1.0 is retained deliberately: the sweep exists to show where each code turns, so filtering the failures would hide the answer. Per-check columns are sparse by design — the nine codes do not share a check set, so a null means that code defines no such check, not a missing value. Screening only; not a substitute for a project-specific design check.