gold_well_formation_surfaces
Gridded formation-top surfaces: one row per (basin, formation, grid point) with the interpolated subsea top depth, its uncertainty, and formation thickness (isopach). Built from our formation-top picks; combine with directional surveys to determine where a wellbore landed.
Access tier: portal
Portal. These rows are well-level or producing-unit-level data, or our modelled output at cohort or grid grain. They open with a Portal, Pro or Enterprise plan. The website shows aggregates built from them, never the rows.
Primary key: basin, formation, grid_lat, grid_lon
Region codes: ab, mt, nd, oh, tx, ut, wv, wy
Columns
| Column | Type | Nullable | Description |
|---|---|---|---|
basin |
string | no | Basin the grid is built for: the same basin vocabulary as the well register's basin column. |
formation |
string | no | Formation name for this surface, as the region's builder normalizes it (case conventions differ by region today). Name variants that resolve to one registry unit are pooled into a single surface under the most common name. |
formation_id |
string | yes | Canonical stratigraphic-unit identifier: the join key to the formations register. NULL for surfaces built from names not in the registry (age-level names like "Mississippian", local names not yet curated). |
grid_lat |
float64 | no | Grid point latitude (WGS84). Regular spacing per basin (0.01 degrees, about 1.1 km). |
grid_lon |
float64 | no | Grid point longitude (WGS84). Regular spacing per basin. |
predicted_tvdss |
int32 | no | Formation-top depth at this grid point, subsea, in feet. Negative = below sea level. Interpolated from our formation-top picks (the formation-tops register); no grid point is extrapolated beyond the data's extent. |
predicted_tvdss_stddev |
int32 | no | Uncertainty of predicted_tvdss, in feet (one standard error), calibrated on held-out wells so that plus or minus 2 standard errors has honest coverage. Use it to mask or down-weight low-confidence areas. |
isopach_ft |
int32 | yes | Formation thickness at this grid point, in feet: the distance down to the next formation surface below. NULL for the deepest surface at the point. Computed by actual local depth ordering, so values are never negative. |
n_nearby |
int16 | yes | Number of formation-top observations within 5 miles of this grid point: a data-density indicator, complementary to predicted_tvdss_stddev (how close the control points are vs how confident the model is). Capped at 10,000. |
How these numbers are built is on methodology; the machine twin of this page is data-dictionary.json.