economics refresh: curated EUR (#979), life-to-date NPV/breakeven (#976/#981), parametric_economics grid

README.md

@@ -14,6 +14,8 @@ configs:
   data_files: wells.parquet
 - config_name: countries
   data_files: countries.parquet
+- config_name: parametric_economics
+  data_files: parametric_economics.parquet
 ---
 
 # World Energy Field Explorer — analysis projection
@@ -30,6 +32,19 @@ Live Explorer: https://vamseeachanta.github.io/worldenergydata/field-atlas/
 | `fields` | 10 | Lower-Tertiary fields — economics, reservoir, HPHT/decommission risk, concept, landman |
 | `wells` | 56 | Producing wells — spud/TD/first-oil, rig-days, cumulative oil, uptime |
 | `countries` | 84 | Global offshore funnel — per-country field counts + data-density badge |
+| `parametric_economics` | 30 | WTI price-multiplier x discount-rate NPV grid (jack_st_malo, julia) |
+
+## Economics basis
+
+- `npv_mm` / `breakeven_wti` are **life-to-date**, pre-tax, 10%-discounted: full sunk capex
+  charged against oil produced to date, not full-cycle EUR. Fields early in life are withheld
+  (`economics_status = early_life`, values null) rather than surfaced as absurd numbers.
+- `eur_mmbbl` is **curated published/booked recoverable reserves** with `eur_source` +
+  `eur_confidence` — NOT a decline-fit extrapolation. Null where no credible public figure
+  exists.
+- `parametric_economics` sweeps a uniform multiplier on the historical monthly WTI deck and
+  the annual discount rate over the same sanctioned cashflow model. NPV is exact (affine) in
+  the price multiplier. Fields with withheld economics are excluded from the grid.
 
 ## Provenance
 
@@ -37,19 +52,14 @@ Schema version `1.0.0`. Derived from the committed Explorer results bundle
 (`reports/field-atlas/results/explorer_results_bundle.json`), itself a projection of
 `_explorer.json` + `_atlas_feed.json`. Source snapshots (sha256):
 
-- `reports/lower_tertiary/lifecycle/_explorer.json` — sha256 `99171f138f79ec33…`, 100354 bytes
-- `reports/field-atlas/_atlas_feed.json` — sha256 `50e039377705d8ee…`, 602153 bytes
-
-Data basis: public BSEE data (data.bsee.gov), in-repo curated field YAML, and public operator
-disclosures. Nulls are genuine missing values (not fabricated).
-
-## Note on scope
-
-This is the **Explorer analysis projection** (field/well/country tables for visualization). It is a
-separate artifact from the `aceengineer/worldenergydata-runs` algorithm-run ledger
-(workspace-hub#3433), which carries validated run identity / replay provenance. Kept as its own
-dataset to avoid conflicting with that contract-managed pipeline.
+- `reports/field-atlas/results/explorer_results_bundle.json` — sha256 `05f2864caca2ba08…`
+- `reports/lower_tertiary/lifecycle/_performance.json` — sha256 `0959bfd07588b8c1…`
+- parametric grid: code revision `af2482fd842d`, config
+  `config/parametric/lt_economics_sweep.yml` (sha256 `8ffad49934092964…`), data window through
+  `2026-04-30`, model `worldenergydata.lower_tertiary.v30_financial_reproducer.build_field_npv_timeline`
 
-## Withheld pending data fix (#971)
+## Revision notes
 
-The `npv_mm` and `breakeven_wti` economics columns are **withheld** from the `fields` table pending [worldenergydata#971](https://github.com/vamseeachanta/worldenergydata/issues/971) — the source economics show implausible all-negative NPV / high breakevens for producing fields (a suspected sign/units/price-deck error). Production and reserves columns (`eur_mmbbl`, `cum_oil_mmbbl`, `avg_uptime_pct`, `avg_decline_pct_yr`) are retained.
+- **Economics refresh**: `eur_mmbbl` corrected to curated published reserves (the previous
+  revision carried inflated decline-fit values, since retired); life-to-date NPV / break-even
+  columns added for fields whose economics are surfaced; `parametric_economics` grid added.

fields.parquet

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+size 30515

parametric_economics.parquet

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